Technology

How to stop phone number spoofing and protect yourself from scammers

Published

2 years ago

March 1, 2024

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How to stop phone number spoofing and protect yourself from scammers

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Tired of getting random calls from strangers, wondering whether or not it’s something to be concerned about?

What about when a person calls saying they’ve got a missed phone call from your number?

Or, how about when you see a phone number that looks familiar (perhaps has the same area code), but when you answer, it’s a telemarketer or someone trying to sell you something?

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Woman on her cellphone (Kurt “CyberGuy” Knutsson)

What is going on here?

Phone spoofing, also known as phone number spoofing, is a deceptive practice that scammers use to trick you into answering their calls. By using software or devices, they can make any number appear on the caller ID, even if it belongs to someone else. This can cause problems for both the owner of the spoofed number and the potential victims of the scam.

WHAT IS ARTIFICIAL INTELLIGENCE (AI)?

Here’s what you need to know about phone spoofing and how to stop it so that you can protect yourself (and others) from scammers.

Woman on a cellphone at a laptop (Kurt “CyberGuy” Knutsson)

MORE: HOW TO STAY INCOGNITO AND CONCEAL YOUR NUMBER WHEN CALLING SOMEONE

What is phone number spoofing?

Phone spoofing is when scammers get control of your phone number. They can then use your phone number to steal your data or use it to target other people. Instead of a strange phone number or company coming up in your caller ID, they can pass through scam detection by posing as a number you may recognize. This is known as “neighbor spoofing” because scammers will target people within the same — or nearby — area code, which people are less likely to ignore.

But phone number spoofing can be even more sophisticated. Sometimes scammers can spoof the phone numbers of banks, government agencies, police departments, corporations and more. And when most people see those names come up on their caller ID, they generally feel like it’s important or at least an organization they trust, prompting them to answer and not even think twice about who may be on the other line.

Man frustrated by caller (Kurt “CyberGuy” Knutsson)

MORE: HOW SCAMMERS USE GOOGLE VERIFICATION CODES TO STEAL YOUR IDENTITY AND MONEY

What are scammers doing with my phone number?

Once scammers get their hands on your phone number, they can do all sorts of things. In one scenario, they may target you and say you owe a bill for something, prompting you to give up sensitive data about yourself.

In more serious scenarios, they can call your phone and tell you they have your friend or family member who’s in danger and that they need you to send money right away. And with AI voice technology that can replicate voices, this is becoming an even scarier reality. Other times, they use your spoofed number against you, committing identity theft as they’ll have access to your number to get through to your accounts.

Woman stressed out on the phone (Kurt “CyberGuy” Knutsson)

MORE: TIPS TO FOLLOW FROM ONE INCREDIBLY COSTLY CONVERSATION WITH CYBERCROOKS

How to stop phone number spoofing: When your phone number is spoofed to harm others

If you have a feeling that your phone number has been spoofed, there are some things you can do to stop the situation from getting out of hand.

Step 1: Determine if your phone number has been spoofed

One of the best ways to know that your number has been spoofed is if you’re getting lots of calls from people who tell you they’ve received a missed call or phone call from your number. If you don’t know them and you check your call history to see you’ve never called their number, there’s a good chance that your number has been spoofed and was used to try and trick them.

Step 2: Find out how these scammers hijacked your phone number in the first place

Your number may have been leaked in a data breach. Or you may have your number public somewhere online. You may have answered a spam call accidentally in the past. Or you may have permitted a company to sell your phone number (this is more common with telemarketers). At the same time, data brokers could be intentionally looking for this information, and they’re good at finding it. Next, they hijack your number. They physically do this by:

Port-out method: Once hijackers get your phone number via one of the methods above (in addition to other personal information), they contact your mobile carrier and pose as the account holder, aka you. Once they get in, they request a “port-out” of the phone number, which is when they ask the carrier to transfer your phone number to a new carrier or account. Generally, phone companies should see this as a red flag and ask follow-up questions, but savvy scammers can get around this. Once the port-out is approved, the phone number is activated on their new SIM card and they have total control.

SIM-swap method: This is when a phone spoofer convinces the mobile service provider to issue a new SIM card with your phone number. All they need to do is pop the SIM card into their device to get the same access as the port-out method.

Stealing your physical phone: One of the most straightforward ways to hijack your number is one of the most simple: stealing your mobile device and gaining access to it.

Remember, once they have control of your phone number, they may use it to commit identity theft against you, not just as a phone spoof to harm others.

Woman on a phone call (Kurt “CyberGuy” Knutsson)

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Step 3: Follow these steps if your phone number has already been spoofed

Even if your phone has been “hijacked,” you can still do something about it. Here’s how:

Apologize to the victims: If people start calling you to let you know they’ve received a scam call from your number, apologize to them right away and let them know that your phone number has been spoofed and that it’s being used to target them. This can help them decide what to do next (which we’ll cover later).

Create a voicemail message: If you’re getting a lot of these calls nonstop, you might want to change your voicemail message to let them know what’s happening. This essentially automates the process, and you don’t need to spend your day answering the phone either.

Notify your mobile carrier: Call your mobile carrier to let them know that you’re confident your phone number has been spoofed. They can help you take the next steps to stop it in its tracks.

Change your phone number: Whether or not your mobile carrier advises you to do so, it might be a good idea to consider changing your phone number. It may not stop scammers from using it to victimize others, but it will help you to stop getting notifications.

Step 4: Prevent scammers from spoofing your phone number in the future

If you end up changing your phone number, you’ll want to be sure that you can prevent scammers from taking your number in the future. Here are a few things you can do:

Don’t publicize your phone number online: Don’t ever provide your phone number to strangers or make it easy for them to get your phone number via a verification scam. Additionally, if you’re creating an account for a new website, and they ask about your phone number, try to avoid giving it. It may be difficult with a bank, for instance, which may use your phone number to verify your identity. But if you can avoid giving your phone number, then you should.

Use a data removal service: There are so many websites that can potentially have your data because you may have unknowingly permitted them to do so. By using a data removal service, you can get your number offline.

While no service promises to remove all your data from the internet, having a removal service is great if you want to constantly monitor and automate the process of removing your information from hundreds of sites continuously over a longer period of time. Check out my top picks for personal data removal services here.

Update passwords on your phone: It may go without saying, but make sure your phone’s passwords are updated. You’ll want to create a strong password for your phone and avoid using the same password for multiple online accounts. Consider using a password manager to securely store and generate complex passwords. It will help you to create unique and difficult-to-crack passwords that a hacker could never guess. Also, enable a PIN or biometrics to get into your phone. This is so that if someone steals your phone, they can’t get access to your information.

Man on a phone call (Kurt “CyberGuy” Knutsson)

Stay calm and steer clear: If you have any hunch that you are being scammed, stay calm, don’t panic and immediately hang up the phone. You can also try another tactic, which is asking the spammer a lot of questions to catch them off guard. Sometimes they’ll realize you’ve set them in a trap and will hang up the phone themselves.

Ultimately — no matter how convincing or familiar the story or phone number is — you want to be sure that you aren’t giving any sensitive data or money to these people. If someone is saying you owe a bill, tell them you will call your bank and get back to them. Even if they already know some of your personal information, do not comply. If it’s legitimate, they’ll understand that you need to double-check.

Alert the appropriate parties: Even if you recognize it’s a scam, sometimes these people are relentless. So, if they continue to call you and harass you nonstop (and it’s from the same number), you have some options:

Notify your mobile carrier: Let them know that you’re confident your phone number has been spoofed. They can help you take the next steps to stop it in its tracks.
Notify the FCC: The Federal Communications Commission is the relevant party you’ll want to contact if you continue to get scam calls, whether they are from phone spoofers or robocalls and telemarketers. You can file a complaint here.
Notify the FTC: If you’ve already, unfortunately, fallen victim to a scam, you can report it to the Federal Trade Commission, here.

Don’t get spammed again: You’ve probably noticed that when you get a call on your phone, it will say “scam likely” in red, prompting you to ignore it. Cellphones these days are pretty good at detecting calls from scammers. This makes it more challenging for scammers to do their dirty work. So, they need another strategy to get around it, which is why they phone spoof. But you can outsmart them, even when they use a familiar-looking number:

Use a spam blocker to keep scammers at bay: To keep spammers and scammers away, install a spam blocker on your phone. Many phone carriers already have this service on the phone (as mentioned above), but there are additional apps you can put on your phone as an extra layer of security, like Truecaller.
Block the number on your phone: Depending on what type of phone you have, you can block the actual number from contacting you again. However, keep in mind that phone number spoofers are savvy and are difficult to keep up with. This method is better if it’s a specific number that keeps trying to contact you.
Block robocalls with apps: Sometimes spammers are robots utilized by telemarketers. Some of those scam-blocking apps work against robocalls. But you can also register your number on the national “Do Not Call Registry” to stop them. You can do this by calling 1-888-382-1222 or visiting www.donotcall.gov/.
Utilize data removal services: If you want robots and other spammers/scammers to stop calling your phone number altogether, some apps and services can help you find and remove your data wherever it is on the Internet. These can also be used to protect yourself against phone spoofing.

MORE: HOW TO BLOCK THOSE UNWANTED AND ANNOYING SPAM EMAILS

Kurt’s key takeaways

While phones may have gotten better at blocking spam calls, scammers will stop at nothing to try and trick you. This is why phone spoofing is a good idea for them; they have a much better chance of getting through spam blockers and connecting with you because you may think it’s safe to answer the phone.

We won’t even be able to stop these scammers 100%. But by knowing what to do if your phone number has been hijacked or you’re being targeted by someone else’s phone number who has been spoofed, you can do your part in making sure these people know we’re onto them.

Have you ever had your phone number spoofed? Or have you ever picked up the phone because you recognized the area code, only to realize it was a potential scam? How did you handle it? Let us know by writing us at Cyberguy.com/Contact.

For more of my tech tips & security alerts, subscribe to my free CyberGuy Report Newsletter by heading to Cyberguy.com/Newsletter.

Ask Kurt a question or let us know what stories you’d like us to cover.

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Technology

Grubhub confirms data breach amid extortion claims

Published

11 hours ago

January 27, 2026

Press Room

Grubhub confirms data breach amid extortion claims

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Food delivery platform Grubhub has confirmed a recent data breach after unauthorized actors accessed parts of its internal systems.

The disclosure comes as sources tell BleepingComputer the company is now facing extortion demands linked to stolen data.

In a statement to BleepingComputer, Grubhub said it detected and stopped the activity quickly.

“We’re aware of unauthorized individuals who recently downloaded data from certain Grubhub systems,” the company said. “We quickly investigated, stopped the activity, and are taking steps to further increase our security posture.”

Grubhub added that sensitive information, such as financial details or order history, was not affected. However, the company declined to answer follow-up questions about when the breach occurred, whether customer data was involved or if it is actively being extorted.

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RANSOMWARE ATTACK EXPOSES SOCIAL SECURITY NUMBERS AT MAJOR GAS STATION CHAIN

Grubhub confirmed a data breach after unauthorized actors accessed parts of its internal systems, prompting an investigation and heightened security measures. (Michael Nagle/Bloomberg via Getty Images)

What Grubhub has confirmed so far

While details remain limited, Grubhub confirmed several key points. It has brought in a third-party cybersecurity firm and notified law enforcement. Beyond that, the company has stayed largely silent. That lack of detail has raised concern, especially given Grubhub’s recent security history. Just last month, the company was linked to scam emails sent from its own b.grubhub.com subdomain. Those messages promoted a cryptocurrency scam promising large returns on Bitcoin payments. Grubhub said it contained the incident and blocked further unauthorized emails. It did not clarify whether the two events are related.

Sources link the breach to ShinyHunters extortion

According to multiple sources cited by BleepingComputer, the ShinyHunters hacking group is behind the extortion attempt. The group has not publicly commented on the claims and declined to respond when contacted. Sources say the attackers are demanding a Bitcoin payment to prevent the release of stolen data. That data reportedly includes older Salesforce records from a February 2025 breach and newer Zendesk data taken during the most recent intrusion. Grubhub uses Zendesk to run its online customer support system. That platform handles order issues, account access and billing questions, making it a valuable target for attackers.

How stolen credentials may have enabled the attack

Investigators believe the breach may be tied to credentials stolen during earlier Salesloft Drift attacks. In August 2025, threat actors used stolen OAuth tokens from Salesloft’s Salesforce integration to access sensitive systems over a 10-day period. According to a report from Google Threat Intelligence Group, also known as Mandiant, attackers used that stolen data to launch follow-up attacks across multiple platforms. “GTIG observed UNC6395 targeting sensitive credentials such as AWS access keys, passwords and Snowflake-related access tokens,” Google reported. ShinyHunters previously claimed responsibility for that campaign, stating it stole roughly 1.5 billion records from Salesforce environments tied to hundreds of companies.

Why this breach still matters

Even if payment data and order history were not affected, support systems often contain personal details. Names, email addresses and account notes can be enough to fuel phishing attacks or identity scams. More importantly, this incident highlights how older breaches can continue to cause damage long after the initial attack. Stolen credentials that are never rotated remain a powerful entry point for threat actors.

Ways to stay safe after the Grubhub data breach

If you use Grubhub or any online delivery service, a few smart steps can reduce your risk after a breach.

1) Update your password and stop re-use

Start by changing your Grubhub password right away. Make sure you do not reuse that password anywhere else. Reused passwords give attackers an easy path into other accounts. A password manager can help here. It creates strong, unique logins and stores them securely so you do not have to remember them all.

Next, see if your email has been exposed in past breaches. Our No. 1 password manager pick includes a built-in breach scanner that checks whether your email address or passwords have appeared in known leaks. If you discover a match, immediately change any reused passwords and secure those accounts with new, unique credentials.

Check out the best expert-reviewed password managers of 2026 at Cyberguy.com.

ILLINOIS DHS DATA BREACH EXPOSES 700K RESIDENTS’ RECORDS

The food delivery platform says it quickly stopped the intrusion but has not disclosed when the breach occurred or whether customers were targeted. (Leonardo Munoz/VIEWpress)

2) Turn on two-factor authentication

If two-factor authentication (2FA) is available, enable it. This adds a second step when you sign in, such as a code sent to your phone or app. Even if a hacker steals your password, two-factor authentication can stop them from getting in.

3) Watch closely for phishing attempts and use strong antivirus software

Be alert for emails or texts that mention orders, refunds or support issues. Attackers often use stolen support data to make messages feel urgent and real. Do not click links or open attachments unless you are certain they are legitimate. Strong antivirus software can also help block malicious links and downloads before they cause harm.

The best way to safeguard yourself from malicious links that install malware, potentially accessing your private information, is to have strong antivirus software installed on all your devices. This protection can also alert you to phishing emails and ransomware scams, keeping your personal information and digital assets safe.

Get my picks for the best 2026 antivirus protection winners for your Windows, Mac, Android and iOS devices at Cyberguy.com.

4) Remove your data from people-search sites

Consider using a data removal service to reduce your online footprint. These services help remove your personal details from data broker sites that attackers often use to build profiles. Less exposed data means fewer tools for scammers to exploit.

While no service can guarantee the complete removal of your data from the internet, a data removal service is really a smart choice. They aren’t cheap, and neither is your privacy. These services do all the work for you by actively monitoring and systematically erasing your personal information from hundreds of websites. It’s what gives me peace of mind and has proven to be the most effective way to erase your personal data from the internet. By limiting the information available, you reduce the risk of scammers cross-referencing data from breaches with information they might find on the dark web, making it harder for them to target you.

Check out my top picks for data removal services and get a free scan to find out if your personal information is already out on the web by visiting Cyberguy.com.

Get a free scan to find out if your personal information is already out on the web: Cyberguy.com.

5) Ignore crypto messages using trusted brands

Be skeptical of any cryptocurrency offers tied to familiar companies. Grubhub was previously linked to scam emails promoting crypto schemes, which shows how often attackers abuse trusted names. Legitimate companies do not promise fast returns or pressure you to act immediately.

6) Monitor your Grubhub account and email activity

Check your Grubhub account for anything that looks unfamiliar. Watch for unexpected password reset emails, order confirmations or support messages you did not request. Attackers often test stolen data quietly before making bigger moves.

7) Secure the email linked to your Grubhub account

Your email account is the key to password resets. Change that password and enable two-factor authentication if it is not already on. If attackers control your email, they can regain access even after you change other passwords.

8) Stay alert for delayed scams tied to the breach

Breach data is often reused weeks or months later. Phishing attempts may appear long after headlines fade. Treat any future messages claiming to reference Grubhub support, refunds or account issues with extra caution.

These steps will not undo a breach, but they can limit how attackers exploit stolen information and reduce your risk going forward.

FIBER BROADBAND GIANT INVESTIGATES BREACH AFFECTING 1M USERS

Sources tell BleepingComputer the Grubhub breach is tied to extortion demands involving allegedly stolen customer support data. (Gabby Jones/Bloomberg via Getty Images)

Kurt’s key takeaways

Grubhub’s confirmation puts an official stamp on what sources have warned about for weeks. While the company says sensitive data was not affected, unanswered questions remain. As extortion-driven breaches rise, transparency and rapid credential rotation matter more than ever. What stands out most is how past compromises continue to create new risks. When access tokens live too long, attackers do not need to break in again. They simply walk back through an open door.

If companies stay quiet after breaches, how can customers know when it is time to protect themselves? Let us know by writing to us at Cyberguy.com.

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Kurt “CyberGuy” Knutsson is an award-winning tech journalist who has a deep love of technology, gear and gadgets that make life better with his contributions for Fox News & FOX Business beginning mornings on “FOX & Friends.” Got a tech question? Get Kurt’s free CyberGuy Newsletter, share your voice, a story idea or comment at CyberGuy.com.

Technology

TikTok is still down, here are all the latest updates

Published

22 hours ago

January 27, 2026

Press Room

TikTok is still down, here are all the latest updates

Starting early Sunday morning, TikTok’s now under new ownership US arm started breaking down just a couple of days after Oracle & Co took the reins. Its For You page algorithm is suddenly unreliable, while features like comments are failing to load or loading slowly, and publishing new videos seems nearly impossible for many people.

Rumors of censorship targeting anti-ICE protesting or attempting to block discussion of Jeffrey Epstein appear to be misguided (even the governor of California is resharing misinformation now), with problems blocking traffic to all kinds of videos and messages on the service through Monday night.

Read on below for the latest updates about the ongoing TikTok problems.

Technology

Malicious Google Chrome extensions hijack accounts

Published

23 hours ago

January 27, 2026

Press Room

Malicious Google Chrome extensions hijack accounts

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Cybersecurity researchers have uncovered a serious threat hiding inside Google Chrome.

Several browser extensions pretend to be helpful tools. In reality, they quietly take over user accounts. These extensions impersonate popular human resources and business platforms such as Workday, NetSuite and SAP SuccessFactors. Once installed, they can steal login data and block security controls designed to protect users.

Many people who installed them had no warning signs that anything was wrong.

WHY CLICKING THE WRONG COPILOT LINK COULD PUT YOUR DATA AT RISK

Cybersecurity researchers warn that fake Google Chrome extensions are silently hijacking user accounts by stealing login data and bypassing security protections. (Bildquelle/ullstein bild via Getty Images)

The fake Chrome extensions to watch out for

Security researchers from Socket’s Threat Research Team identified five malicious Chrome extensions connected to this campaign. The add-ons were marketed as productivity or security tools, but were designed to hijack accounts.

The extensions include:

DataByCloud Access
Tool Access 11
DataByCloud 1
DataByCloud 2
Software Access

We reached out to Google, and a spokesperson told CyberGuy that the extensions are no longer available on the Chrome Web Store. However, some are still available on third-party software download sites, which continues to pose a risk. If you see any of these names installed in your browser, remove them immediately.

Why malicious Chrome extensions look legitimate

These malicious add-ons are designed to look legitimate. They use professional names, polished dashboards and business-focused descriptions. Some claim to offer faster access to workplace tools. Others say they restrict user actions to protect company accounts. Privacy policies often promise that no personal data is collected. For people juggling daily work tasks or managing business accounts, the pitch sounds helpful rather than suspicious.

What these extensions actually do

After installation, the extensions operate silently in the background. They steal session cookies, which are small pieces of data that tell websites you are already logged in. When attackers get these cookies, they can access accounts without a password. At the same time, some extensions block access to security pages. Users may be unable to change passwords, disable accounts or review login history. One extension even allows criminals to insert stolen login sessions into another browser. That lets them sign in instantly as the victim.

Why malicious Chrome extensions are so dangerous

This attack goes beyond stealing credentials. It removes the ability to respond. Security teams may detect unusual activity, but cannot fix it through normal controls. Password changes fail. Account settings disappear. Two-factor authentication tools become unreachable. As a result, attackers can maintain access for long periods without being stopped.

How to check for these extensions on your computer

If you use Google Chrome, review your extensions now. The process only takes a few minutes.

Open Google Chrome
Click the three-dot menu in the top right corner
Select Extensions, then choose Manage Extensions
Review every extension listed

Look for unfamiliar names, especially those claiming to offer access to HR platforms or business tools.

WEB SKIMMING ATTACKS TARGET MAJOR PAYMENT NETWORKS

Malicious Chrome add-ons disguised as productivity tools targeted users of popular business platforms like Workday, NetSuite and SAP SuccessFactors. (Photo by S3studio/Getty Images)

How to remove suspicious Chrome extensions

If you find one of these extensions, remove it immediately.

Open Manage Extensions in Chrome
Find the suspicious extension
Click Remove
Confirm when prompted

Restart your browser after removal to ensure the extension is fully disabled. If Chrome sync is enabled, repeat these steps on all synced devices before turning sync back on.

What to do after removing the extension

Removal is only the first step. Change passwords for any accounts accessed while the extension was installed. Use a different browser or device if possible.

A password manager can help you create strong, unique passwords for each account and store them securely. This reduces the risk of reused passwords being exploited again.

Check out the best expert-reviewed password managers of 2026 at Cyberguy.com.

Finally, review account activity for unfamiliar logins, locations or devices and be sure to follow the steps below to stay safe moving forward.

Ways to stay safe going forward

Simple habits can significantly reduce your risk.

1) Limit browser extensions

Only install extensions you truly need. The fewer extensions you use, the smaller your attack surface becomes.

2) Be cautious with add-ons

Avoid extensions that promise premium access or special tools for enterprise platforms. Legitimate companies rarely require browser add-ons for account access.

3) Check permissions carefully

Be wary of extensions that request access to cookies, browsing data or account management. These permissions can be abused to hijack sessions.

4) Review extensions regularly

Check your browser every few months and remove tools you no longer use or recognize.

WHATSAPP WEB MALWARE SPREADS BANKING TROJAN AUTOMATICALLY

Several fake browser extensions were removed from the Chrome Web Store after researchers linked them to account takeover attacks. (Photo Illustration by Serene Lee/SOPA Images/LightRocket via Getty Images)

5) Use strong antivirus software

Strong antivirus software can help detect malicious extensions, block suspicious behavior and alert you to browser-based threats before damage occurs.

Get my picks for the best 2026 antivirus protection winners for your Windows, Mac, Android and iOS devices at Cyberguy.com.

6) Consider a data removal service

If your work or personal information has been exposed, a data removal service can help reduce your digital footprint by removing your details from data broker sites. This lowers the risk of follow-up scams or identity misuse.

Check out my top picks for data removal services and get a free scan to find out if your personal information is already out on the web by visiting Cyberguy.com.

Get a free scan to find out if your personal information is already out on the web: Cyberguy.com.

7) Avoid third-party download sites

Do not reinstall extensions from third-party websites, even if they claim to offer the same features. These sites often host outdated or malicious versions.

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Kurt’s key takeaways

Browser extensions can be useful, but this research shows how easily they can also be abused. These fake Chrome add-ons did not rely on flashy tricks or obvious warnings. They blended in, looked professional and quietly did their damage in the background. The good news is that you do not need to be a tech expert to protect yourself. Taking a few minutes to review your extensions, remove anything unfamiliar and lock down your accounts can make a real difference. Small habits, repeated regularly, go a long way in reducing risk. If there is one takeaway here, it is this: convenience should never come at the cost of security. A clean browser and strong account protections give you back control.

How many browser extensions do you have installed right now that you have never looked at twice? Let us know by writing to us at Cyberguy.com.