List of Spam and Scam Numbers You Should Block (2026 Guide)

Getting unwanted calls has become one of the most common digital annoyances today. Whether it’s a robocall about a “car warranty,” a fake bank alert, or a scammer pretending to be from the IRS, spam calls are flooding phones everywhere. This guide breaks down what you need to know about spam numbers, how scammers operate, and how you can protect yourself.

Why Spam Calls Keep Increasing

Robocalls and scam calls have grown massively over the past few years because of cheap auto-dialing software and number spoofing technology. Scammers can generate thousands of calls per minute at almost no cost, and they often disguise their real number to look like a local area code, making people more likely to answer. This is why blocking known numbers alone often isn’t enough — scammers rotate numbers constantly to avoid detection.

Common Types of Scam Calls to Watch For

1. IRS/Tax Scam Calls

These callers pretend to be government tax officials, claiming you owe money and threatening arrest or legal action if you don’t pay immediately, usually through gift cards or wire transfers. Real government agencies never demand payment this way over the phone.

2. Bank/Card Verification Scams

Scammers pose as your bank, claiming suspicious activity on your account and asking you to “verify” your card number, PIN, or OTP. Banks never ask for this sensitive information over an unsolicited call.

3. Car Warranty Scams

One of the most reported robocall types, these calls claim your car’s warranty is expiring and pressure you to renew it immediately, often for a service that doesn’t even exist.

4. Tech Support Scams

Callers claim your computer has a virus or security issue and offer to “fix” it remotely, then either charge huge fees or install actual malware on your device.

5. Prize/Lottery Scams

You’re told you’ve won a prize, lottery, or sweepstakes, but need to pay a “processing fee” or provide personal details to claim it. Legitimate prizes never require upfront payment.

6. Social Security Scams

These calls claim your Social Security number has been “suspended” due to suspicious activity, creating panic to pressure victims into sharing personal information.

Signs a Call Might Be a Scam

Certain patterns show up again and again in scam calls, and learning to recognize them can save you a lot of trouble. Be cautious if the caller creates a sense of urgency or pressures you to act immediately, since scammers rely on panic to stop people from thinking clearly. Requests for personal information like your SSN, bank details, or OTP codes over the phone are a major red flag — legitimate organizations rarely ask for this over a call. Threats of arrest, lawsuits, or immediate consequences are another common scare tactic used to push victims into compliance. Unusual payment requests, especially demands for gift cards, wire transfers, or cryptocurrency, are almost always a sign of fraud, since real institutions don’t ask for payment this way. Finally, be wary of calls from numbers with unfamiliar international codes, or numbers that look suspiciously similar to your own area code, since this is often a spoofing tactic to make the call seem local and trustworthy.

How to Block Spam and Scam Numbers

On Android

Open your Phone app, go to Recent Calls, tap on the suspicious number, then select “Block/Report Spam.” Most Android phones also let you enable “Caller ID & Spam Protection” in settings, which automatically flags suspected spam calls before you even answer.

On iPhone

Go to the Phone app, tap the “i” icon next to the number, scroll down, and select “Block this Caller.” iPhones also offer a “Silence Unknown Callers” feature in Settings > Phone, which sends unknown numbers straight to voicemail.

Using Third-Party Apps

Apps like Truecaller, RoboKiller, Hiya, and Nomorobo maintain large, regularly updated databases of reported spam numbers. These apps automatically identify and block known scam callers in real time, which is often more effective than manually blocking numbers one by one, since scammers change numbers frequently.

List of Scam Numbers You Should Block
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You can also download the full list in PDF

You can also download the full list in PDF

How to Report Scam Calls

Blocking a number helps you personally, but reporting it helps protect others too. In the United States, you can report scam calls to the Federal Trade Commission (FTC) at reportfraud.ftc.gov, or to the FCC through their consumer complaint center. Reporting these numbers helps regulators track patterns and take action against repeat offenders.

Final Thoughts

Spam and scam calls aren’t going away anytime soon, but staying informed and using the right tools can significantly reduce how often they reach you. Combining number blocking, spam-detection apps, and basic awareness of common scam tactics gives you the best protection. Download the list above, keep your call-blocking app updated, and always stay cautious when an unknown number claims urgency or asks for personal information.