Top Reported Spam Phone Numbers In UK (2025)

As phone scammers and telemarketers become more sophisticated, it is increasingly important for UK residents to be aware of suspicious or unwanted calls. Spam phone numbers can be a significant nuisance and even a security risk. In 2025, many phone numbers have been flagged as spam due to fraudulent activities, spam calls, and scam attempts. If you have encountered any of the numbers listed below, it’s crucial to take action by reporting them and blocking them to protect yourself.

In this article, we’ll review the top reported spam phone numbers in the UK for 2025. We will also delve into their characteristics, common reports, and tips on how to handle such calls. For added clarity, we have included a table summarizing key details about each phone number.

Quick Overview: Top Reported Spam Phone Numbers in the UK

Here is a table that summarizes the phone numbers, the likely nature of the calls, and common complaints associated with each of them.

Phone Number	Common Complaint	Potential Scam Type	Location (if known)
1887224460	Unsolicited call	Fake loan offer	International (India)
2843729360	Silent call	Telecom scam	International (US)
7520619034	Threatening language	Fake tech support	International (US)
1615241776	Robocall	PPI claims	UK (Manchester)
1743817282	Unsolicited call	Timeshare scam	International (US)
1942901396	Robocall	IRS or HMRC scam	International (US)
3301240404	Harassment	Fake lottery claim	UK (National)
3316303321	Robocall	Tax fraud attempt	International (France)
3333035419	Harassment	Fake investment offer	International (US)
1615317256	Unsolicited call	PPI claims	UK (Manchester)

1887224460 – Fake Loan Offer Scam

The number 1887224460 is notorious for making unsolicited calls offering fake loan schemes. These calls usually come from international call centers, often located in India. The scam involves offering quick loans with low-interest rates, only to ask for an upfront payment or personal details.

Common Complaints:

Unsolicited calls offering loans
Requests for bank details or upfront payments
Aggressive follow-ups after initial contact

What to Do:

If you receive a call from this number, do not engage or provide any personal information. It’s advisable to report the call to your service provider and use an app like TrueCaller to block the number. Remember, legitimate financial institutions never ask for upfront fees.

2843729360 – Silent Call Scam

This number has been flagged due to its use in silent calls, a tactic commonly used by scammers to identify potential targets for future fraud. If you receive a call with no response or a prerecorded message, it is likely from this number.

Common Complaints:

No one responds when you pick up
Calls drop abruptly
Often used to gather data for further scamming

What to Do:

Silent calls are often a sign of a scam operation. If you notice a pattern, report the number to Ofcom and block it immediately. Avoid calling the number back as it could be a premium-rate number.

7520619034 – Fake Tech Support

A popular scam involves fake tech support calls, where fraudsters claim to have detected issues on your computer. The number 7520619034 is often used in such scams, with the caller trying to convince you that your computer is infected with a virus or has security issues.

Common Complaints:

Claiming to be from a known tech support company
Requests to remote access your computer or install software
Demands for payment to fix non-existent problems

What to Do:

Never allow unknown callers to access your computer or ask for payment over the phone. Hang up immediately if you suspect a scam and report the number to Action Fraud.

1615241776 – PPI Claims Robocall

The number 1615241776 is notorious for robocalls related to PPI (Payment Protection Insurance) claims. Despite PPI claims being a legitimate service in the past, the calls have turned into a source of annoyance, often with misleading or fraudulent offers.

Common Complaints:

Automated, prerecorded messages
Requests for personal details like national insurance numbers
Repeated calls even after blocking

What to Do:

Block the number and report the robocall to Ofcom. If you are unsure about a PPI claim, always verify it through official channels rather than unsolicited phone calls.

1743817282 – Timeshare Scam

Timeshare scams continue to thrive in the UK, with numbers like 1743817282 often making unsolicited calls offering exclusive holiday packages or property investments. These calls prey on vulnerable individuals looking for holiday opportunities.

Common Complaints:

Offering discounted holiday packages or timeshare opportunities
Requests for payment upfront for services that don’t exist
High-pressure sales tactics

What to Do:

Always research companies offering timeshare packages thoroughly and never make any payments over the phone without first verifying the legitimacy of the offer. You can report suspicious calls to Action Fraud.

1942901396 – IRS/HMRC Scam

Scammers impersonating tax agencies, like the IRS in the US or HMRC in the UK, often use numbers like 1942901396 to threaten individuals with arrest or legal action for alleged tax fraud.

Common Complaints:

Threatening calls claiming unpaid taxes
Requests for immediate payment to avoid arrest
Often involves international numbers for added pressure

What to Do:

If you receive a call claiming to be from HMRC or the IRS, hang up immediately. Tax agencies never demand payment over the phone. Report the incident to HMRC or Action Fraud and block the number.

3301240404 – Fake Lottery Scam

The number 3301240404 is frequently reported for being used in fake lottery scams. Victims are informed that they have won a large prize but need to pay taxes or fees upfront to claim their winnings.

Common Complaints:

Fake lottery or prize-winning claims
Requests for payment before prizes can be claimed
Calls from international numbers

What to Do:

If you receive a call claiming you’ve won a prize, never send money or provide personal information. Legitimate lotteries never ask winners for money. Report the scam to Action Fraud.

3316303321 – Tax Fraud Attempt

The number 3316303321 is associated with calls claiming to be from the HMRC or similar tax authorities. These calls often threaten victims with legal action if they don’t pay back taxes or settle a supposed debt.

Common Complaints:

Fraudulent claims of tax fraud or unpaid taxes
Immediate threats of arrest or legal action
Requests for payments or personal details

What to Do:

Do not respond to such calls, and report them to HMRC. It’s essential to verify any tax issues through official channels rather than over the phone.

3333035419 – Fake Investment Offers

Investment scams continue to be a major issue in the UK, with numbers like 3333035419 making unsolicited calls offering fake investment opportunities. These calls promise high returns on “guaranteed” investments, often related to cryptocurrencies or foreign exchange trading.

Common Complaints:

Promises of high returns with minimal risk
Requests for payment or investments in non-existent schemes
Often comes with urgency or pressure to act quickly

What to Do:

Always be skeptical of unsolicited investment offers. Research any investment opportunity through reputable sources and never send money to unknown parties. If you suspect a scam, report it to Action Fraud.

1615317256 – PPI Claims Robocall

Another common number related to PPI claims robocalls is 1615317256. These automated calls often claim to help you recover PPI compensation, even if you never applied for such insurance.

Common Complaints:

Automated robocalls offering PPI claims
Requests for sensitive personal information
Calls received despite being on the TPS (Telephone Preference Service) list

What to Do:

Do not engage with robocalls. Hang up and block the number. If you’ve been receiving persistent unsolicited calls, report them to Ofcom.

Conclusion: Protect Yourself from Spam Numbers

Spam and scam phone numbers can be a persistent threat, but by staying vigilant, reporting suspicious calls, and utilizing tools like TrueCaller, WhoCalledMe, and Ofcom, you can protect yourself from these nuisances. Be cautious when dealing with unsolicited calls, especially those asking for personal details or payments. Always verify the authenticity of the caller, and never provide sensitive information over the phone unless you’re certain of the identity of the caller.

Remember, your best defense is awareness and action. Stay informed about the top reported spam phone numbers, and don’t hesitate to block or report these numbers if you receive unwanted calls.