Top Reported Spam Phone Numbers in the UK (2025)

In the digital age, phone scams are becoming more sophisticated and widespread, leaving UK residents constantly on guard against unwanted and potentially harmful calls. Whether it’s telemarketers, fraudsters, or debt collectors, spam phone numbers can cause frustration, confusion, and even financial loss.

In this article, we take a close look at some of the top reported spam phone numbers in the UK in 2025, and what you can do to protect yourself. From scam calls to marketing tricks, we’ll provide a detailed overview of each number, a table for easy reference, and tips on how to block or report these numbers.

Quick Overview of Top Reported Spam Phone Numbers in the UK

Below is a list of some of the most frequently reported spam phone numbers across the UK. These numbers have been flagged by services like WhoCalledMe, TrueCaller, and reports to official bodies like Ofcom and TPS.

Phone Number	Location	Type of Spam	Frequency of Reports
07418374634	Mobile (UK)	Fraud / Scam	High
02032686663	London	Marketing / Scam	High
0151 317 8500	Liverpool	Scam (Financial Fraud)	Moderate
02080906677	London	Marketing / Scam	High
02038976533	London	Scam / Robocall	Moderate
0161 884 3145	Manchester	Debt Collection / Scam	High
02039616447	London	Financial Scam	High
01915433407	Essex	Scam / Robocall	Moderate
01792722635	Cardiff	Scam (PPI or Loans)	High
01223609721	Cambridge	Telemarketing / Scam	Moderate

Let’s dive deeper into each number and understand why these calls are causing such an uproar.

07418374634: Fraud & Scam Calls

The number 07418374634 is one of the most frequently reported scam numbers in the UK. Typically, this number is associated with fraudsters who pose as legitimate companies, often claiming to be from well-known institutions like banks or utility providers. The callers may ask for sensitive personal information, including bank details, passwords, or other confidential data.

How to Recognize This Scam:

Calls often mention “urgent action” or threats of account suspension.
They may ask you to click on links or provide personal details.
The callers tend to sound authoritative and convincing.

What You Can Do:

Do not engage with the caller.
Hang up immediately if they ask for any sensitive information.
Report the number to the ICO (Information Commissioner’s Office).

02032686663: Marketing and Scam Calls

This London-based number 02032686663 has been widely flagged for its involvement in unsolicited marketing calls and scams. The callers behind this number often offer “too-good-to-be-true” deals on products like insurance, loans, or timeshares. While some calls are harmless, many turn out to be scams designed to extract payment or personal details from victims.

How to Recognize This Scam:

Calls may claim to offer discounts or free trials for well-known products.
The caller may ask for payment upfront or credit card information.
Offers might be time-sensitive or high-pressure.

What You Can Do:

Always verify the company’s details before making any payments.
Block the number and report it to TrueCaller and Ofcom.

0151 317 8500: Financial Fraud

Another frequent offender is the number 0151 317 8500, which has been linked to various financial scams. In many cases, these calls involve fake debt collection or loan scams, where the caller threatens to take legal action unless an immediate payment is made. The fraudsters often sound official and may even reference fake company names to gain trust.

How to Recognize This Scam:

The caller may claim you owe money to a company you’ve never heard of.
Threats of legal action are common if payment isn’t made immediately.
They often demand payment via untraceable methods like gift cards or bank transfers.

What You Can Do:

Hang up and do not engage.
Contact the alleged company directly to verify the claim.
Report the number to TPS (Telephone Preference Service).
02080906677: Marketing Calls & Scams

The number 02080906677 is commonly associated with both legitimate marketing calls and scams. Many UK residents have reported receiving unsolicited calls offering everything from debt management services to bogus prize wins. The caller often pressures you to make quick decisions, which is a red flag for a scam.

How to Recognize This Scam:

You may receive an unsolicited call offering a prize or a special deal.
The caller might ask for personal details or financial information.
If they claim you’ve won something but you don’t remember entering, it’s likely a scam.

What You Can Do:

Avoid sharing any personal details over the phone.
Report the number to WhoCalledMe for others to be aware.
Use call-blocking apps like TrueCaller to avoid further contact.

02038976533: Robocalls and Scams

The number 02038976533 is often identified as a robocall number, where an automated system dials numbers in an attempt to sell products or scam individuals. These robocalls might promote everything from credit repair services to fraudulent investment opportunities.

How to Recognize This Scam:

The call is automated, often asking you to press a number to get more information.
The recorded message may try to persuade you to buy a service or provide payment details.
There is usually no human interaction, which is a clear warning sign.

What You Can Do:

Hang up immediately if it’s a robocall.
Report the number to ICO and block the number on your device.

0161 884 3145: Debt Collection and Scam Calls

The number 0161 884 3145 is typically associated with fake debt collectors. Scammers pretending to be debt collection agencies contact individuals, often making threats about court actions or garnishing wages. These scammers are known to target vulnerable people, pressuring them into paying fake debts.

How to Recognize This Scam:

The caller claims to be from a debt collection agency.
They threaten to take legal action if payment isn’t made immediately.
The caller may offer a “settlement” to clear the debt quickly, which often involves transferring money.

What You Can Do:

Never make any payment until you’ve verified the debt.
If you don’t owe the money, report the scam to Ofcom.

02039616447: Financial Scams

Another London number, 02039616447, has been flagged for fraudulent financial services calls. These scams often offer fake loans, credit cards, or financial services. The callers may promise low interest rates or “guaranteed approval” but require an upfront fee for processing, which is a red flag.

How to Recognize This Scam:

They promise guaranteed approval for loans or credit cards.
They may ask for upfront fees before processing your request.
The caller may pressure you to make quick decisions.

What You Can Do:

Avoid paying any upfront fees.
Verify the legitimacy of the offer by contacting the company directly.
Report the number to WhoCalledMe and ICO.

01915433407: Robocalls and Scams

This number, 01915433407, has been reported for robocalls promoting various services, from insurance to debt management. The call may also claim to be related to health insurance or other government-related services.

How to Recognize This Scam:

Automated calls that offer insurance, loans, or other services.
The call may ask you to provide personal information to receive a “quote.”
The urgency in the message is often a tactic to pressure you.

What You Can Do:

Report the number to TrueCaller and block it on your phone.
Never share personal or financial information over the phone.

01792722635: Loan & PPI Scams

The number 01792722635 has been flagged for its involvement in payday loan or PPI (Payment Protection Insurance) scams. Often, callers claim that the victim is eligible for a loan or is owed compensation for a mis-sold financial product, but the ultimate goal is to extract personal or financial information.

How to Recognize This Scam:

The caller claims you’re entitled to a loan or PPI refund.
They may ask for sensitive information to process the claim.
They often pressure you into acting quickly.

What You Can Do:

Hang up if the call seems suspicious.
Report the number to TPS and block it on your device.

01223609721: Telemarketing Scams

The number 01223609721 is frequently reported as a telemarketing scam. In most cases, the callers offer fake products, services, or surveys in exchange for payment details. The main aim is to gather financial information and make fraudulent charges.

How to Recognize This Scam:

Offers for products or services that seem too good to be true.
The call is unsolicited and often involves high-pressure tactics.
The caller might ask for credit card or bank details.

What You Can Do:

Report the call to Ofcom and block the number.
Use TrueCaller to identify and block unwanted calls.

Conclusion: Protect Yourself from Spam Calls

Scammers and fraudulent callers are continuously adapting to trick individuals into parting with their hard-earned money. The best way to protect yourself from these top reported spam phone numbers is to be cautious, block suspicious numbers, and report them to the relevant authorities. Tools like TrueCaller, WhoCalledMe, and ICO can be extremely helpful in identifying and combating spam calls.

Always remember to verify unknown numbers, especially if the call involves financial transactions or requests for personal details. With the right precautions, you can reduce the risk of falling victim to phone scams in the UK.