Top Reported Spam Phone Numbers in the UK (2025)

Telemarketing calls, robocalls, and unsolicited messages have long been a nuisance for phone users in the UK. In 2025, the rise of spam and scam phone numbers has only intensified, making it crucial to keep track of these suspicious numbers. If you’ve received calls from unknown numbers, you’re not alone! Many people are reporting phone numbers that harass or try to scam them. Here’s a breakdown of the Top Reported Spam Phone Numbers in the UK (2025), including details about each number, why they’re flagged as spam, and what you can do to protect yourself.

Quick Overview of the Problem

The rise of spam phone numbers is one of the leading annoyances for mobile users in the UK. According to reports from tools like TrueCaller, WhoCalledMe, Ofcom, and others, many users are bombarded with calls from unknown numbers offering dubious services, such as fake prizes, financial scams, or even attempts at identity theft.

How to Identify Spam Calls

Unknown Caller: If you don’t recognize the number, it’s wise to be cautious.
Recorded Messages: Automated messages are often a sign of spam.
Too Good to Be True Offers: Fraudsters typically offer you something “too good to be true” over the phone.
Persistent Calls: If the same number keeps calling repeatedly, it could be a scammer.

Why Are These Numbers Flagged?

The phone numbers in this list have been reported by numerous users for being involved in spam or fraudulent activity. Many people have complained about these numbers attempting to sell products, offer fake services, or trick people into sharing personal information.

Let’s dive into the details of the Top Reported Spam Phone Numbers in the UK (2025):

Table: Top Reported Spam Phone Numbers (2025)

Phone Number	Reported Activity	Possible Scam Type	Common Reports
2039301824	Persistent calls offering loans	Loan fraud or debt consolidation	Frequent, aggressive calls, fake loan offers
1615263553	Automated robocall about health insurance	Health insurance scam	Fake health coverage claims
1792722689	Prizes and giveaways calls	Lottery or prize scam	Claims of winning large sums
2045876705	Debt collection threats	Fake debt collection scam	Threats of legal action for non-existent debt
1273036584	Survey or market research calls	Fake survey scam	Asking for personal info for supposed surveys
3301240997	Suspicious caller with heavy accents	Pretending to be government representatives	Tax or benefits scam
1413109863	Calls regarding energy bill reductions	Energy-saving scam	Fake offers of cheaper energy plans
2038960345	Automated message about bank security	Bank or account phishing	Trying to steal banking details
1544329840	Fake prize notification	Prize scam	Claims you’ve won a lottery or contest
7714135818	Offering financial services or investments	Investment or financial scam	Promises of high returns, risky investments

2039301824: Loan Fraud and Debt Consolidation Scam

This number has been flagged for repeatedly calling individuals and offering fraudulent loan services. These calls often involve aggressive sales pitches about personal loans, debt consolidation, or credit repair services. While these offers may sound appealing, they usually ask for personal details such as bank information or upfront fees before providing any actual service. If you get a call from this number, it’s best to ignore it and report it to WhoCalledMe or TrueCaller.

Red Flags:

Requests for upfront payments before processing loans.
Promises of guaranteed loan approval, even with poor credit.
Poor language skills and unprofessional behavior on the phone.

How to Protect Yourself:

Never provide sensitive financial information over the phone.
Block this number and report it to Ofcom.
Use trusted loan comparison websites and avoid unsolicited offers.

1615263553: Health Insurance Scam

This number has been reported for making robocalls offering health insurance plans. The automated system often claims to help people with private health insurance, offering deals that sound too good to be true. These types of scams typically collect personal data, including health and financial details, and may even attempt to charge you for non-existent insurance plans.

Red Flags:

Claims of affordable or free health insurance.
High-pressure tactics to make immediate decisions.
Automated voice asking for personal or health-related information.

How to Protect Yourself:

Hang up immediately if the call is from an automated system.
Don’t share any personal information without verifying the legitimacy of the caller.
Use TrueCaller to identify and block the number.

1792722689: Lottery or Prize Scam

One of the most common scams, this number is involved in calling individuals to claim they’ve won a lottery or prize. These callers often use emotional manipulation, claiming you’ve won a large sum of money or a prize, but you’ll need to pay a fee or provide banking details to collect it. The scam often involves high-pressure tactics to get you to act quickly.

Red Flags:

Claims of winning a large sum of money or expensive prizes.
Requests for payment upfront to claim your prize.
Pressure to act quickly, often accompanied by a deadline.

How to Protect Yourself:

Remember: You cannot win a prize you didn’t enter.
Do not pay any fees or provide bank details.
Report the number to WhoCalledMe.

2045876705: Fake Debt Collection

This phone number is linked to scammers impersonating debt collectors. They often claim that you owe money to a company or face legal action unless you pay immediately. These calls can be threatening and intimidating, causing distress for those who may have no debt at all. If you ever receive a call like this, you should verify the debt before making any payments.

Red Flags:

Threats of legal action or arrest for non-existent debt.
Requests for immediate payment via wire transfer or gift cards.
Pressure to provide personal details and payment information.

How to Protect Yourself:

Do not give any information over the phone unless you are sure of the caller’s identity.
Contact the company directly if they claim you owe money.
Block the number using TrueCaller.

1273036584: Fake Survey Scam

This number is associated with callers claiming to conduct surveys in exchange for prizes or incentives. These surveys often ask for personal information such as your date of birth, address, and other sensitive data. While some surveys are legitimate, many of these are phishing attempts designed to harvest your personal information.

Red Flags:

Unsolicited surveys or offers for prizes.
Requests for private information during the survey.
Aggressive follow-up calls after the initial survey.

How to Protect Yourself:

Never participate in surveys that ask for personal or financial information.
Report the number to WhoCalledMe and block it immediately.
Use TrueCaller to identify and reject spam calls.

3301240997: Government Impersonation Scam

Scammers using this number claim to be representatives of the UK government, often targeting vulnerable individuals with promises of tax refunds, grants, or benefits. The callers may threaten legal action if you don’t act immediately or may ask for payment to process benefits or refunds.

Red Flags:

Claims to be from government agencies like HMRC.
Requests for payment or personal details to process refunds.
Threats of arrest or legal action if you don’t comply.

How to Protect Yourself:

Remember that HMRC and other government agencies will never ask for payment over the phone.
Hang up and contact the agency directly using their official contact number.
Block this number through TrueCaller.

1413109863: Energy Scam

Calls from this number often claim to offer discounts or better deals on energy bills. These calls typically involve promises of energy-saving plans or offers to help you reduce your energy consumption. However, the intention is usually to get you to sign up for a service that may not exist or comes with hidden fees.

Red Flags:

Promises of significant savings on energy bills.
High-pressure sales tactics and immediate action requests.
Unsolicited offers and requests for personal details.

How to Protect Yourself:

Never share your energy account details over the phone.
Research energy providers independently, using comparison sites.
Block this number and report it to Ofcom.

2038960345: Bank Phishing Scam

A number commonly used by scammers posing as bank representatives, this phone number often calls individuals claiming there has been suspicious activity on their accounts. The scammer will ask for sensitive information, such as bank account numbers or PINs, to “verify” your identity.

Red Flags:

Claims of suspicious activity on your bank account.
Requests for your bank account or card details over the phone.
Urgent pressure to act or verify information immediately.

How to Protect Yourself:

Do not provide any personal details or banking information over the phone.
Contact your bank directly using the official contact number.
Report the number to TrueCaller.

1544329840: Prize Scam

Another common scam, this number attempts to convince you that you’ve won a lottery or a large sum of money. Similar to other prize scams, the caller will ask for payment or personal information to claim your prize. It’s all a scam designed to steal your money.

Red Flags:

Claims you’ve won a prize or a large sum of money.
Requests for payment to claim the prize.
Emotional manipulation to get you to act fast.

How to Protect Yourself:

If you didn’t enter a contest, you didn’t win.
Do not send money or give out personal information.
Report the number to WhoCalledMe.

7714135818: Financial Investment Scam

This number has been flagged for offering “too good to be true” investment opportunities, promising quick returns. The scam often involves high-risk or non-existent investment opportunities, aiming to get you to part with your money.

Red Flags:

Promises of high, quick financial returns.
Requests for large sums of money to secure “investments.”
Pushing you into making decisions quickly without time to think.

How to Protect Yourself:

Research investment opportunities thoroughly before committing.
Don’t send money without confirming the legitimacy of the offer.
Block the number using TrueCaller.

Conclusion

Spam and scam phone numbers continue to be a persistent problem in the UK, and with scammers constantly evolving their tactics, it’s crucial to stay vigilant. If you receive a call from any of the numbers listed above, it’s best to block them immediately, report them to trusted authorities, and protect your personal information.

Remember, if it sounds too good to be true, it probably is! Stay safe by using tools like TrueCaller, WhoCalledMe, and Ofcom to verify numbers and avoid falling victim to scams.

Call to Action:

If you’ve received calls from any of these numbers or suspect other numbers might be spam, make sure to report them and block them using available tools. Stay aware and protect yourself from fraud!