Spam phone calls continue to be a major nuisance across the UK, with thousands of people receiving unsolicited calls every day. Whether it’s a fake insurance claim, a bogus tech support agent, or an automated voice demanding urgent payments, spam calls are not just irritating—they can be dangerous. Scammers are constantly evolving their tactics to deceive victims, making it critical to stay informed.
In 2025, several phone numbers have emerged as the most reported spam callers in the UK. These numbers have been flagged by thousands of users across various call reporting platforms such as WhoCalledMe, Truecaller, and TPS (Telephone Preference Service).
Below is a detailed table of the Top 10 Most Reported Spam Numbers in the UK (2025), followed by specific descriptions of each one, based on user reports and call behavior.
Top 10 Reported Spam Numbers in the UK (2025)
| Rank | Phone Number | Reported Type | Common Scam Type | Risk Level | User Reports |
| 1 | 01738 408739 | Robocall / Fake Authority | HMRC / Tax Fraud Scam | High | 3,200+ |
| 2 | 01977 788417 | Live Scam Call | Bank Account Fraud Alert | Very High | 2,950+ |
| 3 | 01274 041023 | Automated Message | Energy Bill Reduction | Medium | 2,500+ |
| 4 | 01792 722617 | Robocall | Internet Disconnection | High | 2,350+ |
| 5 | 0161 820 1220 | Spoofed UK Number | Amazon Package Scam | High | 2,150+ |
| 6 | 0331 630 9046 | Unregistered VoIP | Loan Offer Scam | Very High | 2,000+ |
| 7 | 0191 823 9030 | Spoofed Newcastle Number | Credit Card Fraud Alert | High | 1,850+ |
| 8 | 01388 224992 | Local Scam Call | Insurance Claims | Medium | 1,700+ |
| 9 | 01204 935816 | Auto Dialer | Investment Opportunities | Medium | 1,600+ |
| 10 | 01438 382070 | Recorded Message | Debt Collection Scam | High | 1,500+ |
1. 01738 408739 – Fake HMRC Robocall
This number, originating from the Perth area, has been widely reported for impersonating HMRC (Her Majesty’s Revenue and Customs). Victims receive an automated voice message claiming that there is a legal case against them for unpaid taxes. The message typically pressures the recipient to “press 1” to speak to an officer or face legal consequences.
Advice: HMRC does not make automated threatening calls. Hang up immediately and report the number to Action Fraud.
2. 01977 788417 – Bank Account Fraud Alert Scam
Reported as one of the most dangerous spam calls of 2025, this number falsely claims to be from major UK banks like HSBC, Barclays, or Lloyds. The scam involves an urgent alert that the victim’s account has been compromised. The scammer then asks for personal banking credentials to “secure the account.”
Advice: No legitimate bank will ask for full PINs or passwords over the phone. End the call and contact your bank through official channels.
3. 01274 041023 – Energy Bill Discount Scam
This Bradford number has been linked to calls promoting suspicious “government energy bill discounts.” The callers often claim to represent a government energy efficiency initiative and ask for your utility account numbers to process a rebate.
Advice: Verify all claims about government support through the official GOV.UK website before sharing information.
4. 01792 722617 – Internet Service Provider Scam
Posing as BT, Sky, or Virgin Media, this Swansea number claims there is a “problem with your broadband.” Victims are asked to download remote desktop software like AnyDesk or TeamViewer, giving scammers full access to the computer.
Warning: Never allow remote access to unknown callers. ISPs do not contact customers this way unless previously arranged.
Check Recent Spamming Numbers:
2031376317: : 1258588702: : 1772342898: : 2031376317: : 3330038533
5. 0161 820 1220 – Amazon Package Delivery Scam
Using a Manchester dialing code, this number sends a recorded message claiming that an Amazon package could not be delivered or that there is a charge pending. The message asks the user to press a number to reschedule or speak to an “Amazon agent,” who then asks for personal info.
Advice: Amazon will not call customers from local UK numbers. Verify your delivery status via the official app or website.
6. 0331 630 9046 – Loan and Finance Offer Scam
This number often uses VoIP lines, which makes it harder to trace. It is widely reported for promoting suspicious loan offers and financial services. Many calls claim to be from FCA-registered institutions, which turn out to be fake.
Advice: Check the FCA register for any financial company before discussing money or sharing documents.
7. 0191 823 9030 – Fake Credit Card Fraud Alert
This number is associated with credit card fraud warnings that sound legitimate. The scammer pretends to represent Visa or Mastercard’s fraud team and states that your card has been used for suspicious activity. They then ask for your card number to “verify.”
Advice: Credit card companies do not ask for card details over the phone. Hang up and call the number on the back of your card.
8. 01388 224992 – Fake Insurance Claims
Users report receiving calls from this County Durham number related to bogus car accident claims or PPI compensation. The caller often insists that you’ve been in an accident recently and that you are entitled to compensation.
Advice: If you haven’t had an accident, this is a clear red flag. Hang up and block the number.
9. 01204 935816 – Investment and Crypto Scam
This number targets victims with promises of high-return investments, often tied to cryptocurrency or foreign exchange markets. They often impersonate legitimate trading platforms or brokers and try to get people to transfer funds to overseas accounts.
Advice: Be wary of any investment promising “guaranteed” returns. Check FCA warnings for unregulated companies.
10. 01438 382070 – Fake Debt Collection Call
This Stevenage number is often reported for aggressive debt collection calls. Victims are threatened with court action over unpaid debts, which are often fictitious. The caller pressures victims to pay using prepaid cards or direct transfer.
Advice: Do not make payments to unknown collectors. Ask for written proof and verify the claim through your financial institution.
Why Are These Numbers Still Active?
Many of these spam calls are made using VoIP (Voice over Internet Protocol) or spoofed numbers, making them difficult to trace or block at the network level. Scammers often rotate or reroute numbers, meaning even blocked numbers can reappear under different IDs.
This is why it’s important to stay vigilant and report any suspicious calls. Each report helps build a larger picture for telecom providers and law enforcement to take action.
What to Do if You Receive a Spam Call
Here are some essential tips for dealing with spam phone calls:
- Don’t Answer Unknown Numbers: Let them go to voicemail. Legitimate callers will leave a message.
- Never Share Personal Information: Especially bank details, National Insurance numbers, or passwords.
- Don’t Press Any Buttons: Pressing numbers can lead to more calls or hidden charges.
- Report the Call: Use services like TPS, Ofcom, or Action Fraud.
- Block and Label: Use your phone’s spam blocking tools or apps like Truecaller and Hiya.
- Enable Do Not Disturb Modes: Many smartphones allow you to silence calls from unknown numbers.
How You Can Help Others
- Leave reviews on call identification platforms
- Share warnings with family and friends
- Stay informed on the latest scam tactics
Every report counts. Your vigilance can protect someone else from falling victim to a scam.
Final Thoughts
The battle against spam and scam calls is far from over, but awareness is our first line of defense. The numbers listed in this article represent only a fraction of the thousands of spam calls plaguing the UK each day. As scammers get more creative, we must get more cautious.
By staying updated, reporting suspicious activity, and sharing information with others, we can make the UK a harder target for phone scammers in 2025 and beyond.
