Spam calls have become an increasingly serious problem in the United Kingdom, causing disruption, financial scams, and general frustration among mobile and landline users. In 2025, reports of unsolicited calls have surged, with scammers deploying ever more sophisticated techniques to lure victims into their traps.
From false tax investigations to fake delivery notices, scammers use a wide variety of ploys to deceive unsuspecting individuals. The UK government and telecom providers have ramped up efforts to combat the issue, but it remains critical that individuals stay informed about the most common spam numbers in circulation.
In this article, we will provide an in-depth analysis of the top reported spam phone numbers in the UK for 2025, focusing on the nature of the calls, the most frequent complaints, and how to protect yourself from falling victim.
Table of Top Reported Spam Numbers in the UK – 2025
| Phone Number | Type of Spam Call | Common Ploy | Risk Level | Caller ID Displayed |
| 020 3930 1824 | HMRC Tax Scam | Fake tax evasion threats | High | London |
| 0161 526 3553 | Energy Supplier Scam | Fake energy discounts | Medium | Manchester |
| 01792 722689 | Courier Delivery Scam | Missed delivery with malicious link | High | Swansea |
| 020 4587 6705 | Investment Fraud | Cryptocurrency or stock investments | High | London |
| 01273 036584 | Insurance Renewal Scam | Fake car/home insurance offers | Medium | Brighton |
| 0330 124 0997 | Broadband Provider Spoofing | Claims to be from BT/Virgin | High | Non-geographic |
| 0141 310 9863 | Bank Impersonation Scam | Claims account is at risk | Critical | Glasgow |
| 020 3896 0345 | International Tech Support | Offers to fix fake computer issues | High | London |
| 01544 329840 | Pension Scheme Fraud | Pressure to transfer pension funds | High | Kington |
| 07714 135818 | Mobile SMS Scam | Fake Royal Mail / Bank texts | High | Mobile |
020 3930 1824 – The HMRC Tax Scam
One of the most persistent and dangerous spam numbers reported in 2025 is 020 3930 1824, often used to impersonate Her Majesty’s Revenue and Customs (HMRC). The caller usually claims that you are under investigation for tax evasion or that a legal case has been opened against you.
Common Tactics:
- Automated voice messages.
- Threats of arrest if payment isn’t made.
- Requests for payment via gift cards or cryptocurrency.
Advice:
- HMRC never demands immediate payment over the phone.
- Hang up immediately and report the number via the Action Fraud website.
0161 526 3553 – The Energy Discount Scam
The number 0161 526 3553 has been associated with fraudulent energy discount offers. This Manchester-based number targets homeowners by claiming to offer substantial discounts on energy bills, especially amid the ongoing cost of living crisis.
Common Tactics:
- Posing as an Ofgem representative.
- Offering “limited-time deals” to switch energy providers.
- Requesting personal banking details for “payment setup.”
Advice:
- Always verify with your energy provider.
- Do not give out your account number or sort code over the phone.
01792 722689 – Courier Delivery Scam
The Swansea-based number 01792 722689 frequently appears in scams related to missed parcel deliveries. Victims often receive calls or follow-up messages after they click on a malicious link in an SMS.
Common Tactics:
- Pretends to be from Royal Mail, DPD, or Hermes.
- Claims there’s a fee or customs charge on a parcel.
- Directs victims to phishing websites that collect payment info.
Advice:
- Check tracking details directly from official courier websites.
- Never pay fees through unknown links sent by text.
Check Recent Spamming Numbers:
1258588702: : 2030340147: : 2870024945: : 2034752474: : 1484599876
020 4587 6705 – Investment & Crypto Scam
This London-based number has been a recurring offender in fraudulent investment schemes. Callers often offer “inside tips” on cryptocurrencies or high-yield stock investments.
Common Tactics:
- Pressure to act fast before the “window closes.”
- Use of fake success stories and investment dashboards.
- Requests to deposit money into offshore or unregulated accounts.
Advice:
- Always verify credentials with the FCA (Financial Conduct Authority).
- Never invest based on an unsolicited phone call.
01273 036584 – Insurance Renewal Scam
Brighton number 01273 036584 has been used in fake car or home insurance scams. The caller claims that your insurance is about to lapse and offers a renewal on the spot with a discounted premium.
Common Tactics:
- Asks for debit/credit card details immediately.
- Claims they’re from major insurance brands like Aviva, AXA, or Direct Line.
- Offers to “beat your current premium.”
Advice:
- Contact your insurer directly if you get such a call.
- Do not make payments or confirm identity with cold callers.
0330 124 0997 – Broadband Spoofing Scam
0330 124 0997 is a non-geographic number often used in broadband-related scams. Scammers impersonate providers like BT, Sky, or Virgin Media, saying there’s a fault in your internet connection.
Common Tactics:
- Asks for remote desktop access (via apps like AnyDesk or TeamViewer).
- Claims your router has been hacked or infected.
- Demands a security payment to “fix” the problem.
Advice:
- Never allow remote access unless you are 100% sure of the caller’s identity.
- Hang up and call your ISP directly.
0141 310 9863 – Bank Fraud Impersonation
The Glasgow-based number 0141 310 9863 is especially dangerous. It’s associated with scammers posing as representatives from Lloyds, Barclays, or HSBC, claiming there’s fraudulent activity on your account.
Common Tactics:
- Encourages you to move money to a “safe account.”
- May spoof the real bank number using caller ID tricks.
- Can include follow-up texts or emails to look more convincing.
Advice:
- Banks never ask you to transfer funds to “secure accounts.”
- End the call and use the number on your bank card to call back.
020 3896 0345 – Fake Tech Support Call
London number 020 3896 0345 has been widely used in fake tech support scams. Often claiming to be from Microsoft, Apple, or Norton, they offer help for “detected viruses” on your system.
Common Tactics:
- Requests remote access to your PC or phone.
- Claims malware has been found from suspicious IP activity.
- Charges you for fake antivirus software.
Advice:
- Real tech companies do not make unsolicited support calls.
- Disconnect and run antivirus scans yourself.
01544 329840 – Pension Scheme Fraud
This number from Kington (Herefordshire) is linked to fraudsters targeting elderly or retired individuals. It involves fake pension advice or fake government initiatives urging people to move their pension funds.
Common Tactics:
- Claims that your pension is at risk due to inflation or new laws.
- Offers a “free pension review” with a licensed advisor.
- Requests sensitive documents or account access.
Advice:
- Consult with an independent financial advisor (IFA) before any pension decisions.
- Report suspicious pension advice to the Pensions Regulator.
07714 135818 – Mobile Text and SMS Fraud
This mobile number is linked to multiple SMS scams. It often pretends to be from banks or delivery services, including fake links directing users to phishing websites.
Common Tactics:
- “You have a new message from Barclays/Royal Mail.”
- Links disguised as genuine websites but with subtle spelling changes.
- Attempts to harvest login credentials or card numbers.
Advice:
- Never click on links from suspicious SMS messages.
- Check with the actual institution or delivery service first.
How to Protect Yourself from Spam Calls
With the rise in spam calls, it’s more important than ever to take proactive steps to protect your information and finances. Here are practical ways to do that:
Use Call Blocking Apps:
Apps like Hiya, Truecaller, and RoboKiller can help identify and block spam numbers automatically.
Register with TPS:
Register your number with the Telephone Preference Service (TPS) to reduce unwanted sales calls.
Report Suspicious Calls:
Use sites like WhoCalledMe.co.uk, Action Fraud, or the ICO to report scam calls.
Don’t Engage:
If you’re unsure of the caller’s identity, hang up. Don’t provide personal information or financial details.
Use Two-Factor Authentication:
Enable 2FA on your bank accounts and key services to prevent unauthorized access.
Final Thoughts
The above list highlights just a sample of the most frequently reported spam numbers in the UK for 2025. As scammers continue to evolve, staying informed and vigilant remains the best defense. Always trust your instincts—if a call feels suspicious, it probably is.
Sharing information about known scam numbers, such as the ones listed here, helps protect your friends, family, and community. Knowledge is your first line of defense in a digital world full of increasingly clever fraudsters.
