Spam calls have become a persistent nuisance in the UK, with scammers constantly evolving their tactics to trick unsuspecting individuals. These calls can range from fake bank alerts to fraudulent prize notifications, making it crucial to stay informed. In 2025, several phone numbers have emerged as frequent offenders, generating numerous complaints and raising widespread concern. This guide covers the top reported spam phone numbers in the UK for 2025, helping you recognize and avoid these unwanted interactions.
Why You Should Watch Out for These Numbers
Receiving calls from unknown numbers can be frustrating, but some can be more than just a nuisance. Scam callers often aim to steal your personal or financial information, deceive you into paying fake debts, or lure you into subscribing to unnecessary services. Recognizing these numbers can help protect yourself and others.
Top Reported Spam Phone Numbers in the UK (2025)
Below is a table summarizing some of the most frequently reported spam numbers in the UK this year, along with the typical tactics these callers use:
| Phone Number | Common Scam Type | Caller Behavior |
| 01977 788417 | Fake Insurance Claims | Repeated, aggressive calls promoting fake insurance policies |
| 02045792608 | Tech Support Scams | Pretends to be from Microsoft or other tech companies |
| 02039277564 | Debt Collection Scams | Demands immediate payment for fake debts |
| 01865950244 | Fake HMRC Calls | Claims to be from HMRC, threatening legal action |
| 08008620271 | Energy Tariff Scams | Pushes fake energy deals, often aggressive |
| 02039676770 | Investment Fraud | Promises high returns on fake investment schemes |
| 03316303353 | Phishing and Personal Info Theft | Asks for sensitive personal or banking information |
| 03301244030 | Robocall Scams | Automated messages claiming account issues |
| 02037589440 | Courier Delivery Scams | Claims to have a package that needs immediate payment |
| 02070434505 | Bank Impersonation Scams | Pretends to be from a major bank, asks for account details |
Detailed Analysis of the Top Spam Numbers
1. 01977 788417 – Fake Insurance Claims
This number has been frequently reported for aggressively pushing fake insurance policies. Callers often pretend to be from well-known insurers and use high-pressure tactics to make people share personal and financial information. If you receive a call from this number, it’s best to hang up and block it immediately.
2. 02045792608 – Tech Support Scams
Often pretending to be from companies like Microsoft, these callers claim your computer has a virus or security issue. They then try to trick you into installing malware or paying for fake services. Avoid sharing any technical information over the phone.
3. 02039277564 – Debt Collection Scams
This number is linked to fake debt collection attempts, where callers threaten legal action unless immediate payment is made. Always verify any outstanding debts directly with the institution before making payments.
4. 01865950244 – Fake HMRC Calls
Posing as representatives from HMRC, these callers try to scare you into paying fake tax debts or disclosing sensitive information. Remember, HMRC will never threaten you with arrest over the phone.
5. 08008620271 – Energy Tariff Scams
This number is known for pushing dubious energy deals, often targeting vulnerable individuals with aggressive sales tactics. It’s safer to compare energy deals independently through trusted platforms.
6. 02039676770 – Investment Fraud
Promising high returns with little risk, this number is linked to fraudulent investment schemes. Be cautious of any unsolicited investment offers, as legitimate firms rarely cold-call potential clients.
7. 03316303353 – Phishing and Personal Info Theft
These calls aim to gather sensitive information like bank details, passwords, or National Insurance numbers. Always verify the identity of the caller before sharing any personal data.
8. 03301244030 – Robocall Scams
This number has been reported for sending automated calls that claim your account has been compromised. Never respond to these prompts; instead, contact the company directly to confirm any issues.
9. 02037589440 – Courier Delivery Scams
These scammers claim you have a package that requires immediate payment for delivery. Avoid making payments unless you can verify the legitimacy of the delivery.
10. 02070434505 – Bank Impersonation Scams
Pretending to be from major UK banks, these callers try to trick people into revealing account details. Always use the official contact numbers listed on your bank’s website to verify such claims.
How to Protect Yourself
- Block the Numbers – Use your phone’s built-in blocking feature or third-party apps.
- Register with TPS – Add your number to the Telephone Preference Service to reduce unwanted calls.
- Report the Call – Use platforms like WhoCalledMe, TrueCaller, and Ofcom to report spam numbers.
- Be Skeptical – Never share personal information without verifying the caller’s identity.
- Educate Others – Share this list with friends and family to keep them safe.
Report and Block These Numbers
If you receive calls from these numbers, make sure to report them to the appropriate authorities like Ofcom, TPS, and the ICO. Blocking these numbers can also prevent future nuisance calls.
Final Thoughts
Spam calls remain a significant challenge, but by staying alert and informed, you can protect yourself from falling victim to these scams. Use the resources available, block suspicious numbers, and educate those around you to create a safer communication environment in 2025.
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Discover the top reported spam phone numbers in the UK (2025), including 01977 788417, 02045792608, 02039277564, 01865950244, 08008620271, 02039676770, 03316303353, 03301244030, 02037589440, and 02070434505. Learn how to identify and block these nuisance calls to protect your privacy and stay safe.
