
Spam calls continue to be a major nuisance for millions of UK 3301240410 residents each year. In 2025, the situation remains challenging as scammers use increasingly sophisticated tactics to trick people into sharing personal information, making payments, or installing harmful software. To help you stay safe, we’ve compiled a list of the top reported spam phone numbers in the UK for 2025, including detailed information on each number, common complaints, and tips for protecting yourself.
Why You Should Be Wary of Unknown Numbers
Receiving unexpected calls from unknown numbers can be concerning, especially if the caller seems persistent or tries to pressure you into making quick decisions. Many of these calls are from fraudsters using tactics like phishing, tech support scams, or fake prize giveaways to steal your money or personal information. It’s crucial to stay alert and informed about the numbers most commonly associated with these scams.
Top Reported Spam Numbers in 2025
Here’s a quick overview of some of the most frequently reported spam numbers in the UK this year:
Phone Number | Category | Common Complaints | Risk Level |
1234247239 | Tech Support Scam | Fake Microsoft support, malware threats | High |
1388436857 | Financial Scam | Loan offers, investment fraud | High |
3316309077 | Robocalls | Automated messages, fake surveys | Medium |
3301240410 | Phishing | Personal info requests, fake banking calls | High |
1708956207 | Energy Scam | Fake energy rebate offers | Medium |
1204565865 | Prize Scam | Fake lottery wins, prize draws | High |
2080444031 | Government Impersonation | Fake HMRC tax warnings | High |
1656337649 | Insurance Scam | Fake accident claims, PPI refunds | Medium |
1218241090 | Charity Fraud | Fake donation requests | Medium |
3316307811 | Subscription Trap | Unsolicited subscriptions, hidden fees | Medium |
1234247239 – Tech Support Scam
This number is often associated with tech support scams where callers pose as Microsoft representatives, claiming that your computer is infected with malware. They typically pressure victims into downloading remote access software, allowing them to steal sensitive information or install malicious programs. If you receive a call from this number, hang up immediately and avoid sharing any personal information.
1388436857 – Financial Scam
Many people have reported this number being used for financial scams, including fake loan offers and investment fraud. Scammers often promise guaranteed returns or low-interest loans to trick people into sharing their bank details. Remember, legitimate financial institutions never ask for sensitive information over the phone.
3316309077 – Robocalls
Automated calls from this number are commonly reported, often pushing fake surveys or promotional offers. These robocalls are typically used to gather personal information for future scams. Be cautious and avoid interacting with these messages.
3301240410 – Phishing
This number is linked to phishing attempts, where callers pose as representatives from banks or other financial institutions, asking for account details or passwords. Always verify the caller’s identity through official channels before sharing any information.
1708956207 – Energy Scam
Scammers using this number often claim to offer energy rebates or reduced rates to trick people into sharing personal information. Be wary of unsolicited energy offers, especially if the caller pressures you to act quickly.
1204565865 – Prize Scam
This number is frequently reported for fake prize or lottery scams, where callers inform you of a large win that requires upfront payment or personal details to claim. Avoid falling for this common trick by remembering that legitimate prizes never require payment.
2080444031 – Government Impersonation
Fraudsters using this number often pose as government officials, such as HMRC agents, threatening arrest or fines for unpaid taxes. These calls can be very convincing, but remember that real government agencies never demand payment over the phone.
1656337649 – Insurance Scam
This number is often associated with fake accident claims or PPI refund scams. Scammers typically pressure you into confirming personal details to process a supposed claim. Always verify the legitimacy of such calls before sharing any information.
1218241090 – Charity Fraud
Scammers using this number often pose as representatives of fake charities, appealing to your generosity with emotional stories. Always verify the legitimacy of charities before donating over the phone.

3316307811 – Subscription Trap
Many people report this number being linked to unwanted subscriptions or hidden fees. Scammers often lure victims with free trials that quickly turn into expensive ongoing charges.
How to Protect Yourself from Scam Calls
- Use call-blocking apps like TrueCaller or WhoCalledMe to filter spam numbers.
- Register your number with the TPS (Telephone Preference Service) to reduce unwanted calls.
- Report suspicious numbers to Ofcom, TPS, or the ICO for investigation.
- Never share personal or financial information over the phone.
- Be cautious with unknown numbers and avoid responding to suspicious texts or calls.
Final Thoughts
Staying vigilant is the best defense against phone scams. If you receive calls from these numbers or others that seem suspicious, don’t hesitate to block and report them. Together, we can reduce the impact of these scams and protect ourselves from fraud.
Frequently Asked Questions
- How do I block a spam number in the UK?
You can block a number using your phone’s settings or a call-blocking app like TrueCaller. - How can I verify if a number is legitimate?
Use services like WhoCalledMe or TrueCaller to check the caller’s identity. - What should I do if I accidentally shared my personal details?
Contact your bank or financial institution immediately to secure your accounts. - Can I report scam calls to the police?
Yes, you can report them to Action Fraud or your local police if the scam is serious. - Why are spam calls increasing in 2025?
Scammers are using more sophisticated technologies and social engineering tactics to reach potential victims.
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