Spam and scam calls have become a major concern for individuals and businesses across the UK. As technology advances, so do the tactics of scammers, making it crucial to stay informed about the most reported spam phone numbers in 2025. In this guide, we’ll break down the top 10 most flagged numbers, their potential risks, and how to protect yourself from unwanted calls.
Quick Overview
Spam calls can range from harmless marketing attempts to dangerous scams aimed at stealing personal information. Here are some of the most commonly reported spam numbers in the UK this year:
| Phone Number | Category | Common Complaint | Likely Origin |
| 1887224460 | Scam | Fake insurance, aggressive sales | Unknown |
| 2843729360 | Fraud | Financial fraud attempts | Overseas |
| 7520619034 | Marketing | Unwanted marketing calls | UK |
| 1615241776 | Scam | Debt collection scams | Manchester |
| 1743817282 | Phishing | Bank phishing attempts | Unknown |
| 1942901396 | Fraud | Prize scam, lottery fraud | Unknown |
| 3301240404 | Scam | Tech support scam | London |
| 3316303321 | Fraud | Financial scam, fake investments | UK |
| 3333035419 | Scam | Automated scam calls | UK |
| 1615317256 | Scam | Fake HMRC tax threats | Manchester |
Why These Numbers Are Dangerous
Each of these numbers has been linked to various types of scams and fraudulent activities. While some may simply be annoying marketing calls, others are more sinister, using sophisticated social engineering tactics to trick you into revealing personal information or making unauthorized payments.
Common Tactics Used by Scammers
- Phishing: Pretending to be a bank or government agency to steal personal information.
- Tech Support Scams: Claiming to fix non-existent problems on your devices for a fee.
- Debt Collection Scams: Threatening legal action for fake debts.
- Prize and Lottery Scams: Promising large rewards in exchange for upfront payments or personal information.
How to Protect Yourself
Given the rise in these scams, it’s essential to stay vigilant:
- Use Call Blocking Apps: Tools like TrueCaller and WhoCalledMe can help identify and block spam numbers.
- Register with TPS: Adding your number to the Telephone Preference Service (TPS) can reduce unwanted marketing calls.
- Report Scams: Use platforms like Ofcom, the ICO, and the NCSC to report suspicious numbers.
- Never Share Personal Info: Avoid sharing personal or financial details over the phone unless you are certain of the caller’s identity.
- Stay Informed: Regularly check for updates on reported scam numbers to avoid new threats.
Detailed Analysis of Each Number
1887224460 – Fake Insurance Scams
This number has been linked to aggressive sales tactics for fake insurance policies, often targeting vulnerable individuals. Reports indicate that callers using this number often pressure victims into purchasing worthless coverage.
2843729360 – Financial Fraud Attempts
Many people have reported this number for trying to obtain sensitive financial information. Often disguised as a bank or financial service, these calls can be highly deceptive and dangerous.
7520619034 – Persistent Marketing Calls
While not necessarily malicious, this number has been flagged for excessive telemarketing. If you’re tired of endless product promotions, consider blocking this number.
1615241776 – Debt Collection Scams
Originating from Manchester, this number has been used in debt collection scams, threatening legal action for debts that don’t exist.
1743817282 – Bank Phishing Attempts
This number is often associated with phishing scams where the caller pretends to be your bank, attempting to trick you into revealing account details.
1942901396 – Prize and Lottery Fraud
Reports suggest this number is used in prize and lottery scams, promising big wins in exchange for upfront fees.
3301240404 – Tech Support Scams
This London-based number has been linked to fake tech support scams, where callers claim to fix non-existent computer issues for a fee.
3316303321 – Financial Scams
This number has been reported for financial scams, including fake investment schemes that target unsuspecting investors.
3333035419 – Automated Scam Calls
Automated calls from this number often claim to offer financial services but are usually just a setup for a larger scam.
1615317256 – HMRC Tax Threat Scams
This Manchester-based number is notorious for fake HMRC calls, threatening legal action over unpaid taxes to scare victims into paying immediately.
How to Block and Report These Numbers
If you’ve been targeted by any of these numbers, take immediate action:
- Block the Number: Use your phone’s built-in blocking features or apps like TrueCaller.
- Report to Ofcom and ICO: Ensure you report the number to regulatory bodies to help protect others.
- Stay Vigilant: Keep an eye out for new numbers and stay informed.
Final Thoughts
Scammers are becoming increasingly sophisticated, but by staying informed and taking proactive steps, you can significantly reduce your risk of falling victim to their tactics. Always verify unknown numbers and never share personal details unless you’re 100% sure of the caller’s identity.
Stay safe and stay alert. Protect yourself and others by sharing this information and blocking these numbers today.
