The world of phone calls can be both convenient and disruptive. While many calls are from people we know or important services, a growing number of unwanted calls are increasingly disturbing. Spam calls, often from telemarketers, scammers, and fraudsters, are a persistent problem for people in the UK 3301240410 . These calls can come from a wide range of numbers, some of which are particularly troublesome.
In 2025, a few numbers have been flagged as particularly problematic, showing up time and again in spam reports. Below, we will explore these numbers, including details on the types of calls people are receiving and ways to block or report them.
Quick Overview of Reported Spam Numbers in the UK
Spam calls, including fraudulent schemes, robocalls, and aggressive telemarketing, have been a growing issue in the UK. Here are some of the most reported spam numbers that have caused concern for people:
- 1234247239
- 1388436857
- 3316309077
- 3301240410
- 1708956207
- 1204565865
- 2080444031
- 1656337649
- 1218241090
- 3316307811
These numbers have been flagged by various call-blocking apps and consumer protection agencies, leading to increased awareness about the need to block and report these numbers. Let’s dive into each of these numbers in more detail.
Number Breakdown and What People Are Saying
Here’s a closer look at these problematic phone numbers and the details behind the calls they are making.
1. 1234247239
This phone number is notorious for scam calls in the UK, primarily targeting people with automated voice messages that claim to be from HMRC or other government bodies. They often threaten legal action, such as arrest warrants, if the recipient does not provide sensitive information or make immediate payments.
- Type of Call: Scam/Fraud
- Common Reported Activity: HMRC-related threats, requests for personal information.
- What To Do: Do not engage with the caller. Report to Action Fraud UK.
2. 1388436857
This number is commonly associated with telemarketing calls, particularly from companies selling insurance products, loans, or other financial services. Many people have reported receiving multiple calls from this number, often at inconvenient hours.
- Type of Call: Telemarketing
- Common Reported Activity: Selling insurance and loans.
- What To Do: Block the number, or opt out using the company’s unsubscribe service if available.
3. 3316309077
Calls from this number typically appear to be from overseas but have been identified as part of a larger scam operation. The call usually claims that you have won a prize or lottery, and in order to claim it, you must provide bank details or pay a fee.
- Type of Call: Prize Scam
- Common Reported Activity: Claims of winning a prize, requiring personal or financial details.
- What To Do: Ignore the call and report it to the ICO (Information Commissioner’s Office).
4. 3301240410
This number has been flagged for making robocalls to UK residents, offering fake products and services. The recorded messages often promote “free” services but eventually ask for a credit card number or personal data.
- Type of Call: Robocall/Telemarketing Scam
- Common Reported Activity: Fake services and offers.
- What To Do: Report the number to the ICO and block it through your phone.
5. 1708956207
Many users have reported this number for persistent calls offering payday loans and other financial services. The offers often sound too good to be true and come with high interest rates.
- Type of Call: Loan Scam/Telemarketing
- Common Reported Activity: Unsolicited loan offers with high interest rates.
- What To Do: Block the number and report the call to Ofcom.
6. 1204565865
This number has been tied to scam calls pretending to be from utility companies. Callers often claim that you owe money and threaten to cut off your utilities if immediate payment isn’t made.
- Type of Call: Utility Scam
- Common Reported Activity: Claims of unpaid bills, threats of disconnection.
- What To Do: Hang up and report the number to the relevant utility company.
7. 2080444031
This number is another persistent telemarketing line offering loan consolidation and debt relief services. People report that the calls can be aggressive, with persistent follow-up calls even after requesting to be removed from the calling list.
- Type of Call: Debt Relief Telemarketing
- Common Reported Activity: Debt consolidation services, often with hidden fees.
- What To Do: Register your number with the Telephone Preference Service (TPS) and block the number.
8. 1656337649
Calls from this number often mimic official institutions, including banks or government agencies. The scam usually involves asking for sensitive information or urging individuals to download malicious apps for supposed security checks.
- Type of Call: Phishing Scam
- Common Reported Activity: Pretending to be from banks or government agencies to steal information.
- What To Do: Do not provide any personal information and report it to Action Fraud UK.
9. 1218241090
This number has been linked to fake customer support calls. Users report receiving messages stating that their computer or account has been compromised, urging them to call back and provide payment to resolve the issue.
- Type of Call: Tech Support Scam
- Common Reported Activity: Claims of a compromised account or computer, asking for payment.
- What To Do: Hang up immediately and report it to Action Fraud UK.
10. 3316307811
Calls from this number often claim to be from a prize giveaway or lottery win, but in reality, they are simply phishing attempts trying to gather personal or financial information under the guise of a “gift.”
- Type of Call: Prize Scam
- Common Reported Activity: False prize or lottery winnings requiring payment.
- What To Do: Ignore the call and report it to the ICO.
Detailed Table of Spam Numbers in the UK (2025)
Here’s a summarized table of the top 10 reported spam numbers in the UK, along with their types and reported activities:
| Phone Number | Type of Call | Common Reported Activity | Recommended Action |
| 1234247239 | Scam/Fraud | HMRC-related threats, requests for personal info | Do not engage, report to Action Fraud |
| 1388436857 | Telemarketing | Selling insurance, loans, financial services | Block the number, unsubscribe if possible |
| 3316309077 | Prize Scam | Claims of winning a prize, requires bank details | Ignore and report to ICO |
| 3301240410 | Robocall/Telemarketing Scam | Fake services, requiring credit card info | Report to ICO, block the number |
| 1708956207 | Loan Scam/Telemarketing | Unsolicited payday loan offers, high interest rates | Block and report to Ofcom |
| 1204565865 | Utility Scam | Claims of unpaid bills, threats of utility disconnection | Hang up, report to the utility company |
| 2080444031 | Debt Relief Telemarketing | Debt consolidation offers with hidden fees | Register with TPS, block the number |
| 1656337649 | Phishing Scam | Mimicking banks/government, asking for sensitive info | Do not engage, report to Action Fraud |
| 1218241090 | Tech Support Scam | Claims of compromised account, asking for payment | Hang up, report to Action Fraud |
| 3316307811 | Prize Scam | False prize or lottery wins, asking for payment | Ignore and report to ICO |
How to Protect Yourself from Spam Calls
The best defense against spam calls is prevention. Here are some steps you can take to reduce the number of unwanted calls:
1. Register with the Telephone Preference Service (TPS)
The TPS allows you to opt out of unsolicited marketing calls. It’s a free service, and once you’re registered, companies must stop calling your number.
2. Use Call-Blocking Apps
There are numerous apps available, like TrueCaller, WhoCalledMe, and Hiya, which identify and block spam and robocalls. These apps can help automatically block known spam numbers and flag suspicious calls.
3. Do Not Engage
If you do pick up a spam call, do not provide any personal or financial information. Hang up immediately. Engaging with the caller can often lead to more calls.
4. Report Spam Calls
You can report spam numbers to Action Fraud or the Information Commissioner’s Office (ICO). These organizations track and investigate fraudulent activity and scams.
5. Use Your Phone’s Built-in Features
Most smartphones come with features to block unknown or suspected spam calls. You can enable these settings in your phone’s call settings menu.
Conclusion: Stay Safe from Spam Calls
In 2025, spam calls remain a significant issue in the UK, with numbers like 1234247239 and 3316309077 among the most reported. It’s essential to stay vigilant, avoid engaging with suspicious calls, and use available tools to block these numbers. By taking preventive measures, you can protect yourself from falling victim to scams, fraud, and unnecessary marketing.
Remember, if you ever feel unsure about a call, it’s better to hang up and report it to the appropriate authorities. Stay safe and block those unwanted calls!
Also Read This: 1618200299: Most Reported UK Scam Number
