Telemarketing calls and scam phone numbers are a growing concern for mobile users across the UK. With a rise in fraudulent activities and unsolicited calls, it’s essential to stay vigilant and informed about the most commonly reported spam phone numbers. In 2025, several phone numbers have stood out for being associated with scams, marketing calls, and other unwanted contacts. This article will explore some of the most frequently reported spam numbers in the UK, providing insights into their potential origin, type of scam, and what you can do to protect yourself.
Quick Overview of Spam Numbers in the UK
Spam phone numbers in the UK often come in the form of cold calls, automated voice messages, or texts. These calls are typically made with the intention to scam or deceive recipients into sharing personal information, money, or agreeing to unwanted services. Over time, mobile phone users have reported various phone numbers that regularly show up on their caller IDs, often leaving them uncertain whether to answer or not.
These spam callers could be promoting dubious services, attempting phishing scams, or using aggressive marketing tactics. While the UK government and telecom companies have made efforts to combat these nuisance calls, scammers continue to evolve their tactics. Fortunately, thanks to the efforts of anti-scam tools like TrueCaller, Ofcom, and others, users are becoming more empowered to identify and avoid these malicious calls.
Let’s dive into the specifics of some of the most reported spam phone numbers in the UK for 2025.
List of Top Reported Spam Phone Numbers in 2025
1. 1887224460
This number has been flagged by several users for persistent marketing calls. While it often pretends to be associated with a well-known financial institution, it is likely a scam that attempts to steal personal information under the guise of a survey or loan offer.
Possible Scam Type:
- Fake loan offers
- Phishing for personal details
2. 2843729360
This international number has been repeatedly reported for cold calling UK residents. The callers often claim to be conducting a survey, but the ultimate goal is to acquire sensitive financial information.
Possible Scam Type:
- Financial scams
- Fake surveys and phishing attempts
3. 7520619034
Users have reported this number as one associated with unsolicited marketing, often related to personal loan offers. Calls typically come in the early morning or late evening hours, making it particularly disruptive.
Possible Scam Type:
- Personal loan scams
- Unsolicited marketing
4. 1615241776
This UK-based number is primarily associated with fake energy saving schemes. Callers often claim that the recipient is eligible for discounted energy services and demand immediate action to avoid losing the opportunity.
Possible Scam Type:
- Energy saving scams
- Aggressive marketing
5. 1743817282
This number has been reported numerous times for harassing calls, often with a recorded message claiming the recipient owes money for a service they never signed up for. The call ends with instructions on how to “pay” over the phone.
Possible Scam Type:
- Debt collection fraud
- Phishing for financial details
6. 1942901396
Many UK users have flagged this number as one used by fake lottery scammers. The callers claim that the recipient has won a large sum of money but requires a fee to claim the prize, leading many to unknowingly hand over their bank account details.
Possible Scam Type:
- Lottery scam
- Phishing attempts for bank details
7. 3301240404
This number has been reported for its frequent unsolicited calls, often about fake product warranties. Callers ask for immediate action and threaten the recipient with the expiration of a warranty, trying to coerce them into making a purchase.
Possible Scam Type:
- Fake warranty offers
- Unsolicited product sales
8. 3316303321
This number has been associated with fraudulent tech support services. The callers claim that the recipient’s computer is infected with malware, offering immediate services for a fee to remove the supposed virus.
Possible Scam Type:
- Tech support scams
- Malware removal fraud
9. 3333035419
A rising number of complaints have been made regarding this number, particularly from those who report receiving a series of harassing calls. The callers usually claim to be from a government agency or an insurance company, offering fake compensation for an accident the recipient supposedly had.
Possible Scam Type:
- Accident compensation fraud
- Fake insurance offers
10. 1615317256
This number has been flagged by multiple users who reported aggressive debt collection tactics. Callers often threaten legal action or imprisonment if payment is not made immediately, without any legal grounds to back up their claims.
Possible Scam Type:
- Fake debt collection fraud
- Harassing phone calls
Table of Reported Spam Numbers and Scam Types
| Phone Number | Reported Scam Type | Common Tactics |
| 1887224460 | Loan offers, phishing | Fake surveys, attempting to steal personal info |
| 2843729360 | Financial scams, phishing | Fake surveys, asking for financial details |
| 7520619034 | Loan offers, unsolicited calls | Cold calling about personal loans |
| 1615241776 | Energy saving scams, marketing | Fake energy services, time-sensitive threats |
| 1743817282 | Debt collection fraud | Fake debt claims, pressuring to pay immediately |
| 1942901396 | Lottery scam, phishing | Claiming prize money, requesting fees |
| 3301240404 | Warranty scams, unsolicited calls | Fake warranty offers, trying to sell services |
| 3316303321 | Tech support scams | Fake malware alerts, offering paid services |
| 3333035419 | Accident compensation fraud | Fake insurance claims, compensation offers |
| 1615317256 | Debt collection fraud | Harassing calls threatening legal actions |
How to Recognize and Deal with Spam Numbers
Identifying spam or scam numbers can be challenging, especially when the caller tries to appear legitimate. Here are some tips to recognize and deal with these unwanted calls:
1. Be Skeptical of Unsolicited Calls
If you receive a call from a number that you don’t recognize, be cautious. Legitimate companies will not ask for personal information over the phone.
2. Don’t Share Personal Information
Avoid providing personal or financial details over the phone, especially if the caller is pressuring you for immediate action.
3. Use Phone Number Lookup Tools
Use tools like TrueCaller, WhoCalledMe, and Ofcom to identify and report suspicious numbers. These services can help you avoid answering calls from known spam numbers.
4. Block Unwanted Numbers
If you continue to receive calls from a suspicious number, block it on your device. Most smartphones allow you to blacklist numbers easily.
5. Report the Number
If you encounter a spam or scam number, report it to Ofcom, TrueCaller, or the ICO (Information Commissioner’s Office). This helps authorities track and combat these scams.
What to Do If You’ve Been Scammed
If you have already shared personal information or money with a scammer, take immediate action:
- Contact your bank or credit card company to report any fraudulent transactions.
- Notify the police if you believe you’ve been a victim of fraud.
- Report the scam to Action Fraud (UK’s national fraud and cybercrime reporting center).
How to Prevent Spam Calls
Preventing spam calls can be difficult, but there are several steps you can take to minimize your risk:
1. Register with the Telephone Preference Service (TPS)
This free service allows you to opt-out of unsolicited marketing calls. While it won’t stop all spam calls, it can help reduce the volume.
2. Use Call Blocking Apps
Many call-blocking apps are available for both Android and iOS. These apps can automatically filter out spam calls, giving you peace of mind.
3. Limit Sharing Your Number
Be mindful of where you share your phone number. Avoid listing it publicly online or sharing it with companies unless absolutely necessary.
Conclusion
Spam phone numbers continue to plague mobile phone users across the UK, causing frustration and potential harm. By staying informed about the most commonly reported spam numbers, using call-blocking tools, and reporting suspicious calls, you can reduce your exposure to these scams. Stay cautious, protect your information, and remember that no legitimate company will ask you to make immediate financial decisions over the phone.
FAQs
Q1: What should I do if I receive a call from one of these numbers?
A1: If you receive a call from a reported spam number, do not engage with the caller. Instead, hang up, block the number, and report it to authorities such as Ofcom or Action Fraud.
Q2: How can I check if a number is spam or legitimate?
A2: Use apps like TrueCaller, WhoCalledMe, or search for the number online. These tools help identify if a number has been flagged as spam or a scam.
Q3: Are there any services to stop spam calls permanently?
A3: While no service can eliminate spam calls entirely, registering with TPS and using call-blocking apps can significantly reduce unwanted calls.
Q4: Can scammers access my information if I simply answer the call?
A4: Generally, answering a call doesn’t give scammers direct access to your information. However, they may attempt to trick you into providing personal details during the conversation. Always remain cautious.
Q5: Is it safe to call back an unknown number?
A5: It’s not safe to call back numbers you don’t recognize, especially if you missed a call from them. Scammers may use return calls as a way to charge high fees or gather information.
Meta Description:
Explore the top reported spam phone numbers in the UK for 2025, including 1887224460, 2843729360, 7520619034, 1615241776, 1743817282, 1942901396, 3301240404, 3316303321, 3333035419, and 1615317256. Learn how to identify, block, and report these scam numbers using tools like TrueCaller, WhoCalledMe, Ofcom, and TPS. Stay safe from phishing, scams, and unsolicited calls.
