Spam calls have become a widespread issue for many individuals in the UK. With the increase in robocalls, scam attempts, and telemarketing, it’s crucial for people to stay informed about the phone numbers associated with these nuisance calls. Whether you’re trying to protect your privacy or avoid falling victim to scams, knowing which phone numbers to watch out for can save you time and frustration. In this article, we’ll explore the top reported spam phone numbers in the UK for 2025. These numbers have been frequently reported by people across the country and are commonly associated with unwanted calls.
We’ll dive into each of these numbers, provide a brief overview of the complaints, and offer insights on how to block and report them. Additionally, we’ll include a table for quick reference, so you can easily identify the numbers causing the most hassle.
Why Are Spam Calls a Growing Problem?
Spam calls are increasingly being made by automated systems (robocalls), telemarketers, and scammers looking to target individuals for various malicious purposes. These calls might seem harmless at first but can lead to identity theft, financial loss, or simply unwanted distractions. In the UK, spam callers often use local phone numbers or international numbers that appear to be local to create a sense of legitimacy.
The good news is that tools like TrueCaller, WhoCalledMe, Ofcom, and others can help you identify and block these spam numbers. Nevertheless, it’s still vital to stay informed and report these numbers to the proper authorities.
Table of Top Reported Spam Phone Numbers
Here is a list of the most frequently reported spam phone numbers in the UK for 2025. These numbers have been flagged by many individuals and services as problematic and are often associated with scam calls or telemarketing.
| Phone Number | Reported Issue | Type of Spam Call | Actionable Steps |
| 01615274971 | Persistent calls, unsolicited offers | Robocalls, Scam | Block & report to ICO |
| 01702660930 | Fraudulent offers for loans | Scam call | Block & report to Ofcom |
| 03301248035 | Unwanted surveys, credit card offers | Telemarketing | Use Call Blocking App |
| 01423645008 | Debt collection scam | Scam | Report to TPS and ICO |
| 07441107428 | Insurance scam calls | Scam | Use TrueCaller and block |
| 01615316278 | PPI claims | Telemarketing | Block using phone settings |
| 01234237085 | Fake prize draws | Scam | Report to Ofcom |
| 03332421450 | Investment scam | Scam | Block and report to TPS |
| 01615316131 | Unsolicited marketing calls | Telemarketing | Use WhoCalledMe to identify |
| 01214243333 | Unwanted surveys | Telemarketing | Report via ICO |
Now let’s explore each of these numbers in more detail and uncover why they’ve been flagged as spam.
01615274971: Persistent Robocalls and Scams
Overview
The number 01615274971 has been widely reported as a source of persistent robocalls. These automated calls often include pre-recorded messages trying to sell products or services. Many victims have also reported receiving scam calls from this number, including offers that seem too good to be true.
Common Complaints
- Calls for fake debt relief services
- Unsolicited offers for loans or financial products
- Persistent follow-up calls despite being asked to stop
How to Handle This Number
If you receive calls from this number, it’s highly advisable to block it immediately. You can also report it to the Information Commissioner’s Office (ICO) for further action. Many users have successfully identified this number as spam using apps like TrueCaller and WhoCalledMe.
01702660930: Fraudulent Loan Offers
Overview
01702660930 is often flagged by users who report receiving fraudulent loan offers from this number. The callers promise large sums of money in exchange for an upfront fee, which is a classic scam tactic. The victim sends the money, but the loan is never issued.
Common Complaints
- Fake loan offers requiring upfront payments
- Aggressive calling tactics to pressure people into paying
- Offers that seem too good to be true
How to Handle This Number
If you receive a call from this number, never provide any personal information or money. Use Ofcom’s website to report the number, and block it on your phone to avoid future calls.
03301248035: Unwanted Surveys and Credit Card Offers
Overview
The number 03301248035 has been linked to unwanted surveys and unsolicited offers for credit cards. Many people have reported receiving calls that initially seem like surveys but quickly turn into aggressive marketing for financial products.
Common Complaints
- Unsolicited credit card offers
- Persistent marketing calls about loans or mortgages
- Unwanted surveys collecting personal data
How to Handle This Number
This number is a typical telemarketing caller. You can use a call-blocking app to avoid getting these types of calls. It’s also worth reporting the number to Ofcom to track potential misuse.
01423645008: Debt Collection Scams
Overview
01423645008 has been reported as a debt collection scam number. The callers pretend to represent a legitimate company, threatening legal action unless an immediate payment is made. These calls often involve intimidation tactics to extract money from victims.
Common Complaints
- Claims of outstanding debts
- Threats of legal action or court cases
- Demands for immediate payments
How to Handle This Number
Never make any payments or provide personal details if you receive a call from this number. Report it to the Telephone Preference Service (TPS) and ICO for further investigation. Blocking the number is also highly recommended.
07441107428: Insurance Scam Calls
Overview
Many UK residents have reported receiving insurance scam calls from 07441107428. These callers offer cheap or discounted insurance products that seem too good to be true. In some cases, they’ve been found to request personal information under the guise of offering quotes.
Common Complaints
- Fake insurance quotes
- Requests for personal information under false pretenses
- Unsolicited marketing calls
How to Handle This Number
To stop receiving these calls, it’s best to block the number. Additionally, services like TrueCaller can help you identify and block such numbers easily.
01615316278: PPI Claims
Overview
PPI (Payment Protection Insurance) claim companies are notorious for calling people who may have had a loan or mortgage in the past. 01615316278 is associated with these types of unsolicited calls, where the caller offers to help you reclaim money.
Common Complaints
- Unsolicited PPI claims
- Frequent calls despite being told to stop
- High-pressure sales tactics
How to Handle This Number
You can block this number and report it through the ICO. Additionally, some call-blocking apps can help identify and block these calls automatically.
01234237085: Fake Prize Draws
Overview
The number 01234237085 has been linked to fake prize draw scams. Victims report receiving calls informing them they’ve won a prize but must pay an upfront fee to claim it. Of course, no prize ever materializes.
Common Complaints
- Claims of winning a prize
- Requests for payment to claim winnings
- High-pressure tactics to encourage payment
How to Handle This Number
You can report this number to Ofcom and block it using your phone’s settings. It’s important never to pay money for so-called “prizes” that you’ve never entered for.
03332421450: Investment Scams
Overview
Investment scams are becoming more prevalent, with scammers trying to lure individuals into bogus investment opportunities. 03332421450 is frequently reported for this type of scam, promising high returns on investments in sectors like real estate or stocks.
Common Complaints
- Promises of high returns with little risk
- Aggressive tactics to secure investments
- Fake investment opportunities
How to Handle This Number
Report this number to the TPS, and block it immediately to avoid falling for these investment scams.
01615316131: Unsolicited Marketing Calls
Overview
The number 01615316131 is reported as a common source of unsolicited marketing calls. These calls offer products and services across a range of industries, from insurance to energy bills.
Common Complaints
- Unwanted marketing calls
- Harassing follow-up calls
- Lack of an opt-out option
How to Handle This Number
Block this number and report it to WhoCalledMe to ensure others can be informed. If you continue receiving calls, consider reporting the matter to Ofcom.
01214243333: Unwanted Surveys
Overview
Many UK residents have also flagged 01214243333 for being associated with unwanted surveys. These surveys often promise rewards but end up being a cover for marketing calls.
Common Complaints
- Surveys that turn into marketing pitches
- Collection of personal data
- Repeated follow-ups even after requesting removal
How to Handle This Number
You can block the number on your phone and report it to the ICO. If you don’t want to receive similar calls, it’s also a good idea to register your number with the Telephone Preference Service (TPS).
How to Block and Report Spam Numbers
There are several ways you can block and report spam numbers to protect yourself:
- Call Blocking Apps: Apps like TrueCaller and WhoCalledMe can help identify spam calls and block them automatically.
- Phone Settings: Most smartphones allow you to block numbers directly in the call settings.
- Report to Authorities: Report spam calls to Ofcom, ICO, and TPS to help authorities take action.
Conclusion
Spam calls are a nuisance, but being informed and proactive can protect you from falling victim to scams. If you encounter any of the numbers listed above or others that seem suspicious, take action immediately. By blocking these numbers and reporting them to the relevant authorities, you can help reduce the number of unwanted calls in the future.
Don’t let spam callers invade your privacy — take control today!
FAQs
1. What is the best app to block spam calls in the UK?
- Apps like TrueCaller and WhoCalledMe are excellent tools for blocking spam calls and identifying suspicious numbers.
2. How do I report spam calls in the UK?
- You can report spam calls to Ofcom, ICO, and TPS to help prevent future calls.
3. Are all calls from these numbers spam?
- While most calls from these numbers are reported as spam, always be cautious. If in doubt, avoid sharing personal details.
4. What happens if I accidentally answer a spam call?
- If you accidentally answer a spam call, avoid giving out any personal information. Simply hang up and block the number.
5. How can I prevent receiving spam calls?
- Register your number with TPS, use call-blocking apps, and report spam calls to the authorities to reduce the chances of receiving them.
Meta
“Explore the top reported spam phone numbers in the UK for 2025, including 01615274971, 01702660930, 03301248035, 01423645008, 07441107428, 01615316278, 01234237085, 03332421450, 01615316131, and 01214243333. Learn how to block and report these nuisance calls using TrueCaller, WhoCalledMe, Ofcom, ICO, and TPS. Stay protected from scams and unwanted telemarketing calls.”
