In the ever-evolving world of telecommunications, spam calls have become a significant concern for many UK residents. Whether it’s from automated robocalls, scam operations, or telemarketers, these calls often come from unfamiliar numbers and can be incredibly disruptive. With the rise in mobile and landline usage, spam calls continue to be an issue, causing frustration for individuals and businesses alike. In response, various platforms, consumer watchdogs, and the public have identified numerous numbers associated with such nuisance calls. In this article, we will highlight some of the top reported spam phone numbers in the UK as of 2025 and explore why these numbers are targeted by consumers and what actions can be taken to mitigate these calls.
Overview of Spam Calls in the UK
Before diving into specific numbers, it’s important to understand the nature of spam calls. Spam calls are unsolicited and often intrusive phone calls made by businesses or fraudsters. These calls are made for various reasons including, but not limited to:
- Scams: Fraudulent calls attempting to trick recipients into providing personal information, such as bank account numbers, passwords, or other sensitive data.
- Telemarketing: Legitimate businesses often use aggressive marketing strategies, calling potential customers multiple times.
- Robocalls: Automated voice calls that often try to sell services or collect information.
- Debt Collection: Calls made by agencies attempting to collect outstanding debts, sometimes using harassment tactics.
These calls can be annoying, disruptive, and in some cases, dangerous. Fortunately, the UK has systems in place to help consumers identify and block such calls.
Most Reported Spam Phone Numbers in the UK (2025)
Here’s a detailed list of the 10 most reported spam phone numbers in the UK for 2025. These numbers have been flagged by users for activities such as scam attempts, unsolicited sales calls, and other types of nuisance calls.
01480 710048
This number is reported as one of the most persistent spam callers in the UK. It is associated with unsolicited sales calls and has been used by various companies, particularly those dealing with PPI (Payment Protection Insurance) claims. Many consumers have reported receiving automated messages urging them to act quickly and claim compensation. The calls are often repeated, leading to frustration.
| Number | Type of Spam Call | Location | Frequency of Complaints |
| 01480 710048 | PPI Claims / Sales | Cambridgeshire | High |
Consumer Feedback:
- Many users report that the calls are repetitive and often come at inconvenient times.
- Some people claim that these calls use robocall technology, leaving voicemails with no option to opt-out easily.
03316301300
This number is flagged for being associated with scam operations attempting to gather sensitive personal information from unsuspecting individuals. It is often used by fraudsters claiming to be representatives from well-known financial institutions or government organizations. Some of the reported tactics involve telling recipients that their bank account has been compromised or that there is a fraudulent activity in their account, asking them to verify their details.
| Number | Type of Spam Call | Location | Frequency of Complaints |
| 03316301300 | Fraudulent Call / Scam | Nationwide | Very High |
Consumer Feedback:
- Several individuals have complained about threatening messages, pressuring them to take action quickly.
- Calls are typically untraceable, making it difficult to block or report.
03001312110
This phone number has been reported for its association with unsolicited government grants or loans. Callers claim to be from government-backed organizations and try to convince recipients to apply for loans or grants, often requiring a fee upfront for processing. The callers frequently ask for personal details to “secure” the loan or grant.
| Number | Type of Spam Call | Location | Frequency of Complaints |
| 03001312110 | Government Grant Scam | Nationwide | High |
Consumer Feedback:
- Victims of the scam often mention that the callers are very convincing, using official jargon.
- People report that they lose money in the process after providing their banking details.
03316303320
Known for persistent cold calls, this number has gained notoriety for its involvement in survey-based marketing scams. The callers usually claim to be conducting surveys for companies, but instead of legitimate surveys, they pressure recipients into providing sensitive information, or they bombard them with further sales calls for related products.
| Number | Type of Spam Call | Location | Frequency of Complaints |
| 03316303320 | Survey Scam / Telemarketing | Nationwide | Medium |
Consumer Feedback:
- Callers often hang up if the recipient expresses disinterest.
- Multiple reports indicate that these calls are difficult to stop once they’ve begun.
0345 300 4454
Check Recent Spamming Numbers:
01204565837: : 01482680397: : 01273036580: : 02882480140: : 01700663675
This number is reported as a banking-related scam targeting victims through fraudulent alerts about bank accounts being compromised. The scam works by posing as official banking notifications, attempting to trick individuals into providing login details or credit card information.
| Number | Type of Spam Call | Location | Frequency of Complaints |
| 0345 300 4454 | Banking Fraud / Scam | Nationwide | High |
Consumer Feedback:
- Many individuals report feeling panicked due to the urgent tone used in the calls.
- A number of reports highlight that the callers claim to be from reputable banks, making it harder for people to identify the scam immediately.
01615202018
This number is regularly associated with telemarketing calls. It is used by various marketing firms to sell a variety of products, from insurance plans to lifestyle services. Many consumers find these calls intrusive, especially when they are contacted multiple times within a short period.
| Number | Type of Spam Call | Location | Frequency of Complaints |
| 01615202018 | Telemarketing | Manchester | Medium |
Consumer Feedback:
- The main complaint is the frequency of the calls, often resulting in multiple calls a day.
- Callers are sometimes aggressive, making it difficult to opt-out.
02036080245
This number has been flagged as one that is frequently used for automated marketing calls. It’s associated with calls that attempt to sell various services, including home improvement offers, energy-saving products, and more. The robocalls often start with a generic introduction and then attempt to collect personal details for further marketing purposes.
| Number | Type of Spam Call | Location | Frequency of Complaints |
| 02036080245 | Robocalls / Marketing | London | High |
Consumer Feedback:
- Recipients have complained about the lack of an option to speak to a representative or remove themselves from the calling list.
- Calls are often labeled as unwanted marketing, which increases frustration.
03301591234
This number is commonly associated with debt collection calls. While some calls may be legitimate, many have been flagged by consumers for using harassment tactics, including threats of legal action, high-pressure sales, and manipulation. The number is used by companies attempting to recover overdue debt in an aggressive manner.
| Number | Type of Spam Call | Location | Frequency of Complaints |
| 03301591234 | Debt Collection Scam | Nationwide | High |
Consumer Feedback:
- Aggressive tactics are often used, leading to feelings of harassment and anxiety.
- Some complain about persistent calls even after the debt is settled.
02038960349
Similar to other numbers listed here, this one is tied to robocall marketing. It’s used to push a variety of products and services, from insurance to home improvement solutions. These calls are often intrusive, with little regard for time of day, and they tend to happen regularly.
| Number | Type of Spam Call | Location | Frequency of Complaints |
| 02038960349 | Robocalls / Marketing | London | Medium |
Consumer Feedback:
- Many report that they are unable to get through to a live person to request removal from the call list.
- Complaints indicate that these calls are often received at inconvenient times.
0121 652 0182
This number is most often associated with personal injury claims. The callers claim to be reaching out to those who have recently been involved in an accident, offering them legal representation or settlement assistance. Many individuals report that these calls are aggressive and frequently come at odd hours.
| Number | Type of Spam Call | Location | Frequency of Complaints |
| 0121 652 0182 | Personal Injury Claims | Birmingham | Medium |
Consumer Feedback:
- Persistent calls are reported, with no way to easily unsubscribe.
- Individuals claim that these calls make them feel uncomfortable or harassed.
How to Avoid and Block These Numbers
While spam calls are an ongoing issue, there are steps you can take to avoid and block these numbers:
1. Register with the Telephone Preference Service (TPS)
- TPS is a free service that allows you to opt out of unsolicited marketing calls.
2. Use Call Blocking Apps
- There are numerous apps available that can help you block unwanted calls. Many of these apps automatically identify and block known spam numbers.
3. Block Numbers Manually
- On most mobile devices, you can manually block specific phone numbers, preventing them from calling you again.
4. Report Spam Calls
- You can report spam calls to organizations like the Information Commissioner’s Office (ICO) to help reduce the prevalence of these calls.
Conclusion
Spam phone calls in the UK remain a major issue, with numerous individuals reporting frustration over persistent and intrusive calls. As scam tactics become more sophisticated, it’s essential for consumers to stay vigilant and utilize available tools to block unwanted calls. While the list above highlights some of the most commonly reported spam numbers, it’s important to remember that scammers are constantly changing their tactics and numbers. Stay informed, report spam, and take action to protect yourself from potential fraud.
