In recent years, the rise of spam calls has become a major concern for mobile phone users, particularly in the UK. Unwanted calls often come from unknown numbers, and they can range from robocalls to fraudulent scams and marketing solicitations. Understanding which numbers are most frequently reported as spam can help individuals protect themselves and avoid falling victim to these scams. In this article, we’ll take a closer look at some of the most reported spam phone numbers in the UK in 2025, including their characteristics and how you can protect yourself.
Quick Overview: What Are Spam Phone Numbers?
Spam phone numbers refer to those from which unsolicited calls are made to individuals, often with the intent to sell products, offer fraudulent services, or scam the recipient out of money. These calls may come from legitimate-sounding organizations or entirely fabricated companies. Typically, these numbers are used for:
- Telemarketing: Companies that relentlessly call to sell products or services.
- Scam Calls: Fraudulent calls trying to trick recipients into sharing personal information or money.
- Robocalls: Automated calls that may deliver recorded messages with misleading information or warnings.
By tracking and identifying the most reported spam numbers, consumers can gain better insights into which calls to be cautious of. Now, let’s dive into the top spam numbers reported in the UK in 2025.
List of Most Reported Spam Numbers in 2025
1. 01743 839873
This number is consistently reported as a spam number due to its association with persistent cold calls. The majority of reports indicate that it is used by telemarketers attempting to sell financial products or services. Many users have reported feeling harassed by repeated calls from this number, often without an option to opt-out.
Key Issues:
- Telemarketing calls
- Lack of opt-out or Do Not Call option
- Financial product offers
2. 01616 601030
Another frequently flagged spam number is 01616 601030. This number has been reported as a common source of unsolicited calls regarding personal loans and payday loan schemes. These calls are often automated and may be trying to exploit individuals in urgent need of quick financial help.
Key Issues:
- Loan and payday loan scam
- Automated robocalls
- Potential data theft risk
3. 01289 222041
The 01289 222041 number has raised concerns for being linked to fraudulent companies posing as official bodies, such as HMRC or utility companies. Recipients of calls from this number often report aggressive tactics attempting to coerce them into paying debts or providing sensitive information.
Key Issues:
- Pretending to be an official institution (e.g., HMRC)
- Debt-related fraud
- Aggressive tactics
4. 01952 446550
Often reported as a number associated with persistent cold calls, 01952 446550 is frequently used for various scams, including holiday package offers and fake charity donations. Individuals receiving calls from this number often report that the caller is extremely persistent, sometimes calling multiple times a day.
Key Issues:
- Fake charity scams
- Holiday package offers
- Persistent calling
5. 01205 386545
The number 01205 386545 has been flagged as a potential fraudster trying to trick people into making financial decisions under false pretenses. Some users have reported receiving calls claiming that they have won prizes or been selected for exclusive offers, leading them to provide sensitive information or make upfront payments.
Key Issues:
- Prize scams
- Fraudulent prize claims
- Attempts to steal personal information
6. 01389 493417
Calls from 01389 493417 are frequently reported as spam related to fraudulent health and insurance schemes. Some recipients report that these calls seem to come from companies offering health insurance or other financial services, but they may be part of a broader scam network.
Key Issues:
- Fraudulent health and insurance services
- Misleading offers
- Likely part of a scam network
7. 07418 374545
The number 07418 374545 is another commonly reported spam number. Many users report receiving unsolicited calls from this number regarding debt collection or supposed overdue payments. The calls are often threatening and seem designed to frighten individuals into making payments they may not owe.
Key Issues:
- Fake debt collection calls
- Aggressive or threatening nature
- Likely a scam
8. 01700 663675
A frequently flagged number for spam is 01700 663675. It is often associated with robocalls offering fraudulent or fake services, such as debt management or loan consolidation. These calls typically use automated systems to dial large numbers of people in a short period.
Key Issues:
- Robocalls
- Fraudulent debt management offers
- Potential for data theft
9. 01782 580403
The number 01782 580403 has been linked to numerous complaints, primarily related to unsolicited calls about payday loans or financial services. Many recipients report that these calls are persistent and frequently include false claims of needing to act immediately to avoid penalties or loss of benefits.
Key Issues:
- Payday loan offers
- Urgency-based tactics
- Persistent calling
10. 01618 504320
Lastly, 01618 504320 is another number that has been reported as spam, mainly associated with robocalls offering fake products or services, including health plans and insurance. The calls are often aggressive and mislead individuals into thinking they are receiving a legitimate offer.
Key Issues:
- Robocalls
- Misleading health insurance offers
- Aggressive tactics
Table: Summary of Reported Spam Numbers
| Phone Number | Common Issue | Frequency of Reports | Caller Type |
| 01743 839873 | Financial products & telemarketing | High | Telemarketing |
| 01616 601030 | Loan and payday loan scam | High | Robocall |
| 01289 222041 | HMRC or utility fraud | Medium | Scam/fraud |
| 01952 446550 | Fake charity scams & holiday packages | High | Scam/Telemarketing |
| 01205 386545 | Prize scams and fraudulent offers | Medium | Scam |
| 01389 493417 | Health & insurance fraud | Medium | Scam |
| 07418 374545 | Fake debt collection | High | Fraud |
| 01700 663675 | Robocalls for debt management scams | Medium | Robocall |
| 01782 580403 | Payday loan scams | Medium | Fraud/Robocall |
| 01618 504320 | Fake health insurance & product scams | Medium | Robocall |
How to Protect Yourself from Spam Calls
Spam calls are more than just an inconvenience—they can lead to identity theft, financial losses, or unwanted solicitation. Here are some ways to protect yourself:
1. Use Call Blockers
Most smartphones have built-in call-blocking features, and there are also apps like TrueCaller, WhoCalledMe, and Hiya that help identify and block spam calls. These apps provide real-time identification of known spam numbers.
2. Register for the Telephone Preference Service (TPS)
By registering your phone number with the Telephone Preference Service (TPS), you can reduce the likelihood of receiving unsolicited sales and marketing calls. While this won’t stop all spam calls, it can help reduce the volume.
3. Do Not Share Personal Information
Never share personal details such as your bank account number, National Insurance number, or password over the phone unless you are absolutely certain of the caller’s identity. If in doubt, hang up and call the organization directly using a verified contact number.
4. Report Spam Calls
If you receive a spam call, you should report it. Organizations like Ofcom, ICO (Information Commissioner’s Office), and TrueCaller allow users to report spam numbers. This helps build databases that others can use to avoid scams.
5. Use Call Screening
Some mobile networks offer call screening services, which allow you to screen incoming calls from unknown numbers. This can help avoid unwanted interruptions from suspicious calls.
Conclusion
Spam calls are a persistent nuisance, and knowing which numbers to avoid is an essential part of staying safe. The numbers mentioned in this article represent a small fraction of the many spam calls plaguing UK residents. By using call-blocking apps, registering with TPS, and reporting suspicious numbers, you can protect yourself from falling victim to these scams. Always be cautious when receiving unsolicited calls, especially those that pressure you into making immediate decisions.
If you receive any calls from the numbers listed above, consider blocking them and reporting them to relevant authorities. Stay informed, stay protected, and help keep the phone lines clear of scammers!
FAQ: Spam Phone Numbers
Q1: How do I block spam calls on my phone?
You can block calls by using the built-in features on your smartphone or by downloading third-party apps like TrueCaller or WhoCalledMe.
Q2: What is TPS and how can I register?
The Telephone Preference Service (TPS) is a free service that allows you to opt-out of unsolicited marketing calls. You can register online at the official TPS website.
Q3: Are all calls from unknown numbers spam?
No, not all calls from unknown numbers are spam. However, it is advisable to be cautious and avoid sharing personal information with unfamiliar callers.
Q4: What should I do if I’ve given personal information to a spam caller?
If you believe you’ve given personal information to a scammer, contact your bank, change your passwords, and report the incident to the ICO or Action Fraud.
Q5: How can I report a spam number?
You can report a spam number to organizations like Ofcom, ICO, or use apps like TrueCaller to help others identify and block these numbers.
Meta
“Explore the top reported spam phone numbers in the UK (2025) such as 01743839873, 01616601030, 01289222041, 01952446550, 01205386545, 01389493417, 07418374545, 01700663675, 01782580403, and 01618504320. Learn how to block scam calls, protect your privacy, and use tools like TrueCaller, WhoCalledMe, TPS, and ICO to report suspicious numbers.”
