Spam phone calls are an increasing nuisance for residents across the UK. In 2025, the number of complaints about unwanted calls—especially from suspicious or unidentified numbers—has skyrocketed. These spam calls are not only irritating but often linked to scams, phishing attempts, and fraudulent activity. In this comprehensive guide, we’ll highlight the top reported spam phone numbers in the UK for 2025, giving you the information needed to stay alert and avoid potential fraud.
Understanding Spam Phone Numbers in the UK
Spam phone numbers are often used by scammers, telemarketers, and fraudsters to trick people into providing sensitive information or making payments. These calls can mimic legitimate numbers (known as spoofing) and may even appear local to the recipient to increase the likelihood of a response.
In 2025, many users reported receiving calls that:
- Asked for personal information like National Insurance numbers
- Pretended to be from HMRC, energy suppliers, or internet providers
- Offered fake investment schemes or compensation claims
To help UK residents stay vigilant, we’ve compiled a list of the most reported spam numbers this year, along with user experiences and warning signs.
Top 10 Reported Spam Phone Numbers in UK (2025)
| Phone Number | Type of Spam | Common Complaint | Risk Level |
| 0161 531 6131 | Investment Scam | Fake investment opportunities | High |
| 0121 424 3333 | NHS Number Spoof | Misleading medical appointment scams | High |
| 01743 839 873 | Tax Scam (HMRC) | Threats about unpaid taxes | Very High |
| 0161 660 1030 | Broadband Scam | Fake BT/Openreach technician calls | High |
| 01289 222 041 | Compensation Claim Scam | Fake road accident compensation offers | Medium |
| 01952 446 550 | Insurance Cold Call | Unsolicited motor insurance offers | Medium |
| 01205 386 545 | Energy Provider Scam | False offers for energy tariff changes | Medium |
| 01389 493 417 | Fake Bank Call | Impersonating UK banks to steal data | Very High |
| 07418 374 545 | Mobile Scam Number | Fake competition or prize-winning calls | High |
| 01700 663 675 | Voicemail Scam | Messages asking to call back premium numbers | High |
0161 531 6131 – Fake Investment Opportunity
This Manchester-based number has been widely reported in 2025 for attempting to lure people into fraudulent investment schemes. Victims often say they were contacted by someone claiming to be a financial adviser or crypto expert promising unusually high returns.
“The caller knew my name and claimed I had filled out a finance form online. They pressured me to invest in a new cryptocurrency project.”
🔴 Warning Signs:
- Promises of high returns with low risk
- Pushy sales tactics
- No clear company information
0121 424 3333 – Spoofed NHS Number
This Birmingham number actually belongs to a real NHS department, but scammers have been spoofing it to impersonate the health service. People reported receiving calls asking for medical history or payment for fictitious procedures.
“They asked for my NHS number and said I had an unpaid hospital bill, which made no sense.”
🔴 Warning Signs:
- Asking for personal medical information
- Requesting payments or credit card details
- Poor grammar or rushed speech
01743 839 873 – Fake HMRC Threats
This Shrewsbury number has been linked to aggressive tax scam calls. Callers claim to be from HMRC and tell the victim they owe unpaid taxes and face legal action.
“I was told I’d be arrested unless I paid £980 immediately through bank transfer.”
🔴 Warning Signs:
- Threats of legal action or arrest
- Demands for immediate payment
- Robotic voice messages
0161 660 1030 – Fake BT or Openreach Technician
Many users across the UK received calls from this number claiming to be from BT or Openreach, saying there’s a virus on their router or suspicious activity on their internet connection.
“They wanted remote access to my computer, saying they needed to fix my Wi-Fi.”
🔴 Warning Signs:
- Offers to fix your internet remotely
- Requesting you to install apps like AnyDesk or TeamViewer
- Heavy tech jargon to confuse the user
01289 222 041 – Fake Compensation Calls
This number, associated with Berwick-upon-Tweed, has been flagged for accident compensation scams. Callers typically state that the recipient was recently in a road accident and is owed compensation.
“I never had an accident, yet they insisted they had my file and wanted details.”
🔴 Warning Signs:
- Vague information about your accident
- Pressuring you to share insurance or medical data
- No company verification
01952 446 550 – Motor Insurance Scam
Originating from Telford, this number is known for offering cheap car insurance—usually asking for bank details to “secure a deal.” Many complain they never signed up for such calls.
“They said they could cut my insurance in half but needed my sort code.”
🔴 Warning Signs:
- Offers that sound too good to be true
- Pressure to make immediate payment
- Request for direct debit information
01205 386 545 – Fake Energy Deals
Reported across the Midlands, this number often pretends to represent energy companies, offering fake discounts on tariffs or switching offers. Some even falsely claim to work with Ofgem.
“They said I could save £300 a year but wouldn’t confirm the supplier name.”
🔴 Warning Signs:
- No proof of affiliation with a known energy company
- Dodging basic verification questions
- Urging quick action or you’ll “miss the deal”
Check Recent Spamming Numbers:
01634535585 : : 040855989821 : : 01618200299 : : 07441902976 : : 01162018000
01389 493 417 – Bank Impersonation Scam
One of the most dangerous numbers, this Dumbarton-based caller pretends to be from your bank, warning of “suspicious transactions” on your account. Victims have lost thousands.
“They knew my bank name and account digits. I later realized it was a con.”
🔴 Warning Signs:
- Asking you to transfer money to a “safe account”
- Using fear to create urgency
- Knowing partial bank info to sound credible
07418 374 545 – Mobile-Based Prize Scam
This mobile number was frequently reported in early 2025 for telling people they’ve won a prize or entered a competition, then requesting payment or personal info to “claim” it.
“They said I won an iPhone and just needed to pay delivery. It was fake.”
🔴 Warning Signs:
- You never entered any competition
- Payment required for a ‘free prize’
- Poor audio quality or pre-recorded message
01700 663 675 – Voicemail Scam Number
This number from Rothesay sends fake voicemail alerts, often instructing people to call back a premium rate number. Once connected, the charges rack up.
“It played a strange message and asked me to call back urgently.”
🔴 Warning Signs:
- You never received the original voicemail
- Requests to call back an unknown number
- No clear identification of the company
How To Protect Yourself from Spam Calls
Dealing with spam calls can be frustrating, but staying informed is the best defense. Here are some essential tips:
5 Tips to Avoid Phone Scams
- Never share personal information with unknown callers.
- Hang up immediately if the call sounds suspicious.
- Use call-blocking apps like Truecaller or Hiya.
- Report the number to OFCOM or Action Fraud.
- Check online for reports of similar calls before acting.
Reporting Spam Numbers in the UK
If you receive a spam call, don’t just ignore it—report it. You can help protect others and assist authorities in shutting down scam operations.
📤 Where to Report:
- Action Fraud: actionfraud.police.uk
- OFCOM: ofcom.org.uk
- ICO (Information Commissioner’s Office): ico.org.uk
Conclusion
As spam calls continue to rise in 2025, being proactive and informed is crucial. The numbers listed in this article are just a sample of the thousands of spam and scam calls reported daily across the UK. Whether it’s a fake bank call or a bogus prize notification, the key is to never act out of fear or urgency. Stay calm, verify, and when in doubt—don’t answer or engage.
By understanding the warning signs and reporting suspicious activity, you contribute to a safer digital environment for everyone.
Frequently Asked Questions (FAQs)
What should I do if I answered a spam call?
If you answered a spam call, hang up immediately. Do not provide any personal information. If you did, contact your bank or relevant services right away.
Can spam calls steal money from me?
Yes, phone scams can lead to financial loss if you share sensitive information, make payments, or allow remote access to your devices.
How can I stop getting spam calls?
You can register with the Telephone Preference Service (TPS) and use call-blocking apps. Additionally, report and block suspicious numbers to minimize future contact.
