In 2025, spam calls continue to be a widespread nuisance across the United Kingdom. Despite increasing efforts from telecom regulators, scammers and spammers constantly find new ways to exploit unsuspecting victims. The growing sophistication of these schemes, combined with widespread mobile phone usage, has made it more crucial than ever for people to remain vigilant.
This article highlights the top reported spam phone numbers in the UK for 2025, as reported by users and call-blocking services. These numbers have been flagged for suspicious, fraudulent, or harassing activity. We’ll provide detailed insights into each number, including the nature of the scam or nuisance calls, patterns of reports, and advice on how to handle them.
Table of Top Reported Spam Numbers (2025)
| Phone Number | Type of Spam | Common Tactic | Risk Level | Action Recommended |
| 0208 058 2684 | Amazon Scam | Fake orders & refund requests | High | Block & report |
| 0331 630 7362 | Bank Fraud | Claims to be from bank security | High | Do not share info |
| 07520 615358 | HMRC Tax Scam | Threats of arrest for tax evasion | Very High | Report to HMRC |
| 01438 989236 | Insurance Sales | Pushy car insurance deals | Medium | Block if unsolicited |
| 01482 293827 | Energy Switching Scam | Claims to lower energy bills | Medium | Avoid sharing details |
| 0203 994 0750 | Cryptocurrency Scam | Investment fraud offers | High | Block & avoid engaging |
| 07418 370376 | Missed Call Scam | Hangs up after one ring | Medium | Don’t call back |
| 01623 205017 | Fake Surveys | Collecting personal data | Medium | Ignore & block |
| 07701 407206 | O2 Phishing Call | Fake discounts or upgrades | High | Verify via official app |
| 0204 502 9385 | Tech Support Scam | “Microsoft” support impersonation | Very High | Hang up immediately |
Detailed Breakdown of Reported Numbers
0208 058 2684 – Amazon Scam Call
This number has been widely reported for impersonating Amazon customer support. Callers often claim there has been a suspicious purchase on your Amazon account—typically a high-value item like an iPhone or MacBook—and offer to “help you secure your account.”
Their real aim? Gaining access to your financial details or computer through remote access software.
Advice:
If you receive a call from this number, hang up. Never give out your Amazon login or payment details over the phone. Always verify order activity directly in your Amazon account.
0331 630 7362 – Bank Fraud Alert Scam
Posing as your bank’s fraud team, callers from this number may state that there have been suspicious transactions on your account. They’ll ask for your banking login, one-time passcodes, or even urge you to transfer your money to a “safe account.”
Telltale signs include:
- Pressure to act urgently
- Use of banking jargon
- Caller ID spoofing (appears to be your bank)
Advice:
Hang up and call your bank directly using the number on your bank card. Do not trust caller ID.
07520 615358 – HMRC Tax Scam
This number is part of a resurgence of the notorious HMRC scam. Callers often leave automated messages claiming you’re under investigation for tax fraud, and if you don’t respond, you’ll be arrested.
Some versions of the scam ask you to press “1” to speak to a case officer, leading to aggressive attempts to collect personal and financial data.
Advice:
The HMRC will never call you and threaten arrest. If in doubt, contact HMRC directly.
01438 989236 – Insurance Sales Cold Call
Not all spam is malicious. This number has been flagged for repeatedly calling people to push car insurance products, often based on outdated or misused data (e.g., from past accident claims).
While not outright fraudulent, the calls can be aggressive and persistent.
Advice:
If you didn’t request a quote or service, consider blocking this number. Reputable insurers won’t hound you via cold calls.
01482 293827 – Energy Switching Scam
Callers from this number pretend to represent major UK energy suppliers or switching services. They promise cheaper rates or “government-endorsed” schemes. Victims have reported being misled into switching suppliers or signing up for deals they didn’t agree to.
Advice:
Never agree to any change in your energy service over the phone without verifying the company’s credentials independently. Use trusted comparison websites instead.
Check Recent Spamming Numbers:
2030070316: : 0161 968 7065: : 1619687065: : 1614640730: : 1772342898
0203 994 0750 – Cryptocurrency Investment Scam
This number is associated with fraudulent investment offers related to cryptocurrency, forex trading, and other high-risk schemes. Victims report being promised high returns and “guaranteed profits”—an immediate red flag.
Warning signs:
- Unsolicited investment offers
- Use of fake testimonials
- Requests for deposits or bank details
Advice:
Avoid engaging. Report the number to Action Fraud or the FCA (Financial Conduct Authority).
07418 370376 – Missed Call Scam
This number is suspected of operating a missed call scam. The strategy? Call for just one ring and hang up, hoping you’ll call back. If you do, you may be connected to a premium rate line.
Although not always a scam in the traditional sense, it can cost you money.
Advice:
Don’t return calls from unfamiliar numbers, especially mobile numbers with no voicemail.
01623 205017 – Fake Survey Scam
This number is linked to fake surveys allegedly conducted for “research purposes.” These surveys often gather personal details under the guise of harmless questions about your shopping or political views. In reality, they’re building a profile for marketing or more targeted scam attempts.
Advice:
Avoid sharing personal information in unsolicited calls, no matter how friendly they sound.
07701 407206 – Fake O2/Network Provider Call
This number is reported for impersonating O2 and other UK network providers. They typically claim you’re eligible for a huge discount or upgrade, but they need to “verify your identity.” That’s where the scam starts.
Many victims report being tricked into revealing account details or even setting up new phone contracts unknowingly.
Advice:
Always verify any offers via your official mobile provider app or website. Never share your account credentials over the phone.
0204 502 9385 – Tech Support Scam
Callers from this number impersonate Microsoft, claiming your computer has a virus or security breach. They may ask you to:
- Download remote desktop software
- Pay for fake antivirus software
- Share passwords or payment information
This is a classic and dangerous scam that often targets older people or those less familiar with tech.
Advice:
Hang up immediately. Microsoft will never call you proactively for tech support. Do not install any software based on unsolicited calls.
How to Protect Yourself From Spam Calls
Given the growing number of spam and scam calls in 2025, here are a few best practices to safeguard yourself:
- Do not answer unknown numbers. Let them go to voicemail.
- Use call-blocking apps. Services like Truecaller or Hiya help identify and block known spam numbers.
- Enable call protection features from your network provider. Most UK networks offer some form of spam call filtering.
- Report suspicious numbers. Use sites like WhoCalledMe, Action Fraud, or Ofcom.
- Never share personal or financial information over the phone.
- Don’t call back unknown numbers, especially if the call was just one ring.
Why Are Spam Calls Still a Problem in 2025?
Despite regulations and improvements in mobile technology, spam calls persist due to:
- Caller ID spoofing: Making it appear like a local or legitimate number.
- VoIP technology: Enables cheap, mass-dialing systems.
- International call centers: Often outside UK jurisdiction.
- Data breaches: Leaked personal info is used to target individuals.
The UK’s telecom regulators are increasing pressure on carriers to implement stricter controls, such as Caller ID authentication (STIR/SHAKEN standards) and real-time spam flagging. But the battle is ongoing.
What To Do If You Fall Victim
If you’ve already shared information or lost money, take these steps immediately:
- Contact your bank. Freeze your account or card if needed.
- Report to Action Fraud: www.actionfraud.police.uk
- Notify your mobile provider. They may help block the number and protect your account.
- Change compromised passwords if any account info was shared.
- Stay vigilant for further scam attempts or phishing emails.
Conclusion
Staying informed is your first line of defense against spam and scam calls. The numbers listed above represent some of the most reported nuisance and fraud calls in the UK during 2025. But new numbers appear every day, and scammers continue evolving their tactics.
By practicing good phone hygiene and reporting suspicious numbers, you not only protect yourself but also contribute to a safer digital community.
