With the rapid digitalization of communication, spam and scam phone calls remain a major nuisance and security threat in the UK. Despite increased regulations and mobile network filtering, scammers are still finding ways to reach unsuspecting individuals through spoofed or persistent spam calls.
In 2025, there has been a notable surge in complaints regarding fraudulent calls, particularly those pretending to be from banks, government bodies, tech support, or even energy companies. These calls range from silent hang-ups to aggressive financial scams. Below is a compilation of the most frequently reported spam phone numbers in the UK this year, based on user-submitted complaints and spam detection data.
Table: Most Reported Spam Phone Numbers in the UK (2025)
| Phone Number | Type of Spam/Scam | Common Tactic/Complaint |
| 02080586756 | Tech Support Scam | Pretending to be Microsoft or IT security teams |
| 02037879203 | HMRC/Tax Scam | Threatening legal action or arrest |
| 02080599760 | Broadband Scam | Claims of issues with your internet connection |
| 08000668919 | Silent Calls / Aggressive Sales | Repeated silent calls or unclear sales offers |
| 02080583736 | Bank Scam | Fake fraud alerts from high-street banks |
| 03316309814 | Energy Switch Scam | Pressuring victims to switch energy providers |
| 02080580693 | Amazon Prime Scam | Fake subscription renewals demanding card info |
| 01615315340 | Pension Scam | Offering early pension release or reviews |
| 02038960346 | Insurance Scam | “Accident claims” calls not based on real data |
| 03333441106 | Loan Scam / Phishing | Offers of fake loans requesting upfront fees |
In-Depth Analysis of Each Number
02080586756 — Tech Support Scam
This number has been widely reported for impersonating Microsoft or other major IT providers. Victims often receive calls stating that their computer has been hacked or infected with a virus. The caller then pressures the user into granting remote access or installing malicious software, leading to potential data theft. Always be wary of unsolicited tech support calls.
02037879203 — HMRC/Tax Scam
A classic but effective scam, this number is linked to impersonators claiming to be from HMRC. Victims are told they owe unpaid taxes and are threatened with arrest if they don’t pay immediately. Some variations include automated messages demanding urgent responses. Remember, HMRC never contacts people by phone in this manner.
02080599760 — Broadband Scam
Callers from this number often claim to be from your broadband provider, such as BT, Virgin Media, or Sky. They warn of supposed “suspicious activity” or speed issues with your internet and offer to “fix it” by gaining access to your router or device. These scams can result in compromised networks and financial loss.
08000668919 — Silent Calls / Aggressive Sales
This number is notorious for repeated silent calls, often with no one speaking on the other end. When the call is answered, it occasionally leads to aggressive sales tactics or poor-quality telemarketing. While not always fraudulent, it remains one of the top nuisances in 2025.
02080583736 — Bank Scam
Reportedly used in impersonation scams involving well-known banks like Barclays, Lloyds, or HSBC. Victims are told there’s suspicious activity on their account and are urged to confirm details or transfer money “for safety.” Remember: no legitimate bank will ask for your PIN or password over the phone.
Check Recent Spamming Numbers:
2870024018: : 3301740216: : 1484599876 : : 2870024945: : 2030340147
03316309814 — Energy Switch Scam
This number has been linked to pressure sales tactics aiming to get people to switch energy providers. Callers claim you’re eligible for lower tariffs, often providing fake numbers and quotes. Some victims were even tricked into giving out personal or billing information.
02080580693 — Amazon Prime Subscription Scam
This scam typically involves a recorded message stating your Amazon Prime subscription will auto-renew unless you press a button to cancel. If you engage, a scammer then attempts to extract your card details under the guise of “cancelling” the subscription. Amazon has warned repeatedly against such calls.
01615315340 — Pension Scam
Targeting older adults, this number is connected with scams offering “free pension reviews” or ways to “unlock” your pension early. These services are illegal without FCA approval and can result in substantial financial loss or even tax penalties.
02038960346 — Insurance / Accident Scam
Often part of the “Have you been in an accident?” script, this number is frequently used by scammy claims companies or fraudsters pretending to help you get compensation. Most of these callers have no real information about you and aim to harvest personal details.
03333441106 — Loan Scam / Advance Fee Fraud
This number is tied to fraudulent loan offers that seem too good to be true. Victims are promised instant approval and then asked for an upfront payment as a “processing fee” or “insurance.” Legitimate loan providers in the UK do not ask for advance payments.
Why Are These Calls So Effective?
These spam calls exploit psychological tactics like urgency, fear, or greed:
- Urgency: “Act now or you’ll be arrested!”
- Fear: “Your account’s been compromised!”
- Greed: “You’ve won a free upgrade or refund!”
They also benefit from:
- Caller ID spoofing (faking UK numbers),
- AI-generated voices to sound more realistic,
- Data leaks that give them partial real information about you.
How to Protect Yourself
Here are some practical steps to shield yourself from spam and scam calls:
Do:
- Hang up if the caller pressures you to act quickly.
- Use your mobile provider’s spam protection service (e.g., EE Call Protect, O2 Call Filter).
- Report the number to Ofcom and Action Fraud.
- Register with the Telephone Preference Service (TPS).
Don’t:
- Share banking or personal information over the phone.
- Follow instructions from unsolicited “tech support.”
- Press buttons or call back suspicious numbers.
Tools to Block or Report Spam Calls
There are several tools available to UK residents:
| Tool | Function | Website |
| Action Fraud | Report fraud and scams | www.actionfraud.police.uk |
| Ofcom | Regulator for telecoms | www.ofcom.org.uk |
| TPS (Telephone Preference Service) | Blocks unsolicited sales calls | www.tpsonline.org.uk |
| Truecaller / Hiya | Caller ID & spam blocking apps | App Store / Google Play |
User Testimonials & Complaints
Many users have taken to forums and consumer review platforms to share experiences with these spam numbers:
- “I got a call from 02080583736 pretending to be from HSBC. They even knew my name. Total scam.”
- “03333441106 offered me a £10,000 loan and asked for £150 upfront. Thankfully I refused.”
- “01615315340 keeps calling me about my pension even though I’m only 35!”
These reports highlight how widespread the issue is and how essential awareness is in fighting back.
Conclusion
As scammers grow more sophisticated, staying informed and vigilant is our best defense. These top reported spam phone numbers in the UK for 2025 serve as a stark reminder of the tactics fraudsters use every day. Recognizing suspicious behavior and understanding common scam patterns can protect not just you, but your friends and family too.
If you receive a call from any of the numbers listed in this article—or a similar unknown number—treat it with caution. Don’t be afraid to hang up, and always verify independently.
