Scam/Fraud
3 months ago
Not in my address book so didn't answer, and no voicemail was left. I therefore assume it is spam.
Community overview
Community rating:
Negative
7 user reports
First reported 23 Jun 2026
·
Last reported
3 months
ago
About this number
Number formats
- UK format: 020 3504 2751
- International: +44 20 3504 2751
Number details
- Number type: Landline
- Number range allocated to: Core Telecom Limited
- Area: London
- Area code: 020
Recent activity
UK visits
User Reports
Last 30 days: 10 UK visits and 0 public reports.
Reported categories
Based on 7 public user reports
Unknown Caller
43% (3)
Scam/Fraud
29% (2)
Spam
14% (1)
Robocall
14% (1)
User Reports (7)
Scam/Fraud
3 months ago
Rang once and hung up Spam
Unknown Caller
3 months ago
hung up after call screened
Robocall
3 months ago
Silent call probably a robodialer and spoofed number
Spam
3 months ago
Said nothing
Unknown Caller
3 months ago
Nothing said
Unknown Caller
3 months ago
bro said nothing
Reported caller:
Robot
Report this number: 020 3504 2751
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 3504 2751 and tap the info icon (i)
- Scroll down and tap Block this Caller
- Confirm by tapping Block Contact
On Android
- Open the Phone app and tap the 3-dot menu
- Go to Call history or Recents
- Long press on 020 3504 2751
- Select Block number or Block/report spam
On Landline Phones
Several options are available for UK landlines:
- BT Call Protect - free for BT customers
- TalkTalk CallSafe - free for TalkTalk customers
- Call blocking devices like CPR Call Blocker (available on Amazon)
Register with TPS (Telephone Preference Service)
The TPS is a free service for UK consumers that allows you to opt out of unsolicited sales and marketing calls.
Learn more about TPS registration