Unknown Caller
3 months ago
Automated call. Rang 3 times. Not answered as no caller ID
Community overview
Community rating:
Mixed
4 user reports
First reported 15 Apr 2026
·
Last reported
3 months
ago
About this number
Number formats
- UK format: 020 3504 2406
- International: +44 20 3504 2406
Number details
- Number type: Landline
- Number range allocated to: Core Telecom Limited
- Area: London
- Area code: 020
Reported categories
Based on 4 public user reports
Unknown Caller
75% (3)
Scam/Fraud
25% (1)
User Reports (4)
Unknown Caller
6 months ago
Received a message to tell me I'd missed a call from this number, however, phone sound was clearly on and the phone was in my hand. It never rang.
Scam/Fraud
6 months ago
9 seconds of silence in response and they themselves hung up.
Unknown Caller
6 months ago
No response on answering
Reported caller:
?
Report this number: 020 3504 2406
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 3504 2406 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 2406
- 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