Unknown Caller
24 Dec 2025
On answering, no-one speaks as if there is no-one there. I hung up after about 20 secs
Reported caller:
Unknown
Community overview
Community rating:
Mixed
6 user reports
First reported 10 Nov 2025
·
Last reported
9 months
ago
About this number
Number formats
- UK format: 020 3634 4557
- International: +44 20 3634 4557
Number details
- Number type: Landline
- Number range allocated to: Nexbridge Communications Limited
- Area: London
- Area code: 020
Reported categories
Based on 6 public user reports
Unknown Caller
83% (5)
Scam/Fraud
17% (1)
User Reports (6)
Scam/Fraud
01 Dec 2025
Emergency safety alarm scam. "Free device", but you have to pay a fee of £89.99 a quarter.
Unknown Caller
24 Nov 2025
caller claimed to be calling from medialarm247 regarding personal SOS alarm systems. Medialarm247 has a UK freephone number, so not sure why they would call from any other displayed number. When I advised they had called a TPS registered number so the company was not reputable caller went silent then eventually hung up.
Unknown Caller
13 Nov 2025
Silence initially and then a voice started to speak and it cut off
Unknown Caller
11 Nov 2025
On being told I could not hear they hung up
Unknown Caller
10 Nov 2025
No one speaks then line goes dead
Report this number: 020 3634 4557
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 3634 4557 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 3634 4557
- Select Block number or Block/report spam
On Landline Phones
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- BT Call Protect - free for BT customers
- TalkTalk CallSafe - free for TalkTalk customers
- Call blocking devices like CPR Call Blocker (available on Amazon)
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