Unknown Caller
05 Mar 2024
When picking up the phone connection is terminated. When let ringing this number calls a second time.
Community overview
Community rating:
Limited data
1 user report · Reported over 2 years ago
User Reports (1)
Report this number
How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 4552 3535 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 4552 3535
- 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 registrationAbout this number
Number formats
- UK format: 020 4552 3535
- International: +44 20 4552 3535
Number details
- Number type: Landline
- Number range allocated to: Colt Technology Services
- Area: London
- Area code: 020