Unknown Caller
03 Dec 2025
I didn’t answer the call as I didn’t know the number.
Community overview
Community rating:
Negative
7 user reports
First reported 13 Nov 2025
·
Last reported
10 months
ago
About this number
Number formats
- UK format: 020 4583 2447
- International: +44 20 4583 2447
Number details
- Number type: Landline
- Number range allocated to: Colt Technology Services
- Area: London
- Area code: 020
Reported categories
Based on 7 public user reports
Spam
43% (3)
Unknown Caller
43% (3)
Scam/Fraud
14% (1)
User Reports (7)
Unknown Caller
02 Dec 2025
no response when i picked up
Unknown Caller
29 Nov 2025
Called but I didn’t pick up, tried to call back and no one picking up..
Spam
28 Nov 2025
They have told me they call to ask if there is everything fine with O2 services...
Scam/Fraud
20 Nov 2025
Randomly called. Never answer unknown numbers.
Spam
13 Nov 2025
I didn’t answer it as it came up suspected spam on the caller id. Time of the call was 11:26am
Spam
13 Nov 2025
I didn't answer it but they left a msg saying nothing just a noise i had the call at 13.07 pm
Report this number: 020 4583 2447
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 4583 2447 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 4583 2447
- 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