Scam/Fraud
10 Oct 2025
Calls to offer 45% discount on O2 bill when I am not with O2 and there for know this was a scam
Community overview
Community rating:
Negative
4 user reports
First reported 15 Sep 2025
·
Last reported
12 months
ago
About this number
Number formats
- UK format: 020 4604 4856
- International: +44 20 4604 4856
Number details
- Number type: Landline
- Number range allocated to: Colt Technology Services
- Area: London
- Area code: 020
Reported categories
Based on 4 public user reports
Scam/Fraud
25% (1)
Spam
25% (1)
Telemarketer
25% (1)
Unknown Caller
25% (1)
User Reports (4)
Telemarketer
27 Sep 2025
With Indian accent saying she’s calling from Three offering 30-40% discount of my bill. Hung up right away
Spam
15 Sep 2025
My incoming call from this number advised suspected scam so I did not answer I have blocked the number. But came on here to double check and I'm happy to believe it's some kind of scam.
Unknown Caller
15 Sep 2025
02046044856 called back immediately after missed call - two hellos, then hung up
Report this number: 020 4604 4856
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 4604 4856 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 4604 4856
- 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)
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Learn more about TPS registration