Scam/Fraud
21 Nov 2025
Said that they was calling from three but I’m not on three network. Apparently I qualified for a discount because of the phones lines going down
Community overview
Community rating:
Negative
9 user reports
First reported 31 Oct 2025
·
Last reported
10 months
ago
About this number
Number formats
- UK format: 020 4583 8640
- International: +44 20 4583 8640
Number details
- Number type: Landline
- Number range allocated to: Colt Technology Services
- Area: London
- Area code: 020
Reported categories
Based on 9 public user reports
Unknown Caller
44% (4)
Scam/Fraud
33% (3)
Spam
22% (2)
User Reports (9)
Scam/Fraud
21 Nov 2025
Three calls today which I didnt pick up. They called me before on a similar number saying my contract with 3 was running out. False.
Unknown Caller
19 Nov 2025
They called me but I did not pick up because I don't know anyone with a landlines who would call me from London and the call did not last for 30 seconds, it went cut so quickly. I did not take the call, I believe it's a scam!
Reported caller:
Colt Technology Services
Spam
13 Nov 2025
17.00 call, not a robot caller
Unknown Caller
08 Nov 2025
Called twice however I didnt answer ether of them as I was not in the room. Each call only rang for less than about three rings as I would have heard
Scam/Fraud
08 Nov 2025
Claimed to be from three to talk about my contract but I’m not on three. Scam!
Unknown Caller
05 Nov 2025
I also have no idea what kind of company Colt Technology is, why they called me or how they obtained my number!
Spam
03 Nov 2025
Called twice and declined twice, then immediately called a third time. Answered this time and it was claiming to be for Three mobile, I’m not associated with Three mobile.
Unknown Caller
31 Oct 2025
Repeated calls this week.no message left. I have no idea who Colt Technology is or why they would be calling me.
Report this number: 020 4583 8640
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 4583 8640 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 8640
- 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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