Unknown Caller
28 Nov 2025
One-ring-sting
Community overview
Community rating:
Mixed
3 user reports
First reported 23 Oct 2025
·
Last reported
10 months
ago
About this number
Number formats
- UK format: 020 4621 9795
- International: +44 20 4621 9795
Number details
- Number type: Landline
- Number range allocated to: Colt Technology Services
- Area: London
- Area code: 020
Recent activity
UK visits
User Reports
Last 30 days: 7 UK visits and 0 public reports.
Reported categories
Based on 3 public user reports
Scam/Fraud
33% (1)
Spam
33% (1)
Unknown Caller
33% (1)
User Reports (3)
Spam
23 Oct 2025
Classic ghost dial. Likely an automated system pinging numbers—either a call-centre auto-dialer testing if your line’s active or a spoofed callback trap waiting to see if you’ll call back (which confirms your number as “live” for spam lists).
Scam/Fraud
23 Oct 2025
Rings for a very short amount of time, no time to answer and they just hang up.
Report this number: 020 4621 9795
↑ Back to reportsDid this number contact you?
You’ve already submitted a report for this number.
Your report may still be going through moderation before it appears publicly.
Your report
How did they contact you?
How would you describe the contact?
Please do not include full names, private addresses, or abusive, hateful, or defamatory content. Please read our Community Standards before posting.
Thank you. Your report has been received.
Before appearing publicly on the site, reports may be reviewed and checked as part of our moderation process.
How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 4621 9795 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 4621 9795
- 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