Unknown Caller
31 Jul 2025
Phone flagged as potential fraud so did not answer. No voicemail left
Community overview
Community rating:
Limited data
2 user reports
First reported 31 Jul 2025
·
Last reported
1 year
ago
About this number
Number formats
- UK format: 01821 451021
- International: +44 1821 451021
Number details
- Number type: Landline
- Number range allocated to: Simwood eSMS Limited
- Area: Kinrossie
- Area code: 01821
User Reports (2)
Scam/Fraud
31 Jul 2025
My phone silences numbers but I get around 3 scam calls a day so I would put this in the scam/fraud category.. I block all these unknown numbers
Report this number: 01821 451021
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 01821 451021 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 01821 451021
- 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