Unknown Caller
5 months ago
No one there when I answered.
Community overview
Community rating:
Mixed
4 user reports
First reported 1 Apr 2026
·
Last reported
5 months
ago
User Reports (4)
Unknown Caller
5 months ago
Picked up phone. No one spoke then went back to dialling tone.
Scam/Fraud
5 months ago
Said they are from some unknown named energy firm. When k asked who did they want to speak to as they called me they hung up. If they are a real company they broke the Telepreference list rules?
Reported caller:
She didn’t say
Unknown Caller
5 months ago
Energy advisior in your area?
Report this number
↑ Back to reportsHow to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 3504 4834 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 3504 4834
- 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 registrationAbout this number
Number formats
- UK format: 020 3504 4834
- International: +44 20 3504 4834
Number details
- Number type: Landline
- Number range allocated to: Core Telecom Limited
- Area: London
- Area code: 020