Legitimate
02 Oct 2025
Black Sheep Utilities calling about our energy renewal.
Community overview
Community rating:
Mixed
3 user reports
First reported 20 Feb 2023
·
Last reported
12 months
ago
About this number
Number formats
- UK format: 020 3434 4936
- International: +44 20 3434 4936
Number details
- Number type: Landline
- Number range allocated to: Hello Telecom (UK) Limited
- Area: London
- Area code: 020
Reported categories
Based on 3 public user reports
Spam
33% (1)
Legitimate
33% (1)
Unknown Caller
33% (1)
User Reports (3)
Unknown Caller
14 Sep 2023
Caller said she is an account manager and works for Blacksheep, she manages the energy accounts.
Spam
20 Feb 2023
Dodgy. I blocked it.
Report this number: 020 3434 4936
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How to Block This Number
On iPhone
- Open the Phone app and go to Recents
- Find the number 020 3434 4936 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 3434 4936
- 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