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How to dial Chelmsford
Within the UK
01245
Use the full area code before the local subscriber number.
From outside the UK
+44 1245
Use +44 and remove the leading zero from the area code.
An area-code match describes the number range, not the caller's identity or current physical location. Caller ID can also be spoofed.
Reported numbers in the 01245 Chelmsford area
22 recently reported complete numbers shown. Up to 30 numbers, ordered by their latest approved public report, with ten per page.
A shared range does not establish the same caller or organisation.
Called six times, asking to speak to a different person each time. We politely told them we were not interested, but they just laughed. It appears to be some ki...
19 Aug 2026
missed called from them but my number was blocked so not sure who they are - suspicious that no incoming calls allowed so obviously a call centre
8 Jun 2026
rings on and on, is probably a software originated call and may not even be Chelmsford.
Avoid at all costs
28 Apr 2026
Annoying and telesales
17 Apr 2026
The caller is telemarketer with a very strong Indian accent. Spam.
14 Apr 2026
Solar power sales call
12 Mar 2026
Sileycall.
24 Feb 2026
Keeps ringing me. It goes to answer phone. No message left
22 Dec 2025
01245330865 knows all identity clearly hacking and manipulation of o2 been hidden in the background since I opened the O2 account. Trying to convince me they ca...
16 Dec 2025
Scam call attempt
10 Dec 2025
Source and review
This page uses Ofcom telephone area codes area-code information retrieved on 3 September 2026.
View the source or tell us about a correction .