01245 area code: Chelmsford
01245 is the UK dialling code for Chelmsford, in England. Numbers are 01245 followed by 6 digits.
- Area
- Chelmsford
- Where
- England
- Written as
- 01245 xxxxxx
- Digits in a full number
- 11, including the 0
- Calling from abroad
- +44 1245 xxxxxx
- Phone companies holding ranges
- 114 (Ofcom allocation data). This doesn’t show which company a particular number is with, or who uses it.
Where 01245 is
Chelmsford is a city in England.
Could it be someone you know?
A number showing 01245 might look familiar. Check the full number before trusting the caller. It can help to think whether you know someone in or around Chelmsford, Maldon or Braintree, have used a business there, booked or applied for something nearby, or are expecting a callback.
Codes near Chelmsford
Straight-line distance from Chelmsford.
Does 01245 tell me who called?
No. 01245 is assigned to Chelmsford, but that doesn’t prove who is calling or where they are. Caller ID can be faked, a number keeps its code when it moves provider, and 114 phone companies hold ranges of 01245 numbers. Search the full number to see what people have reported about it and which phone company its range was given to.
Caller says they’re your bank, HMRC, the police or a courier? Hang up and call a number you trust, from your card, a letter or their website, or dial 159 for most UK banks.
Reported 01245 numbers
Nobody has reported an 01245 number to us yet. If one has been calling you, report it so the next person sees it.
Codes, code lengths and provider counts from Ofcom’s numbering data, downloaded 23 September 2026. Places from Wikidata. All UK area codes · Who called me? · Stop spam calls