01740 area code: Sedgefield
01740 is the UK dialling code for Sedgefield, in County Durham, England. Numbers are 01740 followed by 6 digits.
- Area
- Sedgefield
- Where
- County Durham, England
- Written as
- 01740 xxxxxx
- Digits in a full number
- 11, including the 0
- Calling from abroad
- +44 1740 xxxxxx
- Phone companies holding ranges
- 88 (Ofcom allocation data). This doesn’t show which company a particular number is with, or who uses it.
Where 01740 is
Sedgefield is a town in County Durham, England.
Could it be someone you know?
A number showing 01740 might look familiar. Check the full number before trusting the caller. It can help to think whether you know someone in or around Sedgefield, Hartlepool or Darlington, have used a business there, booked or applied for something nearby, or are expecting a callback.
Codes near Sedgefield
Straight-line distance from Sedgefield.
Does 01740 tell me who called?
No. 01740 is assigned to Sedgefield, 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 88 phone companies hold ranges of 01740 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 01740 numbers
Nobody has reported an 01740 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