01858 area code: Market Harborough
01858 is the UK dialling code for Market Harborough, in Harborough, England. Numbers are 01858 followed by 6 digits.
- Area
- Market Harborough
- Where
- Harborough, England
- Written as
- 01858 xxxxxx
- Digits in a full number
- 11, including the 0
- Calling from abroad
- +44 1858 xxxxxx
- Phone companies holding ranges
- 92 (Ofcom allocation data). This doesn’t show which company a particular number is with, or who uses it.
Where 01858 is
Market Harborough is a town in Harborough, England.
Could it be someone you know?
A number showing 01858 might look familiar. Check the full number before trusting the caller. It can help to think whether you know someone in or around Market Harborough, Kettering or Leicester, have used a business there, booked or applied for something nearby, or are expecting a callback.
Codes near Market Harborough
Straight-line distance from Market Harborough.
Does 01858 tell me who called?
No. 01858 is assigned to Market Harborough, 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 92 phone companies hold ranges of 01858 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 01858 numbers
Nobody has reported an 01858 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