Use the full area code before the local subscriber number.
UK geographic telephone code
01529 area code: Sleaford
The 01529 dialling code is associated with Sleaford.
How to dial Sleaford
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.
Recent reports for 01529 numbers
-
Not known - blocked. Don't know anyone in Sleaford.
Source and review
This page uses Ofcom telephone area codes area-code information retrieved on 3 September 2026.