Use the full area code before the local subscriber number.
UK geographic telephone code
01603 area code: Norwich
The 01603 dialling code is associated with Norwich.
How to dial Norwich
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 01603 numbers
-
Clearly a scam call. Be cautious and avoid giving the caller any personal or financial information.
-
Rang and went to voicemail then dropped out. No message left.
-
BMW (Group 1) calling for feedback on recent service and MOT
-
no vm left, called twice now.
-
COMPANY CALLED SURE FOR LIFE
-
Follow up call after BMW car serviced. Wasn't expected but was quick so (unusually for me!) I obliged.
-
Cold call saying it's BT to try and tell a phone system Asking plenty of questions and he found it difficult to take no for an answer three time.
-
Group 1 BMW following up on appointment asking for feedback
-
Double glazing
-
Have had 8 silent calls from this number in last 6 weeks. usually 2 calls on same day. no response or a hang up when tried to return the call. Not sure how suspicious this is but weird and has become intimidating.
Source and review
This page uses Ofcom telephone area codes area-code information retrieved on 3 September 2026.