01865 603 Dialing Code


Dialing Code 01865 603 is part of Area Code 01865, which covers Oxford and the surrounding area.

The majority of numbers in the 01865 Area Code belong to normal landlines in Oxford, but it is possible that these numbers are being used elsewhere as virtual numbers.

There are multiple telephone companies operating in the 01865 Area Code and they are allocated blocks of numbers, which can be identified by the digits following the Area Code. In this case, the digits 603 after the area code indicate that the range of numbers was originally allocated to Colt Technology Services on 15 November 2022, although due to number portability, individual numbers within this range may now be allocated to other operators.

01865 area code information

Area Code: 01865
Location: Oxford
Dialing Code: 01865 603
Provider: Colt Technology Services
Date range allocated: 15 November 2022
Call Costs: Normal landline rate
Area code required for local calls: No
Local number length: 6
Number format: 01865 603###
International number format: +44 1865 603###
Last code change: April 1995 from 0865.