Telephone numbers in the United Kingdom
01224 Aberdeen 22 = AB
01244 Chester 24 = CH
01382 Dundee 38 = DU
01387 Dumfries ( mixed ) 38 = DU
01452 Gloucester 45 = GL
01472 Grimsby 47 = GR
01473 Ipswich 47 = IP
01429 Hartlepool 42 = HA
01482 Hull 48 = HU
01539 Kendal ( mixed ) 53 = KE
01582 Luton 58 = LU
01642 Teesside or Middlesbrough 64 = MI
01670 Morpeth 67 = MP
01697 Brampton , North West ( mixed ) 69 = NW
01733 Peterborough 73 = PE
01736 Penzance 73 = PE
01772 Preston 77 = PR
01792 Swansea 79 = SW
01793 Swindon 79 = SW
01854 Ullapool 85 = UL
01947 Whitby 94 = WH
Format -- Geographic numbering
Geographic telephone numbers in the UK always have nine or ten digits after the 0 trunk code or +44 international dialling prefix . Four-digit area codes [ edit ] Four-digit area codes have either six-digit subscriber numbers or a mix of five- and six-digit subscriber numbers . ( 01xxx ) xxxxxx This is the format used by most areas . It has a four-digit area code ( after the initial zero ) and a six digit subscriber number , and is known as 4+6 format . These area codes were changed by adding a `` 1 '' directly after the initial zero as a part of PhONEday in 1995 . Just short of 581 areas use this format , and the area codes range from 01200 to 01998 . Almost all ( 01xxx ) area codes now have only six digit subscriber numbers , but a small number of these areas also have some subscriber numbers only five digits in length ( see next section ) .
Telephone numbers in the United Kingdom are administered by the UK government's Office of Communications (Ofcom). For this purpose Ofcom established a telephone numbering plan, known as the National Telephone Numbering Plan, which is the system for assigning telephone numbers to subscriber stations. The numbers are of variable length. Local numbers are supported from land-lines, or numbers can be dialled with a '0'-lead prefix that denotes either a geographical region or another service. Cell phone numbers have their own prefixes which are not geographical and are completely portable between providers.