United Kingdom

Number Code Allocated To Number Length Notes
01531 20xxxx Coralbridge Ltd 4+6 F-Digit '0'
01531 21xxxx Frontier Systems Ltd 4+6 F-Digit '3'
01531 22xxxx VoIP-Un Limited 4+6 F-Digit '0'
01531 23xxxx Telephony Services Limited 4+6 F-Digit '2'
01531 24xxxx Opal Telecom Limited 4+6 F-Digit '8'
01531 25xxxx Primus Telecommunications 4+6 F-Digit '1'
01531 26xxxx Timico Limited 4+6 F-Digit '8'
01531 27xxxx O-Bit Telecom Limited 4+6 F-Digit '7'
01531 28xxxx Nationwide Telephone Assistance Ltd 4+6 F-Digit '0'
01531 29xxxx Net-Work Internet Ltd 4+6 F-Digit '0'
01531 30xxxx Inclarity plc 4+6 F-Digit '2'
01531 31xxxx Known Future Limited 4+6 F-Digit '1'
01531 32xxxx Virgin Media Limited 4+6 F-Digit '4,5'
01531 33xxxx Net Solutions Europe Limited 4+6 F-Digit '3'
01531 34xxxx T.T.N.C. Limited 4+6 F-Digit '0,1,2,3,4,5,6,7,8,9'
01531 35xxxx Orange Home UK Plc 4+6 F-Digit '0'
01531 36xxxx TelNG Limited 4+6 F-Digit '2'
01531 37xxxx Spitfire Network Services Ltd 4+6 F-Digit '7'
01531 38xxxx Localphone Limited 4+6 F-Digit '0'
01531 39xxxx Teledesign plc 4+6 F-Digit '2'
01531 40xxxx Telecom2 Ltd 4+6 F-Digit '6'
01531 41xxxx Telswitch Limited 4+6 F-Digit '0'
01531 42xxxx Starcomm Ltd 4+6 F-Digit '0'
01531 43xxxx Voxbone SA 4+6 F-Digit '8'
01531 44xxxx 3C Limited 4+6 F-Digit '2'
01531 45xxxx Solutios Limited 4+6 F-Digit '2'
01531 46xxxx Mars Communications Limited 4+6 F-Digit '0'
01531 47xxxx IPV6 Limited 4+6 F-Digit '0'
01531 48xxxx Instant Telecommunications Ltd 4+6 F-Digit '0'
01531 49xxxx Nexus Telecommunications plc 4+6 F-Digit '0'
01531 50xxxx Switch Services Ltd 4+6 F-Digit '0'
01531 51xxxx Mundio Mobile Limited 4+6 F-Digit '6'
01531 52xxxx CFL Communications Limited 4+6 F-Digit '0'
01531 53xxxx Danemere Street Creative 4+6 F-Digit '2'
01531 54xxxx Known Communications Limited 4+6 F-Digit '0'
01531 60xxxx LogicStar Limited 4+6
01531 6135xx SSNWT BT, Newent (Gloucestershire) 4+6
01531 61xxxx BT 4+6
01531 62xxxx Cable & Wireless UK 4+6
01531 63xxxx BT 4+6
01531 64xxxx BT 4+6
01531 65xxxx BT 4+6
01531 65xxxx WNBRB BT, Bromesberrow (Gloucestershire) 4+6
01531 66xxxx BT 4+6
01531 67xxxx BT 4+6
01531 68xxxx Thus Plc 4+6
01531 69xxxx Skycom Ltd 4+6 F-Digit '2'
01531 80xxxx Gamma Telecom Holdings Ltd 4+6
01531 81xxxx Edge Telecom Ltd 4+6
01531 82xxxx BT 4+6
01531 82xxxx SSNWT BT, Newent (Gloucestershire) 4+6
01531 83xxxx InTechnology Plc 4+6
01531 84xxxx FleXtel Limited 4+6
01531 85xxxx TELSTRA EUROPE LIMITED 4+6
01531 86xxxx C3 Europe Limited 4+6 F-Digit '1'
01531 87xxxx Syntec UK Ltd 4+6
01531 88xxxx Magrathea Telecommunications Limited 4+6
01531 89xxxx BT 4+6
01531 89xxxx SSDYK BT, Dymock (Gloucestershire) 4+6