United Kingdom

Number Code Allocated To Number Length Notes
01237 20xxxx Localphone Limited 4+6 F-Digit '0'
01237 21xxxx Starcomm Ltd 4+6 F-Digit '0'
01237 22xxxx Teledesign plc 4+6 F-Digit '2'
01237 23xxxx Opal Telecom Limited 4+6 F-Digit '8'
01237 24xxxx Coralbridge Ltd 4+6 F-Digit '0'
01237 25xxxx VoIP-Un Limited 4+6 F-Digit '0'
01237 26xxxx Voxbone SA 4+6 F-Digit '8'
01237 27xxxx Frontier Systems Ltd 4+6 F-Digit '3'
01237 28xxxx Timico Limited 4+6 F-Digit '8'
01237 29xxxx O-Bit Telecom Limited 4+6 F-Digit '7'
01237 30xxxx Net-Work Internet Ltd 4+6 F-Digit '0'
01237 31xxxx Telecom2 Ltd 4+6 F-Digit '6'
01237 32xxxx Nationwide Telephone Assistance Ltd 4+6 F-Digit '0'
01237 33xxxx Telswitch Limited 4+6 F-Digit '0'
01237 34xxxx Callagenix Ltd 4+6 F-Digit '0'
01237 35xxxx Tiscali UK Limited 4+6 F-Digit'0'
01237 36xxxx Solutios Limited 4+6 F-Digit '2'
01237 37xxxx 3C Limited 4+6 F-Digit '2'
01237 38xxxx Skycom Ltd 4+6 F-Digit '2'
01237 39xxxx IPV6 Limited 4+6 F-Digit '0'
01237 40xxxx Magrathea Telecommunications Limited 4+6
01237 41xxxx Inclarity plc 4+6
01237 42xxxx BT 4+6
01237 42xxxx WWBIDE BT, Bideford (Devon) 4+6
01237 43xxxx BT 4+6
01237 43xxxx WWCLOV BT, Clovelly (Devon) 4+6
01237 44xxxx BT 4+6
01237 44xxxx WWHART BT, Hartland (Devon) 4+6
01237 45xxxx BT 4+6
01237 45xxxx WWHCRX BT, Horns Cross (Devon) 4+6
01237 46xxxx Citrus Telecommunications Ltd 4+6
01237 47xxxx BT 4+6
01237 47xxxx WWBIDE BT, Bideford (Devon) 4+6
01237 48xxxx Telephony Services Limited 4+6 F-Digit '8'
01237 49xxxx BT 4+6
01237 49xxxx WWBIDE BT, Bideford (Devon) 4+6
01237 50xxxx Mars Communications Limited 4+6 F-Digit '0'
01237 51xxxx Instant Telecommunications Ltd 4+6 F-Digit '0'
01237 52xxxx INET Telecoms Ltd (Voipfone) 4+6 F-Digit '0'
01237 53xxxx Telecoms World Plc 4+6 F-Digit '0'
01237 54xxxx Nexus Telecommunications plc 4+6 F-Digit '0'
01237 55xxxx Switch Services Ltd 4+6 F-Digit '0'
01237 56xxxx Mundio Mobile Limited 4+6 F-Digit '6'
01237 57xxxx CFL Communications Limited 4+6 F-Digit '0'
01237 58xxxx TeleWare PLC 4+6 F-Digit '3'
01237 59xxxx Known Communications Limited 4+6 F-Digit '0'
01237 60xxxx TG Support Limited 4+6
01237 61xxxx TELSTRA EUROPE LIMITED 4+6
01237 62xxxx Orange Home UK Plc 4+6 F-Digit '0'
01237 63xxxx Freshtel UK Limited 4+6 F-Digit '0'
01237 64xxxx InTechnology Plc 4+6 F-Digit '2'
01237 65xxxx Danemere Street Creative 4+6 F-Digit '2'
01237 66xxxx T.T.N.C. Limited 4+6 F-Digit '1,2,3'
01237 67xxxx Known Future Limited 4+6 F-Digit '7'
01237 68xxxx Virgin Media Limited 4+6 F-Digit '4,5'
01237 69xxxx TelNG Limited 4+6 F-Digit '2'
01237 80xxxx Cable & Wireless UK 4+6
01237 81xxxx LogicStar Limited 4+6
01237 82xxxx FleXtel Limited 4+6
01237 83xxxx C3 Europe Limited 4+6
01237 84xxxx Spitfire Network Services Ltd 4+6 F-Digit '7'
01237 85xxxx Verizon UK Ltd 4+6 F-Digit '1'
01237 86xxxx Syntec UK Ltd 4+6
01237 87xxxx Gamma Telecom Holdings Ltd 4+6
01237 88xxxx Edge Telecom Ltd 4+6
01237 89xxxx Net Solutions Europe Limited 4+6