United Kingdom

Number Code Allocated To Number Length Notes
01666 20xxxx TelNG Limited 4+6 F-Digit '2'
01666 21xxxx Frontier Systems Ltd 4+6 F-Digit '3'
01666 22xxxx Skycom Ltd 4+6 F-Digit '2'
01666 23xxxx Opal Telecom Limited 4+6 F-Digit '8'
01666 24xxxx Teledesign plc 4+6 F-Digit '2'
01666 25xxxx Coralbridge Ltd 4+6 F-Digit '0'
01666 26xxxx Localphone Limited 4+6 F-Digit '0'
01666 27xxxx VoIP-Un Limited 4+6 F-Digit '0'
01666 28xxxx Orange Home UK Plc 4+6 F-Digit '0'
01666 29xxxx Nationwide Telephone Assistance Ltd 4+6 F-Digit '0'
01666 30xxxx Syntec UK Ltd 4+6
01666 31xxxx Freshtel UK Limited 4+6 F-Digit '7'
01666 32xxxx Danemere Street Creative 4+6
01666 33xxxx Gamma Telecom Holdings Ltd 4+6
01666 34xxxx TELSTRA EUROPE LIMITED 4+6
01666 35xxxx Virgin Media Limited 4+6 F-Digit '4,5'
01666 36xxxx IV Response Limited 4+6
01666 37xxxx Spitfire Network Services Ltd 4+6 F-Digit '7'
01666 38xxxx Net Solutions Europe Limited 4+6 F-Digit '8'
01666 39xxxx T.T.N.C. Limited 4+6 F-Digit '0,1,2,3,4,5,6,7,8,9'
01666 40xxxx InTechnology Plc 4+6 F-Digit '2'
01666 41xxxx O-Bit Telecom Limited 4+6 F-Digit '7'
01666 42xxxx Telecom2 Ltd 4+6 F-Digit '6'
01666 43xxxx Timico Limited 4+6 F-Digit '8'
01666 44xxxx Net-Work Internet Ltd 4+6 F-Digit '4'
01666 45xxxx Voxbone SA 4+6 F-Digit '8'
01666 46xxxx Telswitch Limited 4+6 F-Digit '0'
01666 47xxxx Starcomm Ltd 4+6 F-Digit '0'
01666 48xxxx 3C Limited 4+6 F-Digit '2'
01666 49xxxx Known Future Limited 4+6 F-Digit '5'
01666 500xxx SSTTY BT, Tetbury (Gloucestershire) 4+6
01666 508xxx SSHUL BT, Hullavington (Wiltshire) 4+6
01666 50xxxx BT 4+6
01666 51xxxx BT 4+6
01666 51xxxx SSBRW BT, Brinkworth (Wiltshire) 4+6
01666 52xxxx Inclarity plc 4+6
01666 53xxxx Cable & Wireless UK 4+6
01666 54xxxx Edge Telecom Ltd 4+6
01666 5530xx SSMAL BT, Malmesbury (Wiltshire) 4+6
01666 5531xx SSTTY BT, Tetbury (Gloucestershire) 4+6
01666 5534xx SSTTY BT, Tetbury (Gloucestershire) 4+6
01666 5537xx SSMAL BT, Malmesbury (Wiltshire) 4+6
01666 55xxxx BT 4+6
01666 56xxxx Thus Plc 4+6
01666 57xxxx BT 4+6
01666 57xxxx SSCRU BT, Crudwell (Wiltshire) 4+6
01666 58xxxx Verizon UK Ltd 4+6
01666 59xxxx VTL (UK) Limited 4+6
01666 60xxxx Solutios Limited 4+6 F-Digit '2'
01666 61xxxx IPV6 Limited 4+6 F-Digit '0'
01666 62xxxx Mars Communications Limited 4+6
01666 63xxxx Telecoms World Direct Ltd 4+6 F-Digit '0'
01666 64xxxx Instant Telecommunications Ltd 4+6 F-Digit '0'
01666 65xxxx Mundio Mobile Limited 4+6 F-Digit '6'
01666 66xxxx Switch Services Ltd 4+6 F-Digit '0'
01666 67xxxx CFL Communications Limited 4+6 F-Digit '0'
01666 68xxxx Nexus Telecommunications plc 4+6 F-Digit '0'
01666 69xxxx Global Crossing (UK) Ltd 4+6 F-Digit '1'
01666 70xxxx Known Communications Limited 4+6 F-Digit '0'
01666 80xxxx Telephony Services Limited 4+6
01666 81xxxx Magrathea Telecommunications Limited 4+6
01666 82xxxx BT 4+6
01666 82xxxx SSMAL BT, Malmesbury (Wiltshire) 4+6
01666 832xxx SSMAL BT, Malmesbury (Wiltshire) 4+6
01666 837xxx SSHUL BT, Hullavington (Wiltshire) 4+6
01666 83xxxx BT 4+6
01666 840xxx SSSHT BT, Sherston (Wiltshire) 4+6
01666 842xxx SSHUL BT, Hullavington (Wiltshire) 4+6
01666 843xxx SSSHT BT, Sherston (Wiltshire) 4+6
01666 84xxxx BT 4+6
01666 85xxxx LogicStar Limited 4+6
01666 86xxxx BT 4+6
01666 86xxxx SSMIN BT, Minety (Wiltshire) 4+6
01666 87xxxx FleXtel Limited 4+6
01666 88xxxx BT 4+6
01666 88xxxx SSWBT BT, Westonbirt (Gloucestershire) 4+6
01666 89xxxx BT 4+6