United Kingdom

Number Code Allocated To Number Length Notes
01723 20xxxx Virgin Media Limited 4+6 F-Digit '4,5,7'
01723 21xxxx Inclarity plc 4+6 F-Digit '2'
01723 22xxxx Net Solutions Europe Limited 4+6 F-Digit '2'
01723 23xxxx Cable & Wireless UK 4+6
01723 24xxxx Skycom Ltd 4+6 F-Digit '2'
01723 25xxxx C3 Europe Limited 4+6 F-Digit '3'
01723 26xxxx Freshtel UK Limited 4+6
01723 27xxxx Syntec UK Ltd 4+6
01723 28xxxx Telephony Services Limited 4+6 F-Digit '2'
01723 29xxxx Coms.Com Ltd 4+6 F-Digit '3'
01723 30xxxx Orange Home UK Plc 4+6 F-Digit '0'
01723 31xxxx LogicStar Limited 4+6
01723 32xxxx Telephony Services Limited 4+6
01723 33xxxx Gamma Telecom Holdings Ltd 4+6
01723 34xxxx BT 4+6
01723 34xxxx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 35xxxx BT 4+6
01723 35xxxx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 36xxxx BT 4+6
01723 36xxxx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 37xxxx BT 4+6
01723 38xxxx BT 4+6
01723 38xxxx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 390xxx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 3950xx MYFIL BT, Filey (North Yorkshire) 4+6
01723 3951xx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 3959xx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 3962xx MYFIL BT, Filey (North Yorkshire) 4+6
01723 3965xx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 397xxx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 39xxxx BT 4+6
01723 40xxxx TelNG Limited 4+6 F-Digit '2'
01723 41xxxx Frontier Systems Ltd 4+6 F-Digit '3'
01723 42xxxx InTechnology Plc 4+6 F-Digit '2'
01723 43xxxx Localphone Limited 4+6 F-Digit '0'
01723 44xxxx Opal Telecom Limited 4+6 F-Digit '8'
01723 45xxxx Teledesign plc 4+6 F-Digit '2'
01723 46xxxx Coralbridge Ltd 4+6 F-Digit '0'
01723 47xxxx VoIP-Un Limited 4+6 F-Digit '0'
01723 48xxxx Nationwide Telephone Assistance Ltd 4+6 F-Digit '0'
01723 49xxxx Resilient Networks Plc 4+6 F-Digit '9'
01723 500xxx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 502xxx MYCAY BT, Cayton Bay (North Yorkshire) 4+6
01723 503xxx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 505xxx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 506xxx MYSCA BT, Scarborough (Yorkshire - North) 4+6
01723 50xxxx BT 4+6
01723 51xxxx BT 4+6
01723 51xxxx MYFIL BT, Filey (North Yorkshire) 4+6
01723 52xxxx Danemere Street Creative 4+6
01723 53xxxx Spitfire Network Services Ltd 4+6 F-Digit '7'
01723 54xxxx T.T.N.C. Limited 4+6 F-Digit '0,1,2,3,4,5,6,7,8,9'
01723 55xxxx TG Support Limited 4+6
01723 56xxxx Pipemedia Ltd 4+6
01723 57xxxx Thus Plc 4+6
01723 58xxxx BT 4+6
01723 58xxxx MYCAY BT, Cayton Bay (North Yorkshire) 4+6
01723 59xxxx FleXtel Limited 4+6
01723 60xxxx Net-Work Internet Ltd 4+6 F-Digit '0'
01723 61xxxx O-Bit Telecom Limited 4+6 F-Digit '7'
01723 620xxx Known Future Limited 4+6
01723 621xxx IPV6 Limited 4+6
01723 622xxx Telswitch Limited 4+6
01723 623xxx 3C Limited 4+6
01723 624xxx INET Telecoms Ltd (Voipfone) 4+6
01723 625xxx Solutios Limited 4+6
01723 626xxx Telecom2 Ltd 4+6
01723 627xxx Starcomm Ltd 4+6
01723 628xxx Voxbone SA 4+6
01723 629xxx Mars Communications Limited 4+6
01723 630xxx Instant Telecommunications Ltd 4+6
01723 631xxx Switch Services Ltd 4+6
01723 632xxx Mundio Mobile Limited 4+6
01723 633xxx CFL Communications Limited 4+6
01723 634xxx Nexus Telecommunications plc 4+6
01723 635xxx VTL (UK) Limited 4+6
01723 636xxx Invomo Ltd 4+6
01723 637xxx Wight Cable 2005 Ltd 4+6
01723 638xxx i-Net Communications Group Plc 4+6
01723 644xxx Orbis Telecom 4+6
01723 80xxxx TELSTRA EUROPE LIMITED 4+6
01723 81xxxx Magrathea Telecommunications Limited 4+6
01723 82xxxx Affiniti Integrated Solutions Ltd 4+6
01723 83xxxx Edge Telecom Ltd 4+6
01723 84xxxx Cable & Wireless Plc 4+6
01723 85xxxx BT 4+6
01723 85xxxx MYSNN BT, Snainton (North Yorkshire) 4+6
01723 860xxx MYCAY BT, Cayton Bay (North Yorkshire) 4+6
01723 862xxx MYWAY BT, West Ayton (North Yorkshire) 4+6
01723 866xxx MYWAY BT, West Ayton (North Yorkshire) 4+6
01723 867xxx MYWAY BT, West Ayton (North Yorkshire) 4+6
01723 86xxxx BT 4+6
01723 87xxxx BT 4+6
01723 87xxxx MYCLO BT, Cloughton (North Yorkshire) 4+6
01723 88xxxx BT 4+6
01723 88xxxx MYHAC BT, Hackness (North Yorkshire) 4+6
01723 89xxxx BT 4+6
01723 89xxxx MYHUM BT, Hunmanby (North Yorkshire) 4+6