United Kingdom

Number Code Allocated To Number Length Notes
01431 20xxxx VoIP-Un Limited 4+6 F-Digit '0'
01431 21xxxx Timico Limited 4+6 F-Digit '8'
01431 22xxxx Net-Work Internet Ltd 4+6 F-Digit '2'
01431 23xxxx Telecom2 Ltd 4+6 F-Digit '6'
01431 24xxxx Telswitch Limited 4+6 F-Digit '0'
01431 25xxxx 3C Limited 4+6 F-Digit '2'
01431 26xxxx Voxbone SA 4+6 F-Digit '8'
01431 27xxxx Solutios Limited 4+6 F-Digit '2'
01431 28xxxx O-Bit Telecom Limited 4+6 F-Digit '7'
01431 29xxxx IPV6 Limited 4+6 F-Digit '0'
01431 30xxxx Mars Communications Limited 4+6 F-Digit '0'
01431 31xxxx Instant Telecommunications Ltd 4+6 F-Digit '0'
01431 32xxxx Mundio Mobile Limited 4+6 F-Digit '6'
01431 33xxxx CFL Communications Limited 4+6 F-Digit '0'
01431 34xxxx Known Communications Limited 4+6 F-Digit '0'
01431 35xxxx Nexus Telecommunications plc 4+6 F-Digit '0'
01431 36xxxx INET Telecoms Ltd (Voipfone) 4+6 F-Digit '7'
01431 70xxxx Citrus Telecommunications Ltd 4+6 F-Digit '2'
01431 71xxxx Inclarity plc 4+6 F-Digit '2'
01431 72xxxx T.T.N.C. Limited 4+6 F-Digit '0,1,2,3,4,5,6,7,8,9
01431 73xxxx Danemere Street Creative 4+6
01431 74xxxx Orange Home UK Plc 4+6 F-Digit '0'
01431 75xxxx Known Future Limited 4+6 F-Digit '5'
01431 76xxxx Edge Telecom Ltd 4+6
01431 77xxxx FleXtel Limited 4+6
01431 78xxxx LogicStar Limited 4+6
01431 79xxxx TelNG Limited 4+6 F-Digit '2'
01431 80xxxx Virgin Media Limited 4+6
01431 81xxxx Syntec UK Ltd 4+6
01431 82xxxx BT 4+6
01431 82xxxx NSHEL BT, Helmsdale (Highland) 4+6
01431 83xxxx BT 4+6
01431 83xxxx NSKBC BT, Kinbrace (Highland) 4+6
01431 84xxxx C3 Europe Limited 4+6 F-Digit '1'
01431 85xxxx Localphone Limited 4+6 F-Digit '0'
01431 86xxxx Skycom Ltd 4+6 F-Digit '2'
01431 87xxxx InTechnology Plc 4+6 F-Digit '2'
01431 88xxxx Net Solutions Europe Limited 4+6 F-Digit '8'
01431 89xxxx Frontier Systems Ltd 4+6 F-Digit '3'
01431 90xxxx Telephony Services Limited 4+6 F-Digit '5'
01431 91xxxx Magrathea Telecommunications Limited 4+6
01431 92xxxx Gamma Telecom Holdings Ltd 4+6
01431 93xxxx Starcomm Ltd 4+6 F-Digit '0'
01431 94xxxx Coralbridge Ltd 4+6 F-Digit '0'
01431 95xxxx Opal Telecom Limited 4+6 F-Digit '8'
01431 96xxxx Nationwide Telephone Assistance Ltd 4+6 F-Digit '0'
01431 97xxxx Spitfire Network Services Ltd 4+6 F-Digit '7'
01431 98xxxx Teledesign plc 4+6 F-Digit '2'