United Kingdom

Number Code Allocated To Number Length Notes
01550 20xxxx Frontier Systems Ltd 4+6 F-Digit '3'
01550 21xxxx Nationwide Telephone Assistance Ltd 4+6 F-Digit '0'
01550 22xxxx Teledesign plc 4+6 F-Digit '2'
01550 23xxxx O-Bit Telecom Limited 4+6 F-Digit '7'
01550 24xxxx Telecom2 Ltd 4+6 F-Digit '6'
01550 25xxxx Timico Limited 4+6 F-Digit '8'
01550 26xxxx Telswitch Limited 4+6 F-Digit '0'
01550 27xxxx Starcomm Ltd 4+6 F-Digit '0'
01550 28xxxx Voxbone SA 4+6 F-Digit '8'
01550 29xxxx 3C Limited 4+6 F-Digit '2'
01550 30xxxx Inclarity plc 4+6 F-Digit '2'
01550 31xxxx Virgin Media Limited 4+6 F-Digit '4,5'
01550 32xxxx T.T.N.C. Limited 4+6 F-Digit '0,1,2,3,4,5,6,7,8,9'
01550 33xxxx Known Future Limited 4+6 F-Digit '3'
01550 34xxxx Orange Home UK Plc 4+6 F-Digit '0'
01550 35xxxx Net Solutions Europe Limited 4+6 F-Digit '5'
01550 36xxxx Skycom Ltd 4+6 F-Digit '2'
01550 37xxxx Spitfire Network Services Ltd 4+6 F-Digit '7'
01550 38xxxx TelNG Limited 4+6 F-Digit '2'
01550 39xxxx Localphone Limited 4+6 F-Digit '0'
01550 40xxxx Coralbridge Ltd 4+6 F-Digit '0'
01550 41xxxx VoIP-Un Limited 4+6 F-Digit '0'
01550 42xxxx Telephony Services Limited 4+6 F-Digit '2'
01550 43xxxx Solutios Limited 4+6 F-Digit '2'
01550 44xxxx Net-Work Internet Ltd 4+6 F-Digit '4'
01550 45xxxx Mars Communications Limited 4+6 F-Digit '0'
01550 46xxxx IPV6 Limited 4+6 F-Digit '0'
01550 47xxxx Instant Telecommunications Ltd 4+6 F-Digit '0'
01550 48xxxx Switch Services Ltd 4+6 F-Digit '0'
01550 49xxxx Nexus Telecommunications plc 4+6 F-Digit '0'
01550 50xxxx Mundio Mobile Limited 4+6 F-Digit '6'
01550 51xxxx CFL Communications Limited 4+6 F-Digit '0'
01550 52xxxx Known Communications Limited 4+6 F-Digit '0'
01550 54xxxx Danemere Street Creative 4+6 F-Digit '2'
01550 70xxxx LogicStar Limited 4+6
01550 71xxxx Magrathea Telecommunications Limited 4+6
01550 720xxx SWLKD BT, Llandovery (Dyfed) 4+6
01550 723xxx SWLKY BT, Llangadog (Dyfed) 4+6
01550 72xxxx BT 4+6
01550 73xxxx Cable & Wireless UK 4+6
01550 74xxxx BT 4+6
01550 75xxxx BT 4+6
01550 76xxxx BT 4+6
01550 77xxxx BT 4+6
01550 77xxxx SWLKY BT, Llangadog (Dyfed) 4+6
01550 78xxxx BT 4+6
01550 78xxxx SWLKD BT, Llandovery (Dyfed) 4+6
01550 79xxxx Edge Telecom Ltd 4+6
01550 90xxxx Freshtel UK Limited 4+6 F-Digit '0'
01550 91xxxx Gamma Telecom Holdings Ltd 4+6
01550 92xxxx FleXtel Limited 4+6
01550 93xxxx Opal Telecom Limited 4+6 F-Digit '8'
01550 94xxxx C3 Europe Limited 4+6 F-Digit '0'
01550 95xxxx IV Response Limited 4+6
01550 96xxxx Syntec UK Ltd 4+6
01550 97xxxx InTechnology Plc 4+6
01550 98xxxx TELSTRA EUROPE LIMITED 4+6