United Kingdom

Number Code Allocated To Number Length Notes
01821 20xxxx O-Bit Telecom Limited 4+6 F-Digit '7'
01821 21xxxx InTechnology Plc 4+6 F-Digit '2'
01821 22xxxx Net-Work Internet Ltd 4+6 F-Digit '2'
01821 23xxxx Telecom2 Ltd 4+6 F-Digit '6'
01821 24xxxx Timico Limited 4+6 F-Digit '8'
01821 25xxxx Voxbone SA 4+6 F-Digit '8'
01821 26xxxx Starcomm Ltd 4+6 F-Digit '0'
01821 27xxxx Known Future Limited 4+6 F-Digit '5'
01821 28xxxx Solutios Limited 4+6 F-Digit '2'
01821 29xxxx Instant Telecommunications Ltd 4+6 F-Digit '0'
01821 30xxxx Orange Home UK Plc 4+6 F-Digit '0'
01821 31xxxx Thus Plc 4+6
01821 32xxxx Virgin Media Limited 4+6 F-Digit '4,5'
01821 33xxxx T.T.N.C. Limited 4+6 F-Digit '0,1,2,3,4,5,6,7,8,9'
01821 34xxxx Danemere Street Creative 4+6
01821 35xxxx Inclarity plc 4+6 F-Digit '2'
01821 36xxxx TelNG Limited 4+6 F-Digit '2'
01821 37xxxx Spitfire Network Services Ltd 4+6 F-Digit '7'
01821 38xxxx Localphone Limited 4+6 F-Digit '0'
01821 39xxxx Frontier Systems Ltd 4+6 F-Digit '3'
01821 40xxxx Skycom Ltd 4+6 F-Digit '2'
01821 41xxxx Net Solutions Europe Limited 4+6 F-Digit '1'
01821 42xxxx Opal Telecom Limited 4+6 F-Digit '8'
01821 43xxxx VoIP-Un Limited 4+6 F-Digit '0'
01821 44xxxx Freshtel UK Limited 4+6 F-Digit '7'
01821 45xxxx C3 Europe Limited 4+6 F-Digit '1'
01821 46xxxx Coralbridge Ltd 4+6 F-Digit '0'
01821 47xxxx Telephony Services Limited 4+6 F-Digit '2'
01821 48xxxx Teledesign plc 4+6 F-Digit '2'
01821 49xxxx Nationwide Telephone Assistance Ltd 4+6 F-Digit '0'
01821 50xxxx Mars Communications Limited 4+6 F-Digit '0'
01821 51xxxx IPV6 Limited 4+6 F-Digit '0'
01821 52xxxx 3C Limited 4+6 F-Digit '2'
01821 53xxxx Telecoms World Plc 4+6 F-Digit '0'
01821 54xxxx CFL Communications Limited 4+6 F-Digit '0'
01821 55xxxx Known Communications Limited 4+6 F-Digit '0'
01821 56xxxx Nexus Telecommunications plc 4+6 F-Digit '0'
01821 57xxxx Mundio Mobile Limited 4+6 F-Digit '6'
01821 60xxxx LogicStar Limited 4+6
01821 61xxxx Edge Telecom Ltd 4+6
01821 62xxxx Affiniti Integrated Solutions Ltd 4+6
01821 63xxxx FleXtel Limited 4+6
01821 640xxx ESBLB BT, Balbeggie (Tayside) 4+6
01821 641xxx ESERR BT, Errol (Tayside) 4+6
01821 642xxx ESERR BT, Errol (Tayside) 4+6
01821 64xxxx BT 4+6
01821 65xxxx BT 4+6
01821 65xxxx ESKNR BT, Kinrossie (Tayside) 4+6
01821 66xxxx Magrathea Telecommunications Limited 4+6
01821 67xxxx BT 4+6
01821 67xxxx ESRAI BT, Rait (Perth & Kinross) 4+6
01821 68xxxx Gamma Telecom Holdings Ltd 4+6
01821 69xxxx Syntec UK Ltd 4+6