United Kingdom

Number Code Allocated To Number Length Notes
01866 20xxxx InTechnology Plc 4+6 F-Digit '2'
01866 21xxxx Telecom2 Ltd 4+6 F-Digit '6'
01866 22xxxx Net-Work Internet Ltd 4+6 F-Digit '2'
01866 23xxxx Timico Limited 4+6 F-Digit '8'
01866 24xxxx Telswitch Limited 4+6 F-Digit '0'
01866 25xxxx Voxbone SA 4+6 F-Digit '8'
01866 26xxxx Starcomm Ltd 4+6 F-Digit '0'
01866 27xxxx Known Future Limited 4+6 F-Digit '6'
01866 28xxxx Solutios Limited 4+6 F-Digit '2'
01866 29xxxx IPV6 Limited 4+6 F-Digit '0'
01866 30xxxx Mars Communications Limited 4+6 F-Digit '0'
01866 31xxxx Instant Telecommunications Ltd 4+6 F-Digit '0'
01866 32xxxx 3C Limited 4+6 F-Digit '2'
01866 33xxxx Mundio Mobile Limited 4+6 F-Digit '6'
01866 34xxxx CFL Communications Limited 4+6 F-Digit '0'
01866 35xxxx Known Communications Limited 4+6 F-Digit '0'
01866 36xxxx Nexus Telecommunications plc 4+6 F-Digit '0'
01866 60xxxx FleXtel Limited 4+6
01866 61xxxx LogicStar Limited 4+6
01866 62xxxx Virgin Media Limited 4+6 F-Digit '4,5'
01866 63xxxx Syntec UK Ltd 4+6
01866 64xxxx Orange Home UK Plc 4+6 F-Digit '0'
01866 65xxxx T.T.N.C. Limited 4+6 F-Digit '0,1,2,3,4,5,6,7,8,9'
01866 66xxxx C3 Europe Limited 4+6 F-Digit '6'
01866 67xxxx Spitfire Network Services Ltd 4+6 F-Digit '7'
01866 68xxxx Edge Telecom Ltd 4+6
01866 69xxxx TelNG Limited 4+6 F-Digit '2'
01866 80xxxx Skycom Ltd 4+6 F-Digit '2'
01866 81xxxx Frontier Systems Ltd 4+6 F-Digit '3'
01866 82xxxx BT 4+6
01866 82xxxx WSTAT BT, Taynuilt (Strathclyde) 4+6
01866 83xxxx BT 4+6
01866 83xxxx WSKIC BT, Kilchrenan (Argyll & Bute) 4+6
01866 84xxxx BT 4+6
01866 84xxxx WSLOH BT, Lochavich (Argyll & Bute) 4+6
01866 85xxxx Coralbridge Ltd 4+6 F-Digit '0'
01866 86xxxx Net Solutions Europe Limited 4+6 F-Digit '6'
01866 87xxxx Opal Telecom Limited 4+6 F-Digit '8'
01866 88xxxx Inclarity plc 4+6 F-Digit '2'
01866 89xxxx VoIP-Un Limited 4+6 F-Digit '0'
01866 90xxxx Teledesign plc 4+6 F-Digit '2'
01866 91xxxx IV Response Limited 4+6
01866 92xxxx Telephony Services Limited 4+6 F-Digit '2'
01866 93xxxx Entanet International Ltd 4+6 F-Digit '1'
01866 94xxxx Danemere Street Creative 4+6
01866 95xxxx O-Bit Telecom Limited 4+6 F-Digit '7'
01866 96xxxx Gamma Telecom Holdings Ltd 4+6
01866 97xxxx Nationwide Telephone Assistance Ltd 4+6 F-Digit '0'
01866 98xxxx Magrathea Telecommunications Limited 4+6