| Alentus Corporation |
AS 4250 |
| Arrowhead Systems |
AS 12870 |
| Ask4 Limited |
AS 41230 |
| Associated Networks (UK) Ltd |
AS 20561 |
| Aexiomus Ltd |
AS 6770 |
| Avensys Networks |
AS 8553 |
| Awareness Software Ltd |
AS 34931 |
| Brightsolid formerly Scotland Online Ltd |
AS 5564 |
| Burstfire Networks Ltd |
AS 9153 |
| Bytemark Computer Consulting Ltd |
AS 35425 |
| C2 Internet |
AS 13005 |
| CCS Leeds |
AS 34555 |
| Claranet |
AS 8426 |
| CacheNetworks, LLC |
AS 30081 |
| Custodian DC Ltd |
AS 50300 |
| Domicilium |
AS 15766 |
| DX.net (Dexterity Networks) |
AS 12658 |
| Entanet International Ltd |
AS 8468 |
| Excell Business Systems Ltd |
AS 8530 |
| Exponential-e |
AS 25180 |
| Faelix Ltd |
AS 41495 |
| Fusion Media Networks |
AS 31270 |
| Gconnect |
AS 33941 |
| Getronics Ltd |
AS 48083 |
| Google |
AS 15169 |
| Griffin Internet |
AS 20500 |
| Hosted IP Communications (Europe) Limited |
AS 35180 |
| Hotlinks Internet Services |
AS 20976 |
| iDAQ Ltd |
AS 34660 |
| Internet Central Limited |
AS 6717 |
| Internet Engineering Ltd |
AS 33968 |
| JANET (UK) |
AS 786 |
| Keycom plc |
AS 25178 |
| KCP Web Services Ltd |
AS 6859 |
| KCOM Group plc |
AS 12390 |
| Lancaster University Network Services LTD |
AS 30847 |
| Last.FM |
AS 44948 |
| LateRooms Ltd |
AS 31523 |
| Low Cost Host Ltd |
AS 25098 |
| Linix Ltd |
AS 25582 |
| Lyndos |
AS 48610 |
| M247 (Open Hosting Ltd) |
AS 33970 |
| Manchester Metronet Ltd |
AS 42973 |
| Melbourne Network Solutions Ltd |
AS 39451 |
| MessageLabs Ltd |
AS 21345 |
| Merula Limited |
AS 16353 |
| Microsoft Corp |
AS 8068 |
| Moneysupermarket Group |
AS 41963 |
| Mythic Beasts |
AS 44684 |
| Netrino UK Ltd |
AS 31715 |
| NetNorth |
AS 25376 |
| Net Services |
AS 15444 |
| Netserve Consultants Ltd |
AS 21448 |
| Northern Data Solutions Ltd |
AS 39448 |
| ntl Group |
AS 5089 |
| OneConnect Ltd |
AS 59581 |
| Opal Telecom |
AS 13285 |
| Optinium Internet |
AS 39925 |
| Outsourcery |
AS 43198 |
| PowerGroup (Power Internet Ltd) |
AS 8689 |
| Phoenix IT Group PLC |
AS 8613 |
| REDNET - Opal solutions |
AS 8586 |
| Redstation Ltd |
AS 35662 |
| Redstone Communications Ltd |
AS 5552 |
| Siemens Business Services Ltd (BBC) |
AS 2818 |
| Simwood eSMS Limited |
AS 42353 |
| Small World Cable Ltd |
AS 50534 |
| Synetrix Limited |
AS 29212 |
| Talk Internet Ltd |
AS 44611 |
| NTL/Telewest Communications Plc |
AS 5462 |
| The Positive Internet |
AS 21260 |
| The UK Grid Network Ltd |
AS 39757 |
| Thus |
AS 8546 |
| Timewarp |
AS 15558 |
| Teledata |
AS 43545 |
| Telappliant Ltd |
AS 34066 |
| Tradermedia |
AS 28695 |
| Tuxtel Ltd |
AS 25501 |
| Virgin Radio Ltd |
AS 34763 |
| Vispa Internet Limited |
AS 29129 |
| Webdiscount |
AS 24637 |
| Websense |
AS 44444 |
| Web Tapestry |
AS 21055 |
| Wildcard Networks |
AS 34119 |
| Zen Internet |
AS 13037 |
