| GB | AS42880 | EntServ UK Limited |
| US | AS14931 | The St. Paul Travelers Companies, Inc. |
| GB | AS51953 | Sagentia Ltd |
| GB | AS20695 | Capital One (Europe) Plc |
| GB | AS21433 | Accenture |
| CA | AS397681 | CGI Inc. |
| GB | AS197107 | SERVICE EXPRESS EUROPE LIMITED |
| GB | AS205693 | Driver & Vehicle Licensing Agency |
| GB | AS34344 | Port Of Tilbury London Ltd |
| US | AS16525 | KBR |
| GB | AS34099 | Road Tech Computer Systems Ltd. |
| GB | AS198142 | Warrington Borough Council |
| GB | AS28939 | ARM |
| GB | AS35707 | Scottish Power UK PLC |
| IT | AS202679 | Deltatre Limited |
| US | AS16491 | ViaSat, Inc. |
| GB | AS56929 | WANDSWORTH-BOROUGH-COUNCIL |
| GB | AS206576 | Wavenet Limited - AS206576 |
| FR | AS50497 | SymphonyEYC France SAS |
| GB | AS208895 | Intelligence Hosting Services Limited |
| GB | AS44008 | Royal Borough of Kensington and Chelsea |
| GB | AS21470 | South West Communications Group |
| GB | AS62364 | Plymouth City Council |
| GB | AS44403 | Bristol City Council |
| GB | AS44521 | Jagex Limited |
| GB | AS49324 | Nottingham City Council |
| GB | AS197370 | Nottinghamshire County Council |
| GB | AS199675 | Willis Group Services Ltd |
| GB | AS41383 | Wolseley UK Limited |
| US | AS22001 | Life Technologies Corp. |
| GB | AS15770 | Durham County Council |
| GB | AS213885 | Wilxite Ltd |
| GB | AS210988 | London Borough Of Hammersmith & Fulham |
| EU | AS1290 | Telstra International (PSINet UK) |
| GB | AS39400 | London Borough of Hackney |
| US | AS397010 | Dice Lion Technology |
| US | AS19305 | Transaction Network Services, Inc. |
| GB | AS205900 | APC Solutions UK Ltd |
| GB | AS39461 | EDF Energy Nuclear Generation Group Ltd |
| GB | AS8296 | HBVB Private Unlimited |
| GB | AS60914 | Telecoms Consortium Ltd. |
| US | AS18930 | Dow Corning |
| US | AS63112 | Service-now.com |
| GB | AS47534 | VOCALINK LTD |
| GB | AS205654 | Labtech Systems Ltd |
| GB | AS60382 | Cranleigh School |
| GB | AS50203 | Reynolds and Reynolds Limited |
| GB | AS47871 | Newsquest Media Group Ltd |
| GB | AS8669 | Total Web Solutions Ltd |
| FR | AS211124 | CGI-UK-AS |
