| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| AIRRADIO LIMITED | 06792964 | 09/12/2015 | Amber |
| Advanced Mobile Communications International,Inc. | FC015891 | 20/02/1991 | Dissolved |
| D. & P. Imports Ltd | 03041293 | 05/04/1995 | Dissolved |
| Klook Ltd | 05864118 | 03/07/2006 | Dissolved |
| SIMOCO EMEA LTD | 04382515 | 15/09/2020 | Amber |
| SIMOCO WIRELESS SOLUTIONS LIMITED | 07038450 | 16/04/2010 | Amber |
| South Pacific Ltd | 04395780 | 10/10/2002 | Dissolved |
| THORCOM SYSTEMS LIMITED | 02704696 | 16/12/2021 | Amber |
| TTG GLOBAL SOLUTIONS LIMITED | 12700410 | 09/09/2020 | Gold |
| TTG LIMITED | 12700422 | 15/09/2020 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AFFINI TECHNOLOGY LIMITED | 04574231 | 15/09/2020 | 13/06/2024 | Silver |
| AIRRADIO LIMITED | 06792964 | 16/04/2010 | 09/12/2015 | Amber |
| C & C TECHNOLOGY LIMITED | 02411308 | 09/12/2015 | 31/03/2016 | Dissolved |
| CITY OF LONDON TELECOMMUNICATIONS LIMITED | 01939847 | 20/08/1992 | 01/01/1995 | Not Trading |
| COLT TECHNOLOGY SERVICES | 02452736 | 19/12/1991 | 01/01/1995 | Amber |
| HUTCHISON COMMUNICATION SYSTEMS LIMITED | 03462357 | 09/09/2005 | 03/11/2008 | Not Trading |
| INDIGO TELECOM GROUP LIMITED | 03675459 | 06/01/2003 | 03/11/2008 | One Red Flag |
| INDIGO TELECOM INSTALLATION SERVICES LIMITED | 04200834 | 29/11/2007 | 03/11/2008 | Not Trading |
| INFOMATRIX MOBILE DATA LTD | 05759328 | 28/03/2006 | 03/11/2008 | Dissolved |
| Intertel Communications Ltd | 02931839 | 23/05/1994 | 01/01/1995 | Dissolved |
| N W P Communications Ltd | 03349829 | 18/09/1997 | 31/05/2001 | Dissolved |
| NEW WORLD PAYPHONES HOLDINGS (GERMANY) LIMITED | 03525594 | 17/08/1998 | 31/05/2001 | Dissolved |
| SIMOCO EMEA LTD | 04382515 | 03/06/2002 | 03/11/2008 | Amber |
| TEAM SIMOCO LTD | 00258791 | 06/01/2003 | 03/11/2008 | Dissolved |
| TEAM TELECOMMUNICATIONS GROUP LIMITED | 05131474 | 16/07/2004 | 03/11/2008 | Gold |
| TEAM TELECOMMUNICATIONS LIMITED | 05694491 | 01/02/2006 | 03/11/2008 | Dissolved |
| TTG GLOBAL GROUP LIMITED | 03944614 | 10/01/2005 | 03/11/2008 | Dissolved |
| TTG GLOBAL LIMITED | 07472975 | 09/12/2015 | 31/03/2016 | Dissolved |
| Telefficiency Ltd | 03163550 | 17/04/1996 | 25/09/1997 | Dissolved |
| The London Pager Co Ltd | 02557536 | 12/11/1992 | 01/01/1995 | Dissolved |