| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CHERNIKEEFF TELECOMMUNICATIONS LIMITED | 00719959 | 09/12/2004 | Dissolved |
| DIMENSION DATA COMMUNICATIONS (SERVICES) UK LIMITED | 01244813 | 30/01/2014 | Dissolved |
| G. K. Data (South) Ltd | 02963211 | 09/12/2004 | Dissolved |
| G.K. Data Services Ltd | 02645664 | 09/12/2004 | Dissolved |
| GK COMMUNICATIONS LIMITED | 02047108 | 09/12/2004 | Dissolved |
| SORRELFIELD LIMITED | 01461397 | 01/10/2009 | Dissolved |
| TRICOM BORER LIMITED | 00857432 | 09/12/2004 | Dissolved |
| TRICOM NETWORK SERVICES LIMITED | 00945296 | 09/12/2004 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| DIMENSION DATA ADVANCED INFRASTRUCTURE LIMITED | 01827185 | 09/12/2004 | 19/11/2014 | Dissolved |
| DIMENSION DATA COMMUNICATIONS UK LIMITED | 04036009 | 30/01/2014 | 10/10/2018 | Dissolved |
| G.K. COMMUNICATIONS GROUP LIMITED | 03025329 | 09/12/2004 | 15/02/2016 | Dissolved |
| MARGOLIS TECHNOLOGY LIMITED | 05535715 | 01/10/2010 | 22/02/2012 | Dissolved |
| NTT UNITED KINGDOM LIMITED | 01505004 | 27/01/2003 | 10/10/2018 | Amber |
| NTT UNITED KINGDOM VISUAL COMMUNICATIONS LTD | 03764734 | 19/04/2018 | 10/10/2018 | Dissolved |
| SPANDEX HOLDING UK LTD. | 07736318 | 21/06/2022 | 08/03/2024 | Bronze |
| VISCOMINVEST HOLDING UK LIMITED | 09954471 | 21/06/2022 | 08/03/2024 | One Red Flag |