| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| 38 OSBOURNE ROAD LIMITED | 05044219 | 14/02/2023 | Silver |
| 54 UPPER TOLLINGTON PARK LIMITED | 04355687 | 05/10/2002 | Gold |
| 54 UPPER TOLLINGTON PARK LIMITED | 04355687 | 18/01/2002 | Gold |
| CENTURYLINK LIMITED | 09626356 | 03/12/2021 | Dissolved |
| GC IMPSAT HOLDINGS III LIMITED | 06056401 | 14/12/2012 | Dissolved |
| MORAY ROAD LIMITED | 02815908 | 18/11/2020 | Silver |
| QWEST COMMUNICATIONS INTERNATIONAL LTD. | 03469872 | 14/09/2021 | Dissolved |
| RGQ SERVICES LIMITED | 05493778 | 28/06/2005 | Not Trading |
| RGQ SERVICES LIMITED | 05493778 | 28/06/2005 | Not Trading |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CIRION TECHNOLOGIES HOLDING I LIMITED | 06056257 | 07/12/2012 | 01/08/2022 | Amber |
| CIRION TECHNOLOGIES HOLDING II LIMITED | 06056399 | 08/03/2013 | 01/08/2022 | Bronze |
| CIRION TECHNOLOGIES NEDERLAND B.V. | FC027705 | 22/09/2020 | 01/08/2022 | Bronze |
| CROFTBRIDE LIMITED | 02334450 | 26/09/2018 | 18/01/2022 | Gold |
| FIBERNET UK LIMITED | 02940263 | 06/03/2019 | 01/11/2023 | Not Trading |
| LEVEL 3 COMMUNICATIONS LIMITED | 03514850 | 03/04/2014 | 01/11/2023 | Dissolved |
| LUMEN TECHNOLOGIES APAC HOLDINGS LIMITED | 13517649 | 19/07/2021 | 02/11/2023 | Bronze |
| LUMEN TECHNOLOGIES EMEA HOLDINGS LIMITED | 03855219 | 13/03/2019 | 01/11/2023 | One Red Flag |
| LUMEN TECHNOLOGIES SOLUTIONS UK LIMITED | 14849638 | 08/06/2023 | 02/11/2023 | Bronze |