| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CPW PROPERTY MANAGEMENT LIMITED | 06662893 | 31/03/2010 | Dissolved |
| MVIVA LIMITED | 03903192 | 01/02/2011 | Dissolved |
| OLD OPAL TELECOM LIMITED | 03734422 | 09/12/2002 | Dissolved |
| OPAL TELECOMMUNICATIONS PLC | 03214579 | 09/12/2002 | Dissolved |
| TISCALI NETWORK DISTRIBUTION LIMITED | 04660774 | 03/07/2009 | Dissolved |
| TOUCAN RESIDENTIAL LIMITED | 04775696 | 03/07/2009 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CPW NETWORK SERVICES LIMITED | 05408812 | 20/09/2010 | 26/07/2013 | Silver |
| GIS TELECOMS LIMITED | 06585711 | 31/10/2011 | 26/07/2013 | Dissolved |
| ONETEL TELECOMMUNICATIONS LIMITED | 04226697 | 20/09/2010 | 26/07/2013 | Not Trading |
| OPAL BUSINESS SOLUTIONS LIMITED | 05990928 | 20/09/2010 | 26/07/2013 | Not Trading |
| OPAL CONNECT LIMITED | 05727462 | 20/09/2010 | 26/07/2013 | Dissolved |
| PIPEX COMMUNICATIONS SERVICES LIMITED | 03059016 | 04/11/2011 | 26/07/2013 | Not Trading |
| PIPEX INTERNET LIMITED | 05306519 | 03/07/2009 | 26/07/2013 | Not Trading |
| PIPEX UK LIMITED | 04063120 | 03/07/2009 | 26/07/2013 | Not Trading |
| TALKTALK BRANDS LIMITED | 05840856 | 31/10/2011 | 26/07/2013 | Bronze |
| TALKTALK BUSINESS (2CCH) LIMITED | 06479825 | 20/09/2010 | 26/07/2013 | Not Trading |
| TALKTALK COMMUNICATIONS LIMITED | 03849133 | 31/03/2003 | 26/07/2013 | Amber |
| TALKTALK CORPORATE LIMITED | 06755322 | 03/07/2009 | 26/07/2013 | Silver |
| TALKTALK DIRECT LIMITED | 05303195 | 20/09/2010 | 26/07/2013 | Not Trading |
| TALKTALK GROUP LIMITED | 06534112 | 08/08/2008 | 26/07/2013 | Bronze |
| TALKTALK RB LIMITED | 05200716 | 20/09/2010 | 26/07/2013 | Dissolved |
| TALKTALK SERVICES LIMITED | 02303859 | 20/09/2010 | 26/07/2013 | Dissolved |
| TALKTALK TECHNOLOGY LIMITED | 03531818 | 20/09/2010 | 26/07/2013 | Dissolved |
| TALKTALK TELECOM GROUP LIMITED | 07105891 | 20/01/2010 | 31/05/2013 | Bronze |
| TALKTALK TELECOM HOLDINGS LIMITED | 03253714 | 25/05/2010 | 26/07/2013 | Silver |
| TALKTALK TELECOM LIMITED | 04633015 | 01/09/2003 | 26/07/2012 | Bronze |
| TALKTALK UK COMMUNICATION SERVICES LIMITED | 05714293 | 20/09/2010 | 26/07/2013 | Dissolved |
| TELCO GLOBAL LIMITED | 04222886 | 20/09/2010 | 26/07/2013 | Not Trading |
| TELCO HOLDINGS LIMITED | 04219971 | 20/09/2010 | 26/07/2013 | Gold |
| TISCALI UK LIMITED | 03408171 | 03/07/2009 | 26/07/2013 | Not Trading |
| UK TELCO (GB) LIMITED | 04341230 | 22/06/2012 | 26/07/2013 | Not Trading |
| V NETWORKS LIMITED | 05475260 | 20/09/2010 | 26/07/2013 | Not Trading |
| VIDEO NETWORKS LIMITED | 02740910 | 03/07/2009 | 26/07/2013 | Not Trading |
| VIRTUAL1 COMMUNICATIONS LIMITED | 05227052 | 24/01/2013 | 26/07/2013 | Bronze |