| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Mercury Communications Pension Trustee Ltd | 01649725 | 31/12/1991 | Dissolved |
| Mercury Enhanced Services Ltd | 00947117 | 31/12/1991 | Dissolved |
| Numberhub Ltd | 05193942 | 02/08/2004 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Atack Fire (Robots) Ltd | 00312517 | 28/02/1991 | 23/06/1992 | Dissolved |
| CABLE & WIRELESS COMMUNICATIONS DATA NETWORK SERVICES LIMITED | 02070812 | 13/01/1993 | 01/02/1993 | Not Trading |
| CABLE & WIRELESS COMMUNICATIONS STARCLASS LIMITED | 01018703 | 31/12/1992 | 03/03/1994 | Dissolved |
| CABLE & WIRELESS COMMUNICATIONS STARCLASS LIMITED | 01018703 | 31/12/1992 | 06/07/1995 | Dissolved |
| CITY CABLE (HOLDINGS) LIMITED | 01042087 | 22/01/1993 | 03/03/1994 | Dissolved |
| CITY CABLE (HOLDINGS) LIMITED | 01042087 | 22/01/1993 | 06/07/1995 | Dissolved |
| COMXO HOLDINGS LIMITED | 03727666 | 25/05/2000 | 21/08/2001 | Amber |
| Cable & Wireless Communications Link 7500 Ltd | 01715022 | 31/12/1992 | 03/03/1994 | Dissolved |
| Cable & Wireless Communications Link 7500 Ltd | 01715022 | 13/01/1993 | 31/12/1993 | Dissolved |
| Cable & Wireless Communications Payphones Ltd | 02407108 | 21/07/1992 | 06/07/1995 | Dissolved |
| Dictograph Telephones Ltd | 00321281 | 23/06/1991 | 23/06/1992 | Dissolved |
| LONDON HYDRAULIC POWER COMPANY (THE) | ZC000055 | 31/12/1992 | 03/03/1994 | Gold |
| LONDON HYDRAULIC POWER COMPANY (THE) | ZC000055 | 31/12/1992 | 12/04/1995 | Gold |
| MERCURY COMMUNICATIONS (ECL) LIMITED | 01189708 | 08/02/1993 | 03/03/1994 | Dissolved |
| MERCURY COMMUNICATIONS (ECL) LIMITED | 01189708 | 31/12/1993 | 07/07/1995 | Dissolved |
| Prelink Ltd | 02654902 | 13/01/1993 | 01/02/1993 | Dissolved |
| S-TEL COMMUNICATIONS GROUP LIMITED | 03686860 | 23/07/1999 | 01/07/2000 | Amber |
| T-MOBILE NO.5 LIMITED | 02236984 | 14/08/1992 | 03/03/1994 | Insolvent |
| T-MOBILE NO.5 LIMITED | 02236984 | 01/02/1993 | 24/02/1995 | Insolvent |
| THE ZACCHAEUS 2000 TRUST | 05442501 | 02/07/2009 | 28/06/2017 | Gold |
| The Telecommunications Numbering and Addressing Board Limite | 02308061 | 01/06/1992 | 06/07/1995 | Dissolved |
| Tr Time Services Ltd | 01579327 | 23/06/1991 | 23/06/1993 | Dissolved |
| V BAND LIMITED | 01855636 | 31/12/1992 | 28/07/1994 | Not Trading |
| VODAFONE ENTERPRISE U.K. | 01541957 | 31/12/1992 | 29/03/1993 | Gold |
| WISHPLATE LIMITED | 01700078 | 30/07/1992 | 28/12/1992 | Dissolved |