| RED TELCO LIMITED | Private company limited by shares | Live |
| TELCO LIMITED | Private company limited by shares | Dissolved |
| AW Telco Limited | Private company limited by shares | Live |
| Telco Limited | Private company limited by shares | Live |
| SNG Telco Limited | | Live |
| ALCHEMY TELCO SOLUTIONS ASIA LIMITED | Private company limited by shares | Live |
| TELCO ALLIED SOLUTIONS COMPANY LIMITED | Private company limited by shares | Live |
| ASIA TELCO EXCHANGE LIMITED | Private company limited by shares | Dissolved |
| TELCO SYSTEMS ASIA/PACIFIC LIMITED | Private company limited by shares | Live Commenced dormancy on 31-Oct-2001 |
| Telco Infinity Communication Limited | Private company limited by shares | Live |
| TELCO INFINITY COMMUNICATION LIMITED | Private company limited by shares | Live |
| SCHLUMBERGER TELCO BUSINESS CONTINUITY SERVICES LIMITED | Private company limited by shares | Dissolved |
| TELCO DEVICE LIMITED | Private company limited by shares | Live |
| Telco Economics Limited | Private company limited by shares | Live |
| EGLOBAL NET TELCO LIMITED | Private company limited by shares | Live |
| TELCO EUROPE LIMITED | Private company limited by shares | Dissolved |
| Global Telco Technology Limited | Private company limited by shares | Live |
| TELCO (H.K.) LIMITED | Private company limited by shares | Dissolved |
| WAI PING (HK) TELCO TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Hong Kong Telco Network Limited | Private company limited by shares | Dissolved |
| HONGKONG PINGMAR TELCO LIMITED | Private company limited by shares | Live |
| Telco Impex Co Limited | Private company limited by shares | Live |
| TELCO INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| TELCO INTERNATIONAL (ASIA) LIMITED | Private company limited by shares | Live |
| Telco Network Asia Limited | Private company limited by shares | Live |
| TELCO PROPERTIES LIMITED | Private company limited by shares | Dissolved |
| Telco Properties Limited | Private company limited by shares | Live |
| HUI PING (HONG KONG) TELCO TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Telco Ventures Asia Limited | Private company limited by shares | Live |
| Telco Wholesale Services Limited | | Live |
| WORLD TELCO SERVICES LIMITED | Private company limited by shares | Live |
| TELCOCITY LIMITED | Private company limited by shares | Dissolved |
| TELCOGAMES ASIA, LIMITED | Private company limited by shares | Dissolved |
| Telcoin Limited | Private company limited by shares | Live |
| TELCOLAB LIMITED | Private company limited by shares | Live |
| Telcologics Asia Limited | | Live |
| SB TELCOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| I & M TELCOM. COMPANY LIMITED | Private company limited by shares | Live |
| TELCOM LIMITED | Private company limited by shares | Live |
| TMT Telcom Limited | Private company limited by shares | Live |
| TELCOM LIMITED | Private company limited by shares | Live |
| X Telcom Limited | | Live |
| Chin Telcom Limited | Private company limited by shares | Dissolved |
| Telcom Consult Limited | Private company limited by shares | Dissolved |
| Interconnect Telcom Co., Limited | Private company limited by shares | Live |
| DRTEL INTERNATIONAL (HONGKONG) TELCOM CO., LIMITED | Private company limited by shares | Live |
| MING FAI TELCOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| Ultimate Telcom Limited | Private company limited by shares | Live |
| TELCOMLAB LIMITED | Private company limited by shares | Live |
| TELCOMM LIMITED | Private company limited by shares | Live |
| TaiFeng Telcommunication (HK) Limited | Private company limited by shares | Live |
| ZhongTong Telcommunications (HK) Limited | Private company limited by shares | Live |
| Telcomnia Limited | Private company limited by shares | Live |
| TELCOMSYSTEMS HK LIMITED | Private company limited by shares | Live |
| TELCON LIMITED | Private company limited by shares | Dissolved |
| TELCONE STAR CO. LIMITED | Private company limited by shares | Dissolved |
| UFI Telco-Net Limited | Private company limited by shares | Live |
| TELCONET COMPANY LIMITED | Private company limited by shares | Live |
| Telcordia Technologies Hong Kong, Limited | Private company limited by shares | Dissolved |
| Telcordia Trade Limited | Private company limited by shares | Live |
| Telcoson Limited | Private company limited by shares | Live |
| TELCOVIZ LIMITED | Private company limited by shares | Dissolved |
| TELCOX CO. LIMITED | Private company limited by shares | Live |