| 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 |