| PNG Dataco Limited | Private company limited by shares | Live |
| ACL DATACOM LIMITED | Private company limited by shares | Dissolved |
| DATACOM LIMITED | Private company limited by shares | Live |
| TOP WAY DATACOM LIMITED | Private company limited by shares | Dissolved |
| AMERICAN DATACOM (ASIA) LIMITED | Private company limited by shares | Dissolved |
| AWACS DATA-COM LIMITED | Private company limited by shares | Dissolved |
| CHINA DATACOM LIMITED | Private company limited by shares | Live |
| CLIPSAL DATACOM HK LIMITED | Private company limited by shares | Dissolved |
| Kt datacom communication Limited | Private company limited by shares | Dissolved |
| ASIA DATACOM CORPORATION LIMITED | Private company limited by shares | Dissolved |
| DATACOM CYBER LIMITED | Private company limited by shares | Dissolved |
| DATACOM TECHNOLOGY DEVELOPMENT LIMITED | Private company limited by shares | Live |
| DYNAMIC DATACOM LIMITED | Private company limited by shares | Dissolved |
| Datacom Electronic Limited | Private company limited by shares | Dissolved |
| DATACOM ENTERPRISES LIMITED | Private company limited by shares | Live |
| AMERICAN DATACOM (HK) LIMITED | Private company limited by shares | Dissolved |
| DATACOM HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| DATACOM HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| SURENET DATACOM (HONG KONG) LIMITED | Private company limited by shares | Live |
| PACIFIC DATACOM (HONG KONG) LIMITED | Private company limited by shares | Live |
| HUAXIA DATACOM CO., LIMITED | Private company limited by shares | Live |
| ICON DATACOM LIMITED | Private company limited by shares | Live |
| DATACOM INFORMATION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| DATACOM INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| DATA.COM INTERNATIONAL HOLDINGS LIMITED | Private company limited by shares | Dissolved |
| DATACOM SYSTEM INTERNATIONAL LIMITED | Private company limited by shares | Live |
| DATACOM NETWORK LIMITED | Private company limited by shares | Live |
| Security and Network Datacom Limited | Private company limited by shares | Live |
| PCCW-HKT DATACOM SERVICES LIMITED | Private company limited by shares | Live Ceased dormancy on 03-May-1999 |
| SINOTONE DATACOM LIMITED | Private company limited by shares | Dissolved |
| DATACOM SOUTHEAST ASIA (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SWIFTEL DATACOM (HK) LIMITED | Private company limited by shares | Dissolved |
| DATACOM CABLE SYSTEM COMPANY LIMITED | Private company limited by shares | Live |
| DATACOM TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| TOPS DATACOM LIMITED | Private company limited by shares | Live |
| DATA-COM TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| VISION DATACOM LIMITED | Private company limited by shares | Dissolved |
| DATACOM WIRE & CABLE CO. LIMITED | Private company limited by shares | Dissolved |
| DATACOMM COMPANY LIMITED | Private company limited by shares | Dissolved |
| DATACOMM (H.K.) NETWORK TECH LIMITED | Private company limited by shares | Dissolved |
| DATACOMM DTP PRINTING LIMITED | Private company limited by shares | Dissolved |
| DATACOMM SOLUTIONS LIMITED | Private company limited by shares | Dissolved |
| VLNS DATACOMM PRIVATE LIMITED | Private company limited by shares | Live |
| DATACON ASIA LIMITED | Private company limited by shares | Dissolved |
| DATACON SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| DataConflux Co., Limited | | Live |
| DataContent Limited | Private company limited by shares | Live |
| DATACOPS LIMITED | Private company limited by shares | Dissolved |
| DATACORE LIMITED | Private company limited by shares | Dissolved |
| DATACORP LIMITED | Private company limited by shares | Live |
| DATACORP HK LIMITED | Private company limited by shares | Dissolved |
| HALCYON DATACORP HK LIMITED | Private company limited by shares | Live |