| Starfone Communications Limited | Private company limited by shares | Live |
| STARGOGO COMMUNICATIONS (ASIA) LIMITED | Private company limited by shares | Live |
| STARWAY COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| STATE OF QILU CULTURAL COMMUNICATIONS LIMITED -THE- | Private company limited by shares | Live |
| STEP AHEAD COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| Open Step Communications Limited | Private company limited by shares | Live |
| STONE COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| STONE COMMUNICATIONS (HONGKONG) TECH. CO., LIMITED | Private company limited by shares | Live |
| STRATEGIC COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| GC Strategic Communications Limited | Private company limited by shares | Live |
| GCM Strategic Communications Limited | Private company limited by shares | Live |
| Streamlined Communications Limited | Private company limited by shares | Live |
| STREET WISE COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| STREETER COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| STRONG IDEA COMMUNICATIONS CO., LIMITED | Private company limited by shares | Dissolved |
| Slash Studio & Communications Limited | Private company limited by shares | Live |
| WKW Strategic Communications Studio Limited | Private company limited by shares | Live |
| Subsea Communications Limited | Private company limited by shares | Live |
| SUNGSHIN COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| SUNLIGHT COMMUNICATIONS (HK) LIMITED | Private company limited by shares | Dissolved |
| SUNLINK COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| SUNSHINE COMMUNICATIONS HK LIMITED | Private company limited by shares | Dissolved |
| SUNSHINE PR & COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| SUNWAVE COMMUNICATIONS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| SUPER COMMUNICATIONS GROUP (H.K.) COMPANY LIMITED | Private company limited by shares | Dissolved |
| SUPER-BOX COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| COMMUNICATIONS SUPERHIGHWAY (H.K.) LIMITED | Private company limited by shares | Live |
| SUPER-JET COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| SUPERLINK COMMUNICATIONS COMPANY LIMITED | Private company limited by shares | Dissolved |
| SUPREME COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| SURPLUS COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| Tactical Communications and Surveillance Systems Limited | Private company limited by shares | Live |
| SWAGGER COMMUNICATIONS LIMITED | | Live |
| Swann Communications Limited | Private company limited by shares | Live |
| SWITCH COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| ADVANCED SWITCHING COMMUNICATIONS (ASIA) LIMITED | Private company limited by shares | Dissolved |
| SYME COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| SYMPHONIC COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| SYMPHONY COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| SYNC COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| SYNCHRONIC COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| SYNECTICS COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| SYNERG COMMUNICATIONS, LIMITED | Private company limited by shares | Dissolved |
| SYSTEM COMMUNICATIONS (H.K.) LIMITED | Private company limited by shares | Live |
| SEACORP COMMUNICATIONS SYSTEMS (HK) LIMITED | Private company limited by shares | Dissolved |
| SZCHAOHAO COMMUNICATIONS INT'L LIMITED | Private company limited by shares | Dissolved |
| TACTIC COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TALENT COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| UNITED TALENTS COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| EASY TALK COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| Talors Communications Limited | Private company limited by shares | Live |
| TAMA COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TAMBERCE COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TANGRAM COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| INK TANK COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| THINK TANK COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TANTUM COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TANYA COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TEAM UP COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TEAM TOP COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| ONE TEAM COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TEAMWELL COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TEAMWORK COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TECHBRIDGE COMMUNICATIONS LIMITED | Private company limited by shares | Live Commenced dormancy on 29-Jun-2007 |
| TECHIFORD COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TECHNO COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TECHNO FACTOR (SYSTEM COMMUNICATIONS) LIMITED | Private company limited by shares | Dissolved |
| HK Qitong Network Communications Technolog Limited | Private company limited by shares | Live |
| CHINA PACIFIC OCEAN COMMUNICATIONS TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Horsen Communications Technologies Co., Limited | Private company limited by shares | Live Commenced dormancy on 16-Aug-2018 |
| LongTime Communications Technologies Limited | Private company limited by shares | Live |
| SPECTRUM & MASTER COMMUNICATIONS TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| GENERAL COMMUNICATIONS & TRANSPORTATION TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| VICTORY COMMUNICATIONS & TECHNOLOGIES CORPORATION LIMITED | Private company limited by shares | Dissolved |
| TMT COMMUNICATIONS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| WAT Communications Technology Company Limited | Private company limited by shares | Live |
| JX Technology and Communications Limited | Private company limited by shares | Live |
| A-ONE COMMUNICATIONS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| AQUANTA COMMUNICATIONS TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| KEY COMMUNICATIONS TECHNOLOGY (ASIA) LIMITED | Private company limited by shares | Dissolved |
| BeeConnect Communications Technology Limited | Private company limited by shares | Dissolved |
| CHARM COMMUNICATIONS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| CHINA COMMUNICATIONS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| CHINA COMMUNICATIONS DIGITAL TECHNOLOGY CO., LIMITED | | Live |
| CHINA BEI DOU COMMUNICATIONS TECHNOLOGY GROUP LIMITED | Private company limited by shares | Live |
| CHINA ENTERPRISE COMMUNICATIONS TECHNOLOGY (HOLDING) LIMITED | Private company limited by shares | Live |
| China Communications Technology (HongKong) Limited | Private company limited by shares | Live |
| MPA COMMUNICATIONS TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| HK V2 COMMUNICATIONS TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| Shenzhen Hua Hao Communications Technology Co., Limited | Private company limited by shares | Live |
| T & P COMMUNICATIONS TECHNOLOGY CORPORATION LIMITED | Private company limited by shares | Dissolved |
| Easy Communications International Technology Limited | Private company limited by shares | Live |
| FORME COMMUNICATIONS TECHNOLOGY LIMITED | Private company limited by shares | Live |
| DIGITAL FRIENDLY COMMUNICATIONS TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| GUANGZHOU BUBUKAO COMMUNICATIONS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| COMMUNICATIONS TECHNOLOGY ( H.K. ) LIMITED | Private company limited by shares | Dissolved |
| GS COMMUNICATIONS TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| 588 Communications Technology (HK) Limited | | Live |
| HK HUACHUANG COMMUNICATIONS TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HUAQI COMMUNICATIONS TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |