| SPECTRUM COMMUNICATION SYSTEM (HK) LIMITED | Private company limited by shares | Dissolved |
| SPEED WAY COMMUNICATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| SPEED COMMUNICATION CO., LIMITED | Private company limited by shares | Live |
| SPEED COMMUNICATION NETWORK (HK) LIMITED | Private company limited by shares | Live |
| SPEEDNET COMMUNICATION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| SPEEDVOIP COMMUNICATION TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| SPEEDY COMMUNICATION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| SPEEDY COMMUNICATION SURVEYORS LIMITED | Private company limited by shares | Dissolved |
| FREE SPIRIT COMMUNICATION COMPANY LIMITED | Private company limited by shares | Live |
| Communication Square Limited | Private company limited by shares | Live |
| Communication Standards Limited | Private company limited by shares | Live |
| COMMUNICATION STAR COMPANY LIMITED | Private company limited by shares | Dissolved |
| STAR COMMUNICATION LIMITED | Private company limited by shares | Live |
| TOP STAR COMMUNICATION LIMITED | Private company limited by shares | Live |
| GQ Star Communication Limited | | Live |
| HK Star Entertainment Communication Limited | Private company limited by shares | Dissolved |
| TOP STAR NETWORK & COMMUNICATION (HK) COMPANY LIMITED | Private company limited by shares | Dissolved |
| StarGate Communication Limited | Private company limited by shares | Live |
| STARLIGHT COMMUNICATION (H.K.) LIMITED | Private company limited by shares | Live |
| NEW STARTING COMMUNICATION CO., LIMITED | Private company limited by shares | Live |
| Starwave Communication Technology Limited | | Live |
| Eastern Step Communication Limited | Private company limited by shares | Dissolved |
| Stonesoup Communication Limited | Private company limited by shares | Live |
| Straightway Communication Limited | Private company limited by shares | Live |
| Straits Communication HK LIMITED | Private company limited by shares | Live |
| DONE & EXCHANGE STRATEGIC COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| Voices Communication & Strategy Limited | Private company limited by shares | Live |
| STRONG POWER COMMUNICATION (HONGKONG) CO., LIMITED | Private company limited by shares | Live |
| STYLE COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| SUMMIT COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| Sunfone Communication Holding Limited | Private company limited by shares | Live |
| SUNGLORY COMMUNICATION HK LIMITED | Private company limited by shares | Dissolved |
| SUNNY COMMUNICATION LIMITED | Private company limited by shares | Live |
| SUNNY OCEAN COMMUNICATION (H.K.) COMPANY LIMITED | Private company limited by shares | Dissolved |
| SUNPARK COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| SUNRISE COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| SUNSHINE COMMUNICATION (HK) LIMITED | Private company limited by shares | Live |
| Sun-Shine Communication Technology Co., Limited | Private company limited by shares | Live |
| SUNWI COMMUNICATION LIMITED | Private company limited by shares | Live |
| SUPERTEC COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| Century Communication Supply Chain Management Limited | Private company limited by shares | Dissolved |
| SURECALL COMMUNICATION (HK) LIMITED | Private company limited by shares | Live |
| SURELINK COMMUNICATION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| HK SUREWIN COMMUNICATION SPAREPARTS CO., LIMITED | Private company limited by shares | Dissolved |
| B. SWAN COMMUNICATION LIMITED | Private company limited by shares | Live |
| SWELATEL COMMUNICATION LIMITED | Private company limited by shares | Live |
| SWINDEV COMMUNICATION CO., LIMITED | Private company limited by shares | Dissolved |
| MEGA SYNC COMMUNICATION LIMITED | Private company limited by shares | Live |
| Synctone Communication Limited | Private company limited by shares | Dissolved |
| Synertone Satellite Communication Limited | Private company limited by shares | Live |
| Synertone Communication Technology Limited | Private company limited by shares | Live |
| LTT COMMUNICATION SYSTEM LIMITED | Private company limited by shares | Dissolved |
| C & T COMMUNICATION SYSTEM LIMITED | Private company limited by shares | Dissolved |
| MO BEI COMMUNICATION SYSTEM (HK) LIMITED | Private company limited by shares | Dissolved |
| TTS COMMUNICATION SYSTEM EQUIPMENT (H.K.) COMPANY LIMITED | Private company limited by shares | Dissolved |
| Prodigy Communication System Limited | Private company limited by shares | Live |
| COMMUNICATION SYSTEMS LIMITED | Private company limited by shares | Dissolved |
| ADVANCED COMMUNICATION & AUTOMATION SYSTEMS LIMITED | Private company limited by shares | Live |
| PDI COMMUNICATION SYSTEMS (HK) LIMITED | Private company limited by shares | Live |
| Lexifone Communication Systems Limited | Private company limited by shares | Live |
| TACSYSTEM COMMUNICATION LIMITED | Private company limited by shares | Live |
| TACTICS COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| China Taekwon-Do Culture Communication Co., Limited | Private company limited by shares | Live |
| TAESANG COMMUNICATION LIMITED | Private company limited by shares | Live |
| TAIAN GLOBAL COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| TAICOM COMMUNICATION LIMITED | Private company limited by shares | Live |
| DAWEI COMMUNICATION TAIWAN COMPANY LIMITED | Private company limited by shares | Dissolved |
| TANGWEN COMMUNICATION & MEDIA LIMITED | Private company limited by shares | Live |
| Mega Target Communication Limited | Private company limited by shares | Live |
| T.C.L. COMMUNICATION (HK) LIMITED | Private company limited by shares | Live |
| T.C.L. COMMUNICATION (INT'L) LIMITED | Private company limited by shares | Live |
| TEAMAX COMMUNICATION HK COMPANY LIMITED | Private company limited by shares | Dissolved |
| HUA JUN COMMUNICATION TECH. CO. LIMITED | Private company limited by shares | Dissolved |
| I TECH COMMUNICATION HK LIMITED | Private company limited by shares | Live |
| BROADWIN TECH COMMUNICATION LIMITED | Private company limited by shares | Live |
| CHUNG SUN TECH COMMUNICATION GROUP LIMITED | Private company limited by shares | Live |
| NEW COMMUNICATION TECH CO., LIMITED | Private company limited by shares | Live |
| Fast Communication Tech Limited | Private company limited by shares | Live |
| KYS COMMUNICATION TECH. (HK) GROUP LIMITED | Private company limited by shares | Live |
| SUNRISE COMMUNICATION TECH INT'L LIMITED | | Live |
| UJOY COMMUNICATION TECH CO., LIMITED | Private company limited by shares | Live |
| WEICHUANGLI COMMUNICATION (HK) TECH LIMITED | Private company limited by shares | Dissolved |
| XGIGA COMMUNICATION TECH CO., LIMITED | Private company limited by shares | Dissolved |
| YUNTION COMMUNICATION TECH LIMITED | | Live |
| HK ZHIXIN COMMUNICATION TECH LIMITED | Private company limited by shares | Live |
| TECH-IN COMMUNICATION (HK) CO., LIMITED | Private company limited by shares | Live |
| Listen Techlogy Communication Co., Limited | | Live |
| COMMUNICATION TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| TECHNOLOGIES & COMMUNICATION LIMITED | Private company limited by shares | Live |
| ADVANCED COMMUNICATION & TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| Anywave Communication Technologies (hk) Limited | Private company limited by shares | Live |
| ASIA COMMUNICATION TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| REACHER COMMUNICATION TECHNOLOGIES (HK) CO., LIMITED | Private company limited by shares | Live |
| BEST GLORY TECHNOLOGIES (COMMUNICATION) LIMITED | Private company limited by shares | Dissolved |
| M.C.L. COMMUNICATION TECHNOLOGIES LIMITED | Private company limited by shares | Dissolved |
| PRECISION TECHNOLOGIES (COMMUNICATION) COMPANY LIMITED | Private company limited by shares | Dissolved |
| SHENBO COMMUNICATION TECHNOLOGIES (HONG KONG) LIMITED | Private company limited by shares | Live |
| ALL STAR COMMUNICATION TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| TODAY TECHNOLOGIES (COMMUNICATION) COMPANY LIMITED | Private company limited by shares | Dissolved |
| United Communication Technologies Company Limited | Private company limited by shares | Dissolved |