| SANMU COMMUNICATION TECHNOLOGY (H.K.) LIMITED | Private company limited by shares | Dissolved |
| HK SHANGHAOJI COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Shengyuan Communication Technology Limited | Private company limited by shares | Live |
| SHENZHEN KRS COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Shigeng Communication Technology (HK) Co., Limited | | Live |
| SINGHOO COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| SinoCloud Communication Technology Limited | | Live |
| SINOEXC COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Soling Communication Technology (HongKong) Co., Limited | Private company limited by shares | Live |
| KIN STAR COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| STAR COMMUNICATION TECHNOLOGY CO., LIMITED | Private company limited by shares | Dissolved |
| SEA STAR COMMUNICATION TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| SUPER COMMUNICATION TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| TALENT COMMUNICATION TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Dissolved |
| TayMobile Communication Technology Limited | Private company limited by shares | Live |
| T-fiber HK Communication Technology Co., Limited | Private company limited by shares | Live |
| TianLai Communication Technology Co., Limited | Private company limited by shares | Live |
| TIANYATONG COMMUNICATION TECHNOLOGY (SHENZHEN) LIMITED | Private company limited by shares | Dissolved |
| TIMO COMMUNICATION TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Live |
| Toyoky Communication Technology Company Limited | Private company limited by shares | Live |
| Unicair Communication Technology Limited | Private company limited by shares | Live |
| UTOP COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| VAST COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| HK VELL-COM COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| RATIONAL VIDEO & COMMUNICATION TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| WELLBE COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| WELLGIN COMMUNICATION TECHNOLOGY (HK) LIMITED | Private company limited by shares | Dissolved |
| Communication World Wide Technology Limited | Private company limited by shares | Live |
| WINTEK COMMUNICATION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| WINUP COMMUNICATION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| XINDA COMMUNICATION TECHNOLOGY (HK) LIMITED | Private company limited by shares | Dissolved |
| XINGQI COMMUNICATION TECHNOLOGY (H.K.) LIMITED | Private company limited by shares | Dissolved |
| Xinke Communication Technology Co., Limited | Private company limited by shares | Live |
| HK XUANDI COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| XUDONG COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| Xuhui Communication Technology Co., Limited | Private company limited by shares | Live |
| YOUFUN COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| KAM YUEN COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| YUYI COMMUNICATION & TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| ZEJIA COMMUNICATION TECHNOLOGY LIMITED | | Live |
| Zhengda Communication Technology Co., Limited | Private company limited by shares | Live |
| HK ZHENGKANG COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ZHENGTONG GLORY COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ZHONGCHENG COMMUNICATION TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| ZHONGRUI COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| ZIFRIEND COMMUNICATION TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| TOP TEL. COMMUNICATION LIMITED | Private company limited by shares | Live |
| TELCONN COMMUNICATION TECHNOLOGIES CO., LIMITED | Private company limited by shares | Live |
| TELE-ACCESS COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| TELEASIA COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| Telecho Communication Limited | Private company limited by shares | Live |
| Telefong Communication (HK) Co., Limited | | Live |
| TELENCO COMMUNICATION INVESTMENT LIMITED | Private company limited by shares | Live |
| TELESYS COMMUNICATION INTERNATIONAL COMPANY LIMITED | Private company limited by shares | Dissolved |
| TELEUNIT COMMUNICATION LIMITED | Private company limited by shares | Live |
| I Tell Communication Limited | Private company limited by shares | Dissolved |
| TELLON COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| Tendency Communication Limited | | Live |
| Tengiga Communication Tech Co., Limited | Private company limited by shares | Dissolved |
| TEXGAR COMMUNICATION ACCESSORIES LIMITED | Private company limited by shares | Dissolved |
| China Internet of Things Communication Group Limited | Private company limited by shares | Live |
| Think Big Communication Limited | Private company limited by shares | Live |
| Tianma Communication Limited | Private company limited by shares | Live |
| TIANQING COMMUNICATION (HK) CO., LIMITED | Private company limited by shares | Live |
| HK TIANSHAN SHENGLIN INTERNATIONAL CAREERS CULTURE COMMUNICATION LIMITED | Private company limited by shares | Live |
| TIANYU COMMUNICATION EQUIPMENT (H.K.) LIMITED | Private company limited by shares | Dissolved |
| CHINA TIBETAN PLATEAU CULTURE COMMUNICATION LIMITED | Private company limited by shares | Live |
| CHINA TIBETAN MASTIFF CULTURAL COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| TICINO COMMUNICATION TECHNOLOGY (HK) LIMITED | Private company limited by shares | Live |
| New Time Communication Limited | Private company limited by shares | Live |
| TIMES COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| TITAN COMMUNICATION SYSTEMS LIMITED | Private company limited by shares | Live |
| Tnpin Communication Group Limited | | Live |
| TODAY'S COMMUNICATION EQUIPMENT LIMITED | Private company limited by shares | Live |
| Easy Tone Communication Limited | Private company limited by shares | Live |
| Ji Tong Communication (HK) Limited | Private company limited by shares | Dissolved |
| JI TONG COMMUNICATION INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| CHINA TONGGONG CULTURE COMMUNICATION LIMITED | Private company limited by shares | Live |
| TOPASIA COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| TOPFLY COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| TOPLINK COMMUNICATION INTERNATIONAL LIMITED | Private company limited by shares | Live |
| TOPPING COMMUNICATION (CHINA) SHARES LIMITED | Private company limited by shares | Live |
| TOPPING COMMUNICATION (INTERNATIONAL) SHARES LIMITED | Private company limited by shares | Live |
| TOPTONE COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| TOPUS COMMUNICATION LIMITED | | Live |
| TOUCAN COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| TOWER & YOUNG COMMUNICATION (HK) CO., LIMITED | Private company limited by shares | Live |
| TOYO COMMUNICATION TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| TRACENET COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| COMMUNICATION TRACKING SYSTEMS LIMITED | Private company limited by shares | Live |
| XIN WEI COMMUNICATION TRADE LIMITED | Private company limited by shares | Live |
| RUI DA COMMUNICATION TRADE LIMITED | | Live |
| JIECHI Communication Equipment Trade Limited | Private company limited by shares | Live |
| SAN HE COMMUNICATION TRADING LIMITED | Private company limited by shares | Live |
| Top Communication Trading Company Limited | Private company limited by shares | Live |
| AD-HONORES COMMUNICATION & TRADING LIMITED | Private company limited by shares | Live |
| BANDE COMMUNICATION TRADING CO., LIMITED | | Live |
| PURE Communication Trading Limited | | Live |
| COMMUNICATION SHIPPING & TRADING COMPANY, LIMITED | Private company limited by shares | Dissolved |
| SOUTH COMMUNICATION TRADING LIMITED | Private company limited by shares | Dissolved |