| 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 |
| COMMUNICATION TECHNOLOGY TRADING LIMITED | Private company limited by shares | Dissolved |
| Xinhe Communication International Trading Co., Limited | Private company limited by shares | Live |
| TRANSSION COMMUNICATION LIMITED | Private company limited by shares | Live |
| S&T Travel And Communication Limited | Private company limited by shares | Dissolved |
| Travel Communication Limited | Private company limited by shares | Live |
| HONGKONG (ASIA) TREASURE VIDEO CULTURE COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| TreLink Communication Co., Limited | Private company limited by shares | Live |
| TrendInsight Digital Communication Co., Limited | Private company limited by shares | Live |
| TRETY COMMUNICATION LIMITED | Private company limited by shares | Live |
| TRIQUALITY COMMUNICATION (HK) LIMITED | Private company limited by shares | Live |
| QUANZHOU TRUEST COMMUNICATION CO., LIMITED | Private company limited by shares | Live |
| TRUTH COMMUNICATION LIMITED | Private company limited by shares | Live |
| TUBRAINS BUSINESS COMMUNICATION COMPANY LIMITED | Private company limited by shares | Dissolved |
| TUNDA COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| SEA TUNE COMMUNICATION COMPANY LIMITED | Private company limited by shares | Live |
| TAI TUNG COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| WON TUNG COMMUNICATION LIMITED | Private company limited by shares | Live |
| HOI TUNG COMMUNICATION & NAVIGATION CO., LIMITED | Private company limited by shares | Live |
| Turbospeed Communication Limited | Private company limited by shares | Live |
| TURBOSTAR COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| TUXCEL COMMUNICATION COMPANY LIMITED | Private company limited by shares | Live |
| Ukraine-China Communication Limited | Private company limited by shares | Live |
| Ultranet Communication Limited | | Live |
| U-MI COMMUNICATION CO., LIMITED | Private company limited by shares | Dissolved |
| UNEEDIQUE COMMUNICATION LIMITED | Private company limited by shares | Live |
| UNICOM COMMUNICATION TECHNOLOGY CO. LIMITED | Private company limited by shares | Live |
| UNICORN COMMUNICATION LIMITED | Private company limited by shares | Live |
| UNIKA COMMUNICATION COMPANY LIMITED | Private company limited by shares | Live |
| Unilink Communication Company Limited | Private company limited by shares | Live |
| UNIPHONE COMMUNICATION CO., LIMITED | Private company limited by shares | Live |
| UNIQUE COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| United Electric communication (HK) Limited | | Live |
| ASIA PACIFIC UNITED COMMUNICATION LIMITED | Private company limited by shares | Live |
| UNITED COMMUNICATION SYSTEM LIMITED | Private company limited by shares | Live |
| UNITED SYSTEM COMMUNICATION LIMITED | Private company limited by shares | Dissolved |
| UNITED COMMUNICATION TECHNOLOGY LIMITED | Private company limited by shares | Live |
| UNITEL COMMUNICATION LIMITED | Private company limited by shares | Live |
| CHINA UNITY COMMUNICATION (H.K.) LIMITED | Private company limited by shares | Dissolved |
| UNIVER COMMUNICATION TECHNOLOGY CO. LIMITED | Private company limited by shares | Dissolved |