| TENRY COMMUNICATIONS CO., LIMITED | Private company limited by shares | Live |
| TERA COMMUNICATIONS, LIMITED | Private company limited by shares | Dissolved |
| TERICOM COMMUNICATIONS (HONG KONG) COMPANY LIMITED | Private company limited by shares | Dissolved |
| MORE THAN COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| THERMOR COMMUNICATIONS (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| THINKER COMMUNICATIONS TECHNOLOGY (HK) CO., LIMITED | Private company limited by shares | Dissolved |
| Thrive PR & Communications Limited | Private company limited by shares | Live |
| Tianfeng (Hong Kong) Communications Limited | Private company limited by shares | Live |
| TIANQIN COMMUNICATIONS (HK) LIMITED | Private company limited by shares | Dissolved |
| TianShiLi Communications equipment Limited | Private company limited by shares | Dissolved |
| TIANYU COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TIEN-DI COMMUNICATIONS COMPANY LIMITED | Private company limited by shares | Live |
| T.M. COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TOKEY COMMUNICATIONS SERVICE LIMITED | Private company limited by shares | Live |
| TOMORROW COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| HOT TONE COMMUNICATIONS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| LUCKY TONE COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| Tongzhou Communications Limited | Private company limited by shares | Live |
| TONNET COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TOOB Creative Communications Limited | Private company limited by shares | Live |
| TOPLIST COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TOPS COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TOPWISE COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| Toro Communications Limited | Private company limited by shares | Live |
| TOTAL COMMUNICATIONS CORPORATION LIMITED | Private company limited by shares | Dissolved |
| TOWER COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| T.P. COMMUNICATIONS COMPANY LIMITED | Private company limited by shares | Live |
| FACEFONE TRADING AND COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| HANDART COMMUNICATIONS TRADING LIMITED | Private company limited by shares | Dissolved |
| COMMUNICATIONS TRADING (HK) LIMITED | Private company limited by shares | Live |
| COMMUNICATIONS HUB TRADING (HK) LIMITED | Private company limited by shares | Live |
| MORGENSTERN TRADING & COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| Telcel Communications and Trading Limited | Private company limited by shares | Dissolved |
| TELPO COMMUNICATIONS TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| VTech Communications Trading Limited | Private company limited by shares | Live |
| TRANS COM COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TRANS COMMUNICATIONS LIMITED | | Live |
| TRANSGLOBAL COMMUNICATIONS GROUP HK LIMITED | Private company limited by shares | Dissolved |
| TRANSLINK COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TRANSMEDIA COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TRANS-NOVA COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TRANS-PACIFIC COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| AERO-SPACE TRAVEL SATELLITE COMMUNICATIONS (HK) COMPANY LIMITED | Private company limited by shares | Dissolved |
| SPACE TRAVEL COMMUNICATIONS LIMITED | | Live |
| Oak Tree Communications Limited | Private company limited by shares | Live |
| TRILOGY COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| Triniti Communications Limited | Private company limited by shares | Live |
| TRINITY COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TRIO COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TRIO Communications Limited | Private company limited by shares | Live |
| TRIPLEX COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TRIPOD COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TROIKA COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TROON COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TRUE COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| TruLink Communications Limited | Private company limited by shares | Live |
| TUMBLEWEED COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| TUNG NAM COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| UCMS Communications Corporation Limited | Private company limited by shares | Live |
| ULTRANET COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| UNICOM COMMUNICATIONS COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNICORN COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| UNICORN COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| UNIFI COMMUNICATIONS HK LIMITED | Private company limited by shares | Dissolved |
| UNILINK COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| UNIPOWER COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| UNITED COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| ONE UNITED COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| UNITED COMMUNICATIONS (H.K.) CORPORATION LIMITED | Private company limited by shares | Live |
| UNITED COMMUNICATIONS (HK) LIMITED | Private company limited by shares | Dissolved |
| United Network Communications Limited | | Live |
| UNITEL HK COMMUNICATIONS TECHNOLOGY LIMITED | Private company limited by shares | Dissolved |
| Universal Communications International Company Limited | Private company limited by shares | Live |
| UNIVERSITY OF COMMUNICATIONS (HONG KONG) LIMITED | Private company limited by shares | Live |
| UNLIMITED COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| COMMUNICATIONS UNLIMITED LIMITED | Private company limited by shares | Dissolved |
| UPON COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| UPON-A-STAR COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| AD VALUE COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| VANE COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| VEGA COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| VEGGIE M COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| VENTURE COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| VERIDONE COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| HEADWAY VERMONT COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| Versawire Communications (H.K) Limited | Private company limited by shares | Dissolved |
| Victoria Communications Limited | Private company limited by shares | Live |
| VICTORY COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| VIDEO COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| ViDeOnline Communications (Asia) Limited | Private company limited by shares | Live |
| ViDeOnline Communications (HK) Limited | Private company limited by shares | Live |
| VIDIA COMMUNICATIONS INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| VIPER COMMUNICATIONS ASIA LIMITED | Private company limited by shares | Dissolved |
| Virtree Communications Limited | Private company limited by shares | Live |
| VISION COMMUNICATIONS LIMITED | Private company limited by shares | Live |
| SKY VISION COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| Visionary Communications Consultancy Limited | Private company limited by shares | Live |
| VISIONS COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| VISUAL COMMUNICATIONS LIMITED | Private company limited by shares | Dissolved |
| ig Visual Communications Limited | | Live |