| TELEWORLD TELECOM LIMITED | Private company limited by shares | Dissolved |
| TELTONE TELECOM LIMITED | Private company limited by shares | Dissolved |
| TENCOM TELECOM (ASIA) LIMITED | Private company limited by shares | Live |
| HUI TENG TELECOM LIMITED | Private company limited by shares | Live |
| TERMAX TELECOM LIMITED | Private company limited by shares | Live |
| TERNARY TELECOM LIMITED | Private company limited by shares | Live |
| THREE BIZ TELECOM LIMITED | Private company limited by shares | Live |
| TIME TELECOM LIMITED | Private company limited by shares | Dissolved |
| TIMES TELECOM LIMITED | Private company limited by shares | Live |
| TINY TELECOM LIMITED | Private company limited by shares | Dissolved |
| Tiny Telecom Limited | Private company limited by shares | Live |
| T-Link Telecom Limited | | Live |
| LI TONG TELECOM LIMITED | Private company limited by shares | Live |
| TONG WAN LI TELECOM LIMITED | Private company limited by shares | Dissolved |
| TONG HUI TELECOM LIMITED | | Live |
| CENTURY TELECOM TONGYUN COMPANY LIMITED | Private company limited by shares | Dissolved |
| TELECOM TOOLS LIMITED | Private company limited by shares | Live |
| TOPAZ TELECOM LIMITED | Private company limited by shares | Live |
| TOPCOM TELECOM LIMITED | | Live |
| TOPNETS GLOBAL TELECOM LIMITED | Private company limited by shares | Live |
| TOPTECH TELECOM LIMITED | Private company limited by shares | Dissolved |
| TOWERCREST TELECOM LIMITED | Private company limited by shares | Live |
| BEL TRADE TELECOM LIMITED | Private company limited by shares | Dissolved |
| HW Telecom Trade Limited | Private company limited by shares | Live |
| Tougher Telecom Electric Trade Limited | | Live |
| TELECOM TRADING LIMITED | Private company limited by shares | Live |
| ACE TELECOM TRADING LIMITED | Private company limited by shares | Dissolved |
| GSM TELECOM TRADING LIMITED | Private company limited by shares | Live |
| CL Telecom Trading Limited | Private company limited by shares | Live |
| KR Telecom Trading Limited | | Live |
| SK Telecom Trading Limited | | Live |
| ASIA TELECOM TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| CHINA TELECOM 3G TRADING GROUP LIMITED | Private company limited by shares | Dissolved |
| CYBERWORKS TELECOM TRADING LIMITED | Private company limited by shares | Dissolved |
| DESEWAY TELECOM TRADING LIMITED | Private company limited by shares | Live |
| Duck Kee Telecom Trading Limited | Private company limited by shares | Live |
| DYNAMIC TELECOM TRADING LIMITED | Private company limited by shares | Live |
| EASTERN TELECOM TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| FAST TELECOM GENERAL TRADING LIMITED | Private company limited by shares | Live |
| GAOMEI TELECOM TRADING (HK) LIMITED | Private company limited by shares | Live |
| HEYDAY TELECOM TRADING LIMITED | Private company limited by shares | Dissolved |
| PACIFIC TELECOM TRADING HOLDING LIMITED | Private company limited by shares | Live |
| Capgemini Telecom (Hong Kong) Trading Limited | | Live |
| HONG LUNG TELECOM TRADING COMPANY LIMITED | Private company limited by shares | Dissolved |
| ICUBE TELECOM TRADING LIMITED | Private company limited by shares | Live |
| INTERCELL TELECOM TRADING LIMITED | Private company limited by shares | Live |
| Chung Long Telecom Trading Limited | Private company limited by shares | Live |
| CHUNG LONG TELECOM TRADING LIMITED | Private company limited by shares | Live |
| EASY RICH TELECOM TRADING LIMITED | Private company limited by shares | Live |
| Sigma Telecom and Trading Co., Limited | Private company limited by shares | Live |
| WINLUNG TELECOM TRADING LIMITED | Private company limited by shares | Dissolved |
| TransAsia Telecom Limited | Private company limited by shares | Live |
| TRANSIT TELECOM HK LIMITED | Private company limited by shares | Dissolved |
| TRANS-NATIONAL TELECOM SYSTEM (HK) LIMITED | Private company limited by shares | Dissolved |
| TRANS-NOVA TELECOM LIMITED | Private company limited by shares | Dissolved |
| TRINIX TELECOM LIMITED | Private company limited by shares | Live |
| SHENZHEN TRUEWONDER NETWORK TELECOM CO., LIMITED | Private company limited by shares | Dissolved |
| CHUNG KIU TRUNKING TELECOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| TRUSTY TELECOM LIMITED | Private company limited by shares | Live |
| TSUENY TELECOM INVESTMENT LIMITED | Private company limited by shares | Dissolved |
| YEE TUNG TELECOM LIMITED | Private company limited by shares | Live |
| HONG KONG HANG TUNG TELECOM LIMITED | Private company limited by shares | Dissolved |
| WANG TUNG TELECOM LIMITED | Private company limited by shares | Dissolved |
| YUET TUNG TELECOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| TUNGYUNG TELECOM LIMITED | Private company limited by shares | Live |
| Turbo Fast Telecom International Limited | Private company limited by shares | Live |
| TURBO TELECOM SERVICE LIMITED | Private company limited by shares | Dissolved |
| TVOICE TELECOM LIMITED | Private company limited by shares | Live |
| Twenty Seven Telecom Limited | | Live |
| UMIX Telecom Co., LIMITED | Private company limited by shares | Live |
| Unicell Telecom Limited | Private company limited by shares | Live |
| UNICOM TELECOM HK LIMITED | Private company limited by shares | Live |
| UNIFIED TELECOM COMPANY LIMITED | Private company limited by shares | Live |
| UNIGLOBE TELECOM (FAR EAST) LIMITED | Private company limited by shares | Dissolved |
| UNI-LINK TELECOM & NETWORKS LIMITED | Private company limited by shares | Dissolved |
| UNIMAX TELECOM LIMITED | Private company limited by shares | Dissolved |
| TELECOM UNION LIMITED | Private company limited by shares | Dissolved |
| UNITECH TELECOM (HONG KONG) LIMITED | Private company limited by shares | Dissolved |
| UNITED TELECOM LIMITED | Private company limited by shares | Live |
| HK UNITED TELECOM LIMITED | Private company limited by shares | Live |
| CHINASIN UNITED TELECOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| PACIFIC UNITED TELECOM CO., LIMITED | Private company limited by shares | Live |
| SUPER UNITED TELECOM LIMITED | Private company limited by shares | Live |
| UNIVERSAL TELECOM COMPANY LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL TELECOM LIMITED | Private company limited by shares | Live |
| UNIVERSAL HT TELECOM LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL TELECOM HK CO. LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL TELECOM ENGINEERING LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL TELECOM (HOLDING) LIMITED | Private company limited by shares | Dissolved |
| UNIVERSAL TRADING COMPANY (TELECOM) LIMITED | Private company limited by shares | Dissolved |
| TELECOM UNIVERSE, LIMITED | Private company limited by shares | Live |
| UNIVERSE TELECOM LIMITED | Private company limited by shares | Dissolved |
| UNIVERSE INTERNATIONAL TELECOM LIMITED | Private company limited by shares | Dissolved |
| Smart Universe Telecom Limited | Private company limited by shares | Live |
| UNIVISION TELECOM LIMITED | Private company limited by shares | Dissolved |
| UNLIMITED TELECOM LIMITED | Private company limited by shares | Live |
| China Uotocom International Telecom Group Limited | Private company limited by shares | Live |
| UPGRADE TELECOM LIMITED | Private company limited by shares | Dissolved |
| U-PHONE TELECOM (HONGKONG) LIMITED | Private company limited by shares | Live |
| UTONE TELECOM LIMITED | Private company limited by shares | Live |