Chunghwa Telecom Co., Ltd.

No.21-3, Sec. 1, Xinyi Rd., Zhongzheng Dist., Taipei City 10048, Taiwan
Tel:(02)2344-6789
https://www.cht.com.tw

Taiwan Telecommunication Engineering Industry Association

7 F-5, No.1, Sec. 4, Xinyi Rd., Da'an Dist., Taipei City 10684, Taiwan
Tel: (02)2701-3838
(02)2707-3939
tteia@tteia.org.tw
https://www.tteia.org.tw

Asia Pacific Telecom Co., Ltd.

Chunghwa Telecom

Fareastone Telecommunications Co., Ltd.

No.468, Ruiguang Rd., Neihu Dist., Taipei City 11492, Taiwan
Tel: (02)7723-5000
(02)7723-5299
https://www.fetnet.net

Taiwan Star Telecom Co., Ltd.