East Asia

Bhutan

• Bhutan Telecom

Brunei Darussalam

• Jabatan Telekom Brunei (JTB)
• Department of Telecommunications

Cambodia

• Camintel
• Ministry of Posts & Telecommunications

China

• China Telecom
• Cognigen Networks Inc

Hong Kong

• City Telecom
• PCCW

Indonesia

• Telkom

Japan

• Nippon Telegraph & Telephone Corp (NTT)
• Tamura Electric

Macau

• CTM

Malaysia

• Telekom Malaysia Berhad
• Time Reach Sdn Bhd (TRSB)

Mongolia

• Mongolia Telecom

The Philippines

• BayanTel
• Globe Telecom
• Philippine Long Distance Telephone Co (PLDT)

Singapore

• Singapore Telecom
• StarHub

South Korea

• Korea Telecom

Taiwan

• Chunghwa Telecom
• Directorate General of Telecommunications (DGT)

Thailand

• Telephone Organization of Thailand (TOT)
• ThaiTel

Vietnam

• Vietnam Posts & Telecommunications (VNPT)