- Beijing Telecom NTT Engineering Co.,Ltd.
- Shanghai NTT Telecommunications Engineering Co., Ltd.
- NTT Communications China Co., Ltd.
 NTT Com Asia Limited [Plus one subsidiary]
 HKNet Company Limited [Plus two of its subsidiaries]
- NTT Taiwan Ltd.
 NTT KOREA Co., Ltd.
 NTT MSC SDN BHD
 NTT Communications (Thailand) Co., Ltd. [Plus one subsidiary]
- NTT Communications (Vietnam) Limited.
 SRI LANKA TELECOM LIMITED.
 NTT Singapore Pte. Ltd.
- P.T.NTT Indonesia [Plus one subsidiary]
 NTT AUSTRALIA PTY.LTD.
- NTT Communications India Private Limited

 NTT America ,Inc. [Plus one subsidiary]
 NTT MULTIMEDIA COMMUNICATIONS LABORATORIES,INC.
 Verio Inc. [Plus nine of its subsidiaries]
- NTT Comunicacoes do Brasil Participacoes Ltda.
 NTT do Brasil Telecomunicacoes Ltda.

 NTT EUROPE LTD.

 INTERNET MULTIFEED CO.
- NTT Intelligent planning & Development Co., Ltd
- NTT Worldwide Telecommunications Corporation
- NTT Com CHEO Corporation
- NTT NaviSpace Corporation
 NTT PC COMMUNICATIONS Inc.
- NTT Visual Communications System Inc.
- NTT BizLink, Inc.
- NTT FANET SYSTEMS CORPRATION
- NTT Resonant Inc.
 NTT WORLD ENGINEERING MARINE CORPORATION [Plus one subsidiary]
- Business Communication System Engineering Co., Ltd
 JSAT Corporation
- Nippon Intelligent-Building Systems Corporation
- Bicom Corporation
- Plala Networks Inc.
- Broadband Engineering Corporation

 PLDT
 StarHub Ltd