Exhibit 21
SUBSIDIARIES OF ADTRAN HOLDINGS, INC.
December 31, 2022
Name of Subsidiary |
|
Country or State of Incorporation |
|
|
|
ADTRAN Networks Pty. Ltd |
|
Australia |
ADTRAN Networks Comunicações Ltda. |
|
Brazil |
ADTRAN Canada, Inc. |
|
Canada |
ADTRAN d.o.o. |
|
Croatia |
ADTRAN International, Inc. |
|
State of Delaware |
ADTRAN Networks Worldwide, Inc. |
|
State of Delaware |
ADTRAN Networks, LLC |
|
State of Delaware |
Bluesocket, Inc. |
|
State of Delaware |
ADTRAN Oy |
|
Finland |
ADTRAN GmbH |
|
Germany |
ADTRAN Networks M.E.P.E. |
|
Greece |
ADTRAN Networks India Private Limited |
|
India |
ADTRAN Holdings Ltd. |
|
Israel |
ADTRAN S.R.L. |
|
Italy |
ADTRAN K.K. |
|
Japan |
ADTRAN Networks Sdn Bhd |
|
Malaysia |
ADTRAN Networks S.A. de C.V. |
|
Mexico |
ADTRAN Networks & Services, S. de R.L. de C.V. |
|
Mexico |
ADTRAN Peru S.R.L. |
|
Peru |
ADTRAN Sp. z.o.o. |
|
Poland |
ADTRAN, Unipessoal Lda. |
|
Portugal |
ADTRAN International, Inc. - Saudi Arabia branch |
|
Saudi Arabia |
ADTRAN s.r.o. |
|
Slovakia |
ADTRAN Proprietary Ltd. |
|
South Africa |
ADTRAN Switzerland GmbH |
|
Switzerland |
ADTRAN GmbH (Tunisia Permanent Establishment Branch Office) |
|
Tunisia |
ADTRAN SARL |
|
Tunisia |
ADTRAN Europe Limited |
|
United Kingdom |
ADTRAN Networks and Services Egypt, LLC |
|
Egypt |
ADTRAN Networks New Zealand Ltd. |
|
New Zealand |
ADVA Optical Networking, SE |
|
Germany |
ADVA Optical Networking North America, Inc. |
|
State of Georgia |
ADVA Optical Networking Ltd. |
|
United Kingdom |
Oscilloquartz SA |
|
Switzerland |
ADVA Optical Networking sp. z o.o. |
|
Poland |
ADVA Optical Networking Israel Ltd. |
|
Israel |
ADVA Optical Networking (Shenzhen) Ltd. |
|
China |
Oscilloquartz Finland Oy |
|
Finland |
ADVA IT Solutions Pvt. Ltd. |
|
India |
ADVA Optical Networking Trading (Shenzhen) Ltd. |
|
China |
ADVA Optical Networking Singapore Pte. Ltd. |
|
Singapore |
ADVA Optical Networking Hong Kong Ltd. |
|
China |
ADVA Optical Networking (India) Private Ltd. |
|
India |
ADVA Optical Networking Serviços Brazil Ltda. |
|
Brazil |
ADVA Optical Networking Corp. |
|
Japan |
ADVA Optical Networking AB |
|
Sweden |
ADVA NA Holdings Inc. |
|
State of Georgia |
ADVA Optical Networking Pty Ltd. |
|
Australia |
ADVA Optical Networking B.V. |
|
Netherlands |
ADVA Canada Inc. |
|
Canada |
Adva Network Security GmbH |
|
Germany |
|
|
|