ADTRAN (ADTN) 8-K/A Departure of Directors or Certain Officers

Exhibit 23.1

CONSENT OF INDEPENDENT AUDITORS

We hereby consent to the incorporation by reference in the Registration Statementson Form S-8(Nos. 333-266089 and 333-266091) of ADTRAN Holdings, Inc. of our report dated March 10, 2022 relating to the financial statements of ADVA Optical Networking SE, which appears in this Current Report on Form 8-K/A.

Munich, Germany

September 30, 2022

PricewaterhouseCoopers GmbH

Wirtschaftsprüfungsgesellschaft

/s/Jürgen Schumann /s/ppa. Ralph Jakobi

Jürgen Schumann ppa. Ralph Jakobi

Wirtschaftsprüfer Wirtschaftsprüfer

(German Public Auditor) (German Public Auditor)

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