Form: 10-K

Annual report [Section 13 and 15(d), not S-K Item 405]

February 22, 2021


Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT
Entity Name  Jurisdiction
Calix Network Technology Development (Nanjing) Co. Ltd.China
Calix Networks UK, Ltd.                          England, UK
Calix Brasil Servicos Ltda.Brazil