Form: 10-K

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

February 22, 2022


Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT
Entity Name  Jurisdiction
Calix Network Technology Development (Nanjing) Co. Ltd.China
Calix Networks UK, Ltd.                          England, UK
CIDC Private LimitedIndia
Calix International, Inc.United States
Calix Brasil Servicos Ltda.Brazil