<SEC-DOCUMENT>0001564590-21-035050-index.html : 20210629
<SEC-HEADER>0001564590-21-035050.hdr.sgml : 20210629
<ACCEPTANCE-DATETIME>20210629154017
ACCESSION NUMBER:		0001564590-21-035050
CONFORMED SUBMISSION TYPE:	11-K
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20201231
FILED AS OF DATE:		20210629
DATE AS OF CHANGE:		20210629

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ADTRAN INC
		CENTRAL INDEX KEY:			0000926282
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE & TELEGRAPH APPARATUS [3661]
		IRS NUMBER:				630918200
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		11-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-24612
		FILM NUMBER:		211057985

	BUSINESS ADDRESS:	
		STREET 1:		901 EXPLORER BLVD
		CITY:			HUNTSVILLE
		STATE:			AL
		ZIP:			35806
		BUSINESS PHONE:		256-963-8220

	MAIL ADDRESS:	
		STREET 1:		901 EXPLORER BLVD
		CITY:			HUNTSVILLE
		STATE:			AL
		ZIP:			35806
</SEC-HEADER>
<DOCUMENT>
<TYPE>11-K
<SEQUENCE>1
<FILENAME>adtn-11k_20201231.htm
<DESCRIPTION>11-K
<TEXT>
Document 1 - file: adtn-11k_20201231.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>2
<FILENAME>adtn-ex231_6.htm
<DESCRIPTION>EX-23.1
<TEXT>
Document 2 - file: adtn-ex231_6.htm

</DOCUMENT>
</SEC-DOCUMENT>