    <SEC-DOCUMENT>0001193125-17-322087-index.html : 20171027
    <SEC-HEADER>0001193125-17-322087.hdr.sgml : 20171027
    <ACCEPTANCE-DATETIME>20171027080423
    ACCESSION NUMBER:		0001193125-17-322087
    CONFORMED SUBMISSION TYPE:	S-1/A
    PUBLIC DOCUMENT COUNT:		11
    FILED AS OF DATE:		20171027
    DATE AS OF CHANGE:		20171027

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Bandwidth Inc.
    		CENTRAL INDEX KEY:			0001514416
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-PREPACKAGED SOFTWARE [7372]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		S-1/A
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-220945
    		FILM NUMBER:		171157988

    	BUSINESS ADDRESS:
    		STREET 1:		900 MAIN CAMPUS DRIVE
    		CITY:			RALEIGH
    		STATE:			NC
    		ZIP:			27606
    		BUSINESS PHONE:		919-439-4171

    	MAIL ADDRESS:
    		STREET 1:		900 MAIN CAMPUS DRIVE
    		CITY:			RALEIGH
    		STATE:			NC
    		ZIP:			27606

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Bandwidth.com, Inc.
    		DATE OF NAME CHANGE:	20110303
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>S-1/A
    <SEQUENCE>1
    <FILENAME>d416018ds1a.htm
    <DESCRIPTION>AMENDMENT NO. 2 TO FORM S-1
    <TEXT>
    Document 1 - file: d416018ds1a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-3.1
    <SEQUENCE>2
    <FILENAME>d416018dex31.htm
    <DESCRIPTION>EX-3.1
    <TEXT>
    Document 2 - file: d416018dex31.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-3.2
    <SEQUENCE>3
    <FILENAME>d416018dex32.htm
    <DESCRIPTION>EX-3.2
    <TEXT>
    Document 3 - file: d416018dex32.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.21
    <SEQUENCE>4
    <FILENAME>d416018dex1021.htm
    <DESCRIPTION>EX-10.21
    <TEXT>
    Document 4 - file: d416018dex1021.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-23.1
    <SEQUENCE>5
    <FILENAME>d416018dex231.htm
    <DESCRIPTION>EX-23.1
    <TEXT>
    Document 5 - file: d416018dex231.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g4160181a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g4160181a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g4160182a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g4160182a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>g4160183a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g4160183a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>g416018cov76.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g416018cov76.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>g416018g20l05.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: g416018g20l05.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>g416018g79k10.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: g416018g79k10.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>