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        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001804735</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001514416</issuerCik>
            <issuerName>BANDWIDTH INC</issuerName>
            <secFileNumber>001-38285</secFileNumber>
            <issuerAddress>
                <ns2:street1>2230 Bandmate Way</ns2:street1>
                <ns2:city>Raleigh</ns2:city>
                <ns2:stateOrCountry>NC</ns2:stateOrCountry>
                <ns2:zipCode>27607</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>9194394171</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>REBECCA G BOTTORFF &amp; GREGORY L BOTTORFF </nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>6232</noOfUnitsSold>
            <aggregateMarketValue>119966.00</aggregateMarketValue>
            <noOfUnitsOutstanding>24312661</noOfUnitsOutstanding>
            <approxSaleDate>03/05/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>02/28/2024</acquiredDate>
            <natureOfAcquisitionTransaction>PSU MBO Bonus Grant</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>6232</amountOfSecuritiesAcquired>
            <paymentDate>02/28/2024</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>03/05/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>06/14/2023</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Rebecca G Bottorff</signature>
        </noticeSignature>
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144
0001804735
XXXXXXXX
LIVE
0001514416
BANDWIDTH INC
001-38285
2230 Bandmate Way
Raleigh
NC
27607
9194394171
REBECCA G BOTTORFF & GREGORY L BOTTORFF
Officer
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
6232
119966.00
24312661
03/05/2024
NASDAQ
Common
02/28/2024
PSU MBO Bonus Grant
Issuer
N
6232
02/28/2024
N/A
Y
03/05/2024
06/14/2023
/s/ Rebecca G Bottorff