<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-01-29</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000030419</issuerCik>
        <issuerName>DEX ONE Corp</issuerName>
        <issuerTradingSymbol>RHDC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001035242</rptOwnerCik>
            <rptOwnerName>WILLIAMS BARRY LAWSON</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>DEX ONE CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>1001 WINSTEAD DRIVE</rptOwnerStreet2>
            <rptOwnerCity>CARY</rptOwnerCity>
            <rptOwnerState>NC</rptOwnerState>
            <rptOwnerZipCode>27513</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

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    <derivativeTable>
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        <derivativeTransaction>
            <securityTitle>
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                </underlyingSecurityTitle>
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            </underlyingSecurity>
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        <derivativeTransaction>
            <securityTitle>
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                <value>2010-01-29</value>
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                <transactionShares>
                    <value>1500</value>
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                <transactionPricePerShare>
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            <expirationDate>
                <footnoteId id="F1"/>
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            <underlyingSecurity>
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                </underlyingSecurityTitle>
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                </sharesOwnedFollowingTransaction>
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                <footnoteId id="F1"/>
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                </underlyingSecurityTitle>
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                </underlyingSecurityShares>
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                    <value>0</value>
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    </derivativeTable>

    <footnotes>
        <footnote id="F1">Pursuant to the Joint Plan of Reorganization of the issuer and its subsidiaries, which was approved by the United States Bankruptcy Court for the District of Delaware, each share of the issuer's common stock and all preferred interests or other instruments evidencing an ownership interest in the issuer outstanding prior to the date of the issuer's emergence from bankruptcy were cancelled effective as of January 29, 2010.  Also on January 29, 2010, R.H. Donnelley Corporation changed its name to Dex One Corporation.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Barry Lawson Williams</signatureName>
        <signatureDate>2010-02-02</signatureDate>
    </ownerSignature>
</ownershipDocument>

