-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 CmxBLIsbJeRB1UY7cs3AyGZFnUyowrOgK+So++3p+3hFgkxmr9B0hfjlYVVFsBP0
 j/qIrchgNGpFHOzd9vWO7Q==

<SEC-DOCUMENT>0000005907-05-000061.txt : 20050204
<SEC-HEADER>0000005907-05-000061.hdr.sgml : 20050204
<ACCEPTANCE-DATETIME>20050204155742
ACCESSION NUMBER:		0000005907-05-000061
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050203
FILED AS OF DATE:		20050204
DATE AS OF CHANGE:		20050204

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HANNIGAN WILLIAM J
		CENTRAL INDEX KEY:			0001185090

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-01105
		FILM NUMBER:		05577250

	BUSINESS ADDRESS:	
		STREET 1:		3150 SABRE DRIVE
		STREET 2:		MD 9105
		CITY:			SOUTHLAKE
		STATE:			TX
		ZIP:			76092

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AT&T CORP
		CENTRAL INDEX KEY:			0000005907
		STANDARD INDUSTRIAL CLASSIFICATION:	TELEPHONE COMMUNICATIONS (NO RADIO TELEPHONE) [4813]
		IRS NUMBER:				134924710
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE AT&T WAY
		CITY:			BEDMINSTER
		STATE:			NJ
		ZIP:			07921
		BUSINESS PHONE:		9082212000

	MAIL ADDRESS:	
		STREET 1:		ONE AT&T WAY
		CITY:			BEDMINSTER
		STATE:			NJ
		ZIP:			07921

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AMERICAN TELEPHONE & TELEGRAPH CO
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>hannigan020305_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-02-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000005907</issuerCik>
        <issuerName>AT&amp;T CORP</issuerName>
        <issuerTradingSymbol>T</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001185090</rptOwnerCik>
            <rptOwnerName>HANNIGAN WILLIAM J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE AT&amp;T WAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BEDMINSTER</rptOwnerCity>
            <rptOwnerState>NJ</rptOwnerState>
            <rptOwnerZipCode>07921</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and COO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Phantom Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-02-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>92100</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>AT&amp;T Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>92100</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>92100</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Convertible into AT&amp;T Common Stock on a one-for-one basis.</footnote>
        <footnote id="F2">Vests 1/2 on 2/3/07, 1/4 each on 2/3/08 and 2/3/09.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/  John W. Thomson, Attorney-in-Fact</signatureName>
        <signatureDate>2005-02-04</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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