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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 ErpjQEJ6DI8NqBMfjFzQ6V+zzoNmNWnhwKinGProB7eeV1iL43qkPV9m9edMmVw3
 91kcxLJZZavaVefVhQVS0w==

<SEC-DOCUMENT>0000005907-05-000075.txt : 20050324
<SEC-HEADER>0000005907-05-000075.hdr.sgml : 20050324
<ACCEPTANCE-DATETIME>20050324140902
ACCESSION NUMBER:		0000005907-05-000075
CONFORMED SUBMISSION TYPE:	3/A
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040518
FILED AS OF DATE:		20050324
DATE AS OF CHANGE:		20050324

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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Reidy Christopher R
		CENTRAL INDEX KEY:			0001290907

	FILING VALUES:
		FORM TYPE:		3/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-01105
		FILM NUMBER:		05701422

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		908-234-6100

	MAIL ADDRESS:	
		STREET 1:		ONE AT&T WAY
		CITY:			BEDMINSTER
		STATE:			NJ
		ZIP:			07921
</SEC-HEADER>
<DOCUMENT>
<TYPE>3/A
<SEQUENCE>1
<FILENAME>reidy031605_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3/A</documentType>

    <periodOfReport>2004-05-18</periodOfReport>

    <dateOfOriginalSubmission>2004-05-27</dateOfOriginalSubmission>

    <noSecuritiesOwned>0</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001290907</rptOwnerCik>
            <rptOwnerName>Reidy Christopher R</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>Vice President and Controller</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Deferred Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>AT&amp;T Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4024.915</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Conversion deferred until retirement or other future dates; reporting person's holdings of deferred stock units were not
previously reported on Form 3 filed May 27, 2004.</footnote>
        <footnote id="F2">Convertible into AT&amp;T Common Stock on a one-for-one basis.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Christopher R. Reidy</signatureName>
        <signatureDate>2005-03-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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