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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0001209191-03-033437.txt : 20031203
<SEC-HEADER>0001209191-03-033437.hdr.sgml : 20031203
<ACCEPTANCE-DATETIME>20031203162454
ACCESSION NUMBER:		0001209191-03-033437
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031202
FILED AS OF DATE:		20031203

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NETSCOUT SYSTEMS INC
		CENTRAL INDEX KEY:			0001078075
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER INTEGRATED SYSTEMS DESIGN [7373]
		IRS NUMBER:				042837575
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		4 TECHNOLOGY PARK DR
		CITY:			WESTFORD
		STATE:			MA
		ZIP:			01886
		BUSINESS PHONE:		9786144000

	MAIL ADDRESS:	
		STREET 1:		4 TECHNOLOGY PARK DRIVE
		CITY:			WESTFORD
		STATE:			MA
		ZIP:			01886

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SCHICIANO KENNETH T
		CENTRAL INDEX KEY:			0001267209

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-26251
		FILM NUMBER:		031035556

	BUSINESS ADDRESS:	
		STREET 1:		125 HIGH ST STE 2500
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
		BUSINESS PHONE:		6175746781

	MAIL ADDRESS:	
		STREET 1:		125 HIGH ST STE 2500
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>b48711ks.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-12-02</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001078075</issuerCik><issuerName>NETSCOUT SYSTEMS INC</issuerName>        <issuerTradingSymbol>NTCT</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001267209</rptOwnerCik><rptOwnerName>SCHICIANO KENNETH T</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>125 HIGH STREET</rptOwnerStreet1><rptOwnerStreet2>SUITE 2500</rptOwnerStreet2><rptOwnerCity>BOSTON</rptOwnerCity><rptOwnerState>MA</rptOwnerState><rptOwnerZipCode>02110</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><
securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-12-02</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>2120</value></transactionShares><transactionPricePerShare><value>8.30</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>97499</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value><footnoteId id="F2" /></directOrIndirectOwnership><natureOfOwnership><value>See Footnote 2</value></natureOfOwnership></ownershipNature></nonDerivativeTransaction><nonDerivativeHolding><securityTitle><value>Common Stock</value></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransac
tion><value>26837</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value><footnoteId id="F3" /></directOrIndirectOwnership><natureOfOwnership><value>See Footnote 3</value></natureOfOwnership></ownershipNature></nonDerivativeHolding><nonDerivativeHolding><securityTitle><value>Common Stock</value></securityTitle><postTransactionAmounts><sharesOwnedFollowingTransaction><value>5613</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeHolding></nonDerivativeTable><derivativeTable><derivativeHolding><securityTitle><value>Director's Option</value></securityTitle><conversionOrExercisePrice><value>5.41</value></conversionOrExercisePrice><exerciseDate><value>2004-10-14</value><footnoteId id="F1" /></exerciseDate><expirationDate><value>2013-10-14</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><va
lue>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>10000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>10000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeHolding></derivativeTable><footnotes><footnote id="F1">10,000 stock options are exercisable on 10/14/04, provided that during such year, the reporting person attends at least 75% of the meetings of any committee of the Board of which the reporting person is a member.  In the event the attendance requirements are not met, the options will not become exercisable until 10/14/06.</footnote><footnote id="F2">The reporting person may be deemed to have an indirect pecuniary interest as a member of TA Investors LLC in 97,499 shares of Common Stock.  The reporting person disclaims beneficial ownership of all such securities, e
xcept to the extent of 14,962 shares of Common Stock as to which he holds a pecuniary interest.  TA Investors LLC sold 325 shares of Common stock on 12/2/03 on behalf of the reporting person.</footnote><footnote id="F3">The reporting person may be deemed to have an indirect pecuniary interest as a partner of High Street Partners L.P. in 26,837 shares of Common Stock.  The reporting person disclaims beneficial ownership of all such securities, except to the extent of 3,354 shares of Common Stock as to which he holds a pecuniary interest. </footnote></footnotes><ownerSignature><signatureName>Kenneth T. Schiciano</signatureName><signatureDate>2003-12-03</signatureDate></ownerSignature><ownerSignature><signatureName>By: Thomas P. Alber, Attorney-in-Fact</signatureName><signatureDate>2003-12-03</signatureDate></ownerSignature></ownershipDocument>

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