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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>0001273515-10-000053.txt : 20100324
<SEC-HEADER>0001273515-10-000053.hdr.sgml : 20100324
<ACCEPTANCE-DATETIME>20100324140229
ACCESSION NUMBER:		0001273515-10-000053
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100322
FILED AS OF DATE:		20100324
DATE AS OF CHANGE:		20100324

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TUCOWS INC /PA/
		CENTRAL INDEX KEY:			0000909494
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		IRS NUMBER:				232707366
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		96 MOWAT AVENUE
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M6K 3M1
		BUSINESS PHONE:		4165350123

	MAIL ADDRESS:	
		STREET 1:		96 MOWAT AVENUE
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M6K 3M1

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INFONAUTICS INC
		DATE OF NAME CHANGE:	19960426

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	INFONAUTICS CORP
		DATE OF NAME CHANGE:	19960315

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DIKER MANAGEMENT LLC
		CENTRAL INDEX KEY:			0001276525
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32600
		FILM NUMBER:		10701381

	BUSINESS ADDRESS:	
		STREET 1:		745 FIFTH AVENUE
		STREET 2:		SUITE 1409
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10151
		BUSINESS PHONE:		2129040321

	MAIL ADDRESS:	
		STREET 1:		745 FIFTH AVENUE
		STREET 2:		SUITE 1409
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10151
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-03-22</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000909494</issuerCik>
        <issuerName>TUCOWS INC /PA/</issuerName>
        <issuerTradingSymbol>tcx</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001276525</rptOwnerCik>
            <rptOwnerName>DIKER MANAGEMENT LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>745 FIFTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1409</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10151</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-03-22</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4200</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.8388</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9232735</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See remarks</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-03-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>8600</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.8401</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9224135</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See remarks</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <remarks>The shares of Common Stock to which this line refers are held indirectly by Diker Management, LLC (the &quot;Reporting Person&quot;), in its capacity as the registered investment adviser of certain managed accounts and funds. The Reporting Person is a registered investment adviser and as such disclaims all beneficial ownership of these shares and in any case disclaims beneficial ownership of these shares except to the extent of the Reporting Person's pecuniary interest in the shares of Common Stock. The Reporting Person is a registered investment adviser but has elected to file this Form 4 nevertheless.</remarks>

    <ownerSignature>
        <signatureName>/s/ CHARLES DIKER</signatureName>
        <signatureDate>2010-03-24</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ MARK DIKER</signatureName>
        <signatureDate>2010-03-24</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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