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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 EAsHCivVG5V8fItBDyffYPvvxdilpGPB8XdtTHkMiwm3sgIgIyFNIri8fTgRkO+u
 XZrb5lmgSfycK/bVNDXRmg==

<SEC-DOCUMENT>0001273515-10-000078.txt : 20101101
<SEC-HEADER>0001273515-10-000078.hdr.sgml : 20101101
<ACCEPTANCE-DATETIME>20101101165020
ACCESSION NUMBER:		0001273515-10-000078
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101027
FILED AS OF DATE:		20101101
DATE AS OF CHANGE:		20101101

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:		101155433

	BUSINESS ADDRESS:	
		STREET 1:		730 FIFTH AVENUE
		STREET 2:		15TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
		BUSINESS PHONE:		2129040321

	MAIL ADDRESS:	
		STREET 1:		730 FIFTH AVENUE
		STREET 2:		15TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
</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>2010-10-27</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>730 FIFTH AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>15TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</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>2010-10-27</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2500000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.7</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6724135</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&quot;s pecuniary interest in the shares. The Reporting Person is a registered investment adviser but has elected to file Form 4 nevertheless.</remarks>

    <ownerSignature>
        <signatureName>/s/ C DIKER</signatureName>
        <signatureDate>2010-11-01</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ M DIKER</signatureName>
        <signatureDate>2010-11-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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