<SUBMISSION>
<ACCESSION-NUMBER>0000904454-06-000689
<TYPE>3
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20061026
<FILING-DATE>20061102
<DATE-OF-FILING-DATE-CHANGE>20061102
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>A21 INC
<CIK>0001074436
<ASSIGNED-SIC>7389
<IRS-NUMBER>742896910
<STATE-OF-INCORPORATION>TX
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>A21, INC.
<STREET2>7660 CENTURION PARKWAY
<CITY>JACKSONVILLE
<STATE>FL
<ZIP>32256
<PHONE>9045650066
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>7660 CENTURION PARKWAY
<CITY>JACKSONVILLE
<STATE>FL
<ZIP>32256
</MAIL-ADDRESS>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>StarVest Management Inc.
<CIK>0001378141
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>000-51285
<FILM-NUMBER>061183526
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>750 LEXINGTON AVENUE, 15TH FLOOR
<CITY>NEW YORK
<STATE>NY
<ZIP>10022
<PHONE>212-863-2580
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>750 LEXINGTON AVENUE, 15TH FLOOR
<CITY>NEW YORK
<STATE>NY
<ZIP>10022
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2006-10-26</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001074436</issuerCik>
        <issuerName>A21 INC</issuerName>
        <issuerTradingSymbol>ATWO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001378141</rptOwnerCik>
            <rptOwnerName>StarVest Management Inc.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>750 LEXINGTON AVENUE, 15TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>84727</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Deborah A. Farrington, President</signatureName>
        <signatureDate>2006-11-02</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
