-----BEGIN PRIVACY-ENHANCED MESSAGE-----
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,
 LuIWgfXHrVRuxy8BxsNJhCG6NV9k/baZJUcpHrC3kPYwqJW23oM6lFj2rNUZCS17
 TWlcDapim5v0NPeyTcHdIA==

<SEC-DOCUMENT>0001144204-05-011183.txt : 20050412
<SEC-HEADER>0001144204-05-011183.hdr.sgml : 20050412
<ACCEPTANCE-DATETIME>20050412155434
ACCESSION NUMBER:		0001144204-05-011183
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050412
FILED AS OF DATE:		20050412
DATE AS OF CHANGE:		20050412

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PFENNIGER RICHARD C JR
		CENTRAL INDEX KEY:			0001200796

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-19437
		FILM NUMBER:		05746269

	BUSINESS ADDRESS:	
		STREET 1:		4400 BISCAYNE BOULEVARD
		CITY:			MIAMI
		STATE:			FL
		ZIP:			33137
		BUSINESS PHONE:		305 575 6000

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CELLULAR TECHNICAL SERVICES CO INC
		CENTRAL INDEX KEY:			0000876378
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER INTEGRATED SYSTEMS DESIGN [7373]
		IRS NUMBER:				112962080
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2815 SECOND AVENUE
		STREET 2:		SUITE 100
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98121
		BUSINESS PHONE:		2064436400

	MAIL ADDRESS:	
		STREET 1:		2815 SECOND AVENUE
		STREET 2:		SUITE 100
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98121
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>v016153_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2005-04-12</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000876378</issuerCik>
        <issuerName>CELLULAR TECHNICAL SERVICES CO INC</issuerName>
        <issuerTradingSymbol>CTSC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001200796</rptOwnerCik>
            <rptOwnerName>PFENNIGER RICHARD C JR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CONTINUCARE CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>7200 CORPORATE CENTER DRIVE, SUITE 600</rptOwnerStreet2>
            <rptOwnerCity>MIAMI</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33126</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>100000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>Richard C. Pfenniger, Jr.</signatureName>
        <signatureDate>2005-04-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----