ColdFusion UDF to generate tracking URLs for major shipping companies: UPS, Fedex, U.S. Postal Service, OnTrac, DHL based on shipment tracking URLs at http://verysimple.com/2011/07/06/ups-tracking-url/ (NOTE: You can test this at CFLive.net)

getShippingURL.cfm

<cfscript>
function getShippingURL(shipper, trackingNumber){
    var shipURL = '';
	var trackingURLS = StructNew();
	trackingURLS['UPS'] = 'http://wwwapps.ups.com/WebTracking/track?track=yes&trackNums=';
	trackingURLS['FedEx'] = 'http://www.fedex.com/Tracking?action=track&tracknumbers=';
	trackingURLS['USPS'] = 'https://tools.usps.com/go/TrackConfirmAction_input?qtc_tLabels1=';
	trackingURLS['DHLUS'] = 'http://track.dhl-usa.com/TrackByNbr.asp?ShipmentNumber=';
	trackingURLS['DHLGlobal'] = 'http://webtrack.dhlglobalmail.com/?mobile=&trackingnumber=';
	trackingURLS['OnTrac'] = 'http://www.ontrac.com/trackingres.asp?tracking_number=';
	trackingURLS['ICC'] = 'http://iccworld.com/track.asp?txtawbno=';
	trackingURLS['LaserShip'] = 'http://www.lasership.com/index.php?option=com_tracking&task=redirectTracking&Itemid=101&tracking_number=';
	if (StructKeyExists(trackingURLS, shipper)){
		shipURL = trackingURLS[shipper] & URLEncodedFormat(trim(trackingNumber));
	}
	return shipURL;
}
</cfscript>


<CFOUTPUT>
<CFLOOP LIST="UPS,Fedex,USPS,DHLUS,DHLGlobal,OnTrac,ICC,LaserShip" INDEX="thisShipper">
<CFSET ShipperURL = getShippingURL(thisShipper, "ABC123")>
#thisShipper# = <a href="#ShipperURL#" target="_blank">#ShipperURL#</a><br>
</CFLOOP>
</CFOUTPUT>