Yep,
You can always see whats in the URL scope by cfdumping it like so:
<cfoutput><cfdump var="#URL#"></cfoutput>
on the target page.
You can check to see whats in the URL.sitename variable like so:
<cfoutput>#URL.sitename#</cfoutput>
better still tou can do some checking first to see if the variable exists and isn't empty:
<cfoutput>
<cfif isdefined('URL.sitename') AND #URL.sitename# NEQ "">
#URL.sitename#
</cfif>
</cfoutput>