You can use the same port for endless WCF services, if you define the endpoint in the right way.
http://wcfservices.com:8101/service1
http://wcfservices.com:8101/service2
I wrote a little tip about how to host miltiple WCF services under the same Windows Service, using the same port for all the WCF services...
You may be interested:
Windows Service to Host Multiple WCF Services[
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