Are you trying to a specific application, or are you setting up a new local service on this port?
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3 Answers. Sorted by: 1. Check this list of unassigned ports https://www.iana.org/assignments/service-names-port-numbers/service-n... Information Security Stack Exchange DirectAthletics http localhost 11501
Replace server.js and http://localhost:11501/api/example with your actual file and endpoint. Are you trying to a specific application, or