I recall having used a DNS "service", where I would type the address I want to be returned within the domain name itself. Example:
192.168.10.9.nit.io would return
192.168.10.9. I just can't remember what's the correct domain for this (say, it is not ".nit.io").
It is especially useful when testing a service that will run later under a DNS name but for which I cannot yet create a real DNS record. Using this service, everything runs as if there were a DNS record.
Thanks for your help.