I own the domain releng.team. There are currently a few subdomains:
https://phab.releng.team
https://sal.releng.team
https://time.releng.team
https://dashboard.releng.team
https://runbooks.releng.team
I have a LetsEncrypt wildcard cert for the domain. There are a bunch of apache redirects setup with logs going to /dev/null. I think it'd be nice create a router where anyone on the team could make a new subdomain.