Believe it or not you answered your own question.
There are three services:
3. Hosting (whether it be email, web, jabber, etc)
And at DH #2 and #3 are a packaged deal. Well you could setup a subdomain CNAME and then redirect the domain to the subdomain. Or sign up with an outfit that offers DNS-only service and point the domain to use their nameservers.
Customer since 2000 openvein.org