Multi-level wildcard DNS matched by *.domain.com?
Solution 1:
Q1: yes. *.domain.com will match any domain above domain.com ex: a.domain.com a.a.domain.com a.a.a.domain.com etc.
Q2: This should work
If you want global pool of IP's
*.domain.com IN A 1.1.1.1
*.domain.com IN A 2.2.2.2
*.domain.com IN A 3.3.3.3
this is ok and will work (tested in djbdns)