Absolutamente bem - com uma criticamente importante ressalva: Você DEVE usar nomes curtos para seus registros.
foo IN A 127.0.0.1 ; <-- This is fine.
bar IN CNAME foo ; <-- This is fine.
baz IN CNAME foo.correctdomain.com ; <-- That's fine too.
@ IN A 127.0.0.2 ; <-- use @ for the base domain
; so it works everywhere
mas
quux.correctdomain.com. IN A 127.0.0.1 ; <-- This will make BIND cry.
; (because it's a bad name in
; synonymdomain.com's zone file)