http://buildasite.us

"$ORIGIN 2.0.192.in-addr.arpa.
@ IN SOA my-ns.my.domain. hostmaster.my.domain. (...)
; ...
1 CNAME 1.A.domain.
2 CNAME 2.A.domain.
; ...
129 CNAME 129.B.domain.
130 CNAME 130.B.domain.
;"

'via Blog this'