DNAME (RFC 2672) (please use only for renumbering)
190.189.188.1 reverse 1.188.189.190.in-addr.arpa
$ORIGIN new-style.in-addr.arpa.
189.190 DNAME in-addr.example.net.
$ORIGIN in-addr.example.net.
188 DNAME in-addr.customer.example.
$ORIGIN in-addr.customer.example.
1 PTR www.customer.example.
2 PTR mailhub.customer.example.
Think about DNAME for binary with CIDR