Reverse DNS / PTR

Turn a CIDR into its in-addr.arpa reverse zone plus a paste-ready BIND zone skeleton. Octet-aligned prefixes get a clean zone; everything else gets the RFC 2317 classless delegation pattern.

network (CIDR)

Zone

10.168.192.in-addr.arpa

Type

standard

// BIND zone

$ORIGIN 10.168.192.in-addr.arpa.
; reverse zone for 192.168.10.0/24
1	IN PTR	host-1.example.com.
2	IN PTR	host-2.example.com.
3	IN PTR	host-3.example.com.
4	IN PTR	host-4.example.com.