arpaname
Convert IP addresses to reverse DNS ARPA names.
TLDR
Translate an IP address to its corresponding ARPA name
SYNOPSIS
arpaname ipaddress_...
DESCRIPTION
arpaname converts IP addresses (both IPv4 and IPv6) to their corresponding reverse DNS ARPA domain names. These names are used for reverse DNS lookups, which map IP addresses back to hostnames.
For IPv4 addresses, the output is in the in-addr.arpa domain. For IPv6 addresses, the output is in the ip6.arpa domain with each hexadecimal digit reversed and separated by dots.
CAVEATS
This is a simple conversion utility that does not perform DNS queries. It only formats IP addresses into ARPA notation. Use dig or host with the -x flag to perform actual reverse DNS lookups.
HISTORY
arpaname is part of the BIND (Berkeley Internet Name Domain) utilities, the most widely used DNS software. ARPA names follow the format defined in RFC 1035 for IPv4 and RFC 3596 for IPv6.