Use !ptr-ip6 to perform a reverse DNS (PTR) lookup for an IPv6 address. PTR records map an IPv6 address to a hostname using the ip6.arpa domain. This lookup reveals the domain name associated with an IPv6 address and is commonly used for verification, logging, mail server checks, IPv6 diagnostics, and Internet forensics.

PTR records are published by the organization that owns or manages the IPv6 address space. The authoritative DNS servers responsible for the ip6.arpa zone publish the PTR hostname chosen by the IP holder, or delegate control of the reverse-DNS zone to the organization that owns or manages the IPv6 block. Because of this, reverse DNS often reflects operational or organizational details about the entity controlling the IPv6 address space.

!ptr-ip6 focuses specifically on DNS PTR resolution.
For IPv6 address analysis use !ip6
For IPv6 CIDR block analysis use !cidr6
For IPv6 WHOIS registration data use !whois-ip6
For BGP routing visibility use !bgp-cidr6.

Reverse DNS is also valuable in Internet forensics. PTR hostnames often reveal hosting providers, IPv6 mail server infrastructure, CDN edges, load balancer clusters, and operational fingerprints. Analysts use IPv6 PTR lookups to understand service attribution, detect misconfigurations, and correlate IPv6 addresses with organizational or geographic hints.

Usually, !ptr can be used in place of !ptr-ip6

Usage:
!ptr-ip6 <ipv6-address>

Usage Examples:
!ptr 2a00:1450:4017:800::200e
!ptr 2001:502:4612::10
!ptr 2610:A1:32D1::53
!ptr 2001:4998:1B0::7961:686F:6F21
!ptr 2620:1EC:BDA:700::CC
!ptr 2001:4860:4802:36::15
!ptr 2A00:1450:4001:C21::1B
!ptr-ip6 2a00:1450:4001:c01::67
!ptr-ip6 2001:2345:6789:abcd:ef::


See also:
!help !ptr