I was actually here to look for some IPV6 sorting code, but reading various IPV4 sorting solutions made me want to add mine from 10 years ago (when I retired). I've forgotten much, but I remember back then being proud of my fairly simple and fast sort of IP addresses. I may have been deluding myself. I hope not, but I'm prepared if so.

#!/usr/bin/env perl

chomp(@IPs = <DATA>);

@Sorted = map { substr($_, 4) }
    sort map { pack('C*', split(/\./, $_) ) . $_ } @IPs;

print join("\n", @Sorted) . "\n";

__DATA__
12.345.111.3
12.345.111.26
61.8.47.111
12.345.111.24
203.134.35.27
12.345.111.5
12.345.111.4
[download]