If you're dealing with IPv6 addresses check out the Net::IP module for bringing them to the canonical form and other operations. 

$ perl -l
use Net::IP;
my $ip = new Net::IP("FD02:3539:700B:1::FE");
print $ip->ip();
^D
fd02:3539:700b:0001:0000:0000:0000:00fe

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In reply to Re: Regular Expressions for IPv6 Addresses by calin
in thread Regular Expressions for IPv6 Addresses by admiralfreezbee

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