Probably the easiest way to do this is through the use of the Net::hostent module. eg.

use Net::hostent;
use strict;

my $host = gethost("209.214.174.80");
print $host->name, "\n";

[download]

Remember though that domain resolution is only as good as the domain system - Some IP addresses may not have been set up with PTR records back to fully-qualified domain names.

Update #1 - Another excellent solution might be to use Net::Domain which provides methods not only for IP address resolution, but also hostname and hostdomain for system hostname and domain respectively.

Update #2 - Ugh, Net::Domain is only good for determining this information about the local machine.

 

perl -e 's&&rob@cowsnet.com.au&&&split/[@.]/&&s&.com.&_&&&print'

In reply to Re: Domain name from ip. by rob_au
in thread Domain name from ip. by blax

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