marto makes a good point about asking the ISP about whether a static or dynamic IP is provided. In the meantime, perhaps something like the following would be helpful:

#!/usr/bin/env perl
use strict;
use warnings;
use LWP::Simple;
use Regexp::Common qw/net/;

my $ip;

for ( 0 .. 9 ) {
    chomp( $ip = get('http://ip-addr.es/') );
    last if defined $ip and $ip =~ /$RE{net}{IPv4}/;
    sleep 1;
}

...

[download]

In reply to Re: Script to Notify of Public IP Change by Kenosis
in thread Script to Notify of Public IP Change by Arkevius

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