in reply to www.perlmonks.org vs. perlmonks.org
$ nslookup perlmonks.org
Server: XXXX
Address: XXXX
Non-authoritative answer:
Name: perlmonks.org
Addresses: 209.197.123.153, 66.39.54.27
$ nslookup www.perlmonks.org
Server: XXXX
Address: XXXX
Non-authoritative answer:
Name: perlmonks.org
Addresses: 66.39.54.27, 209.197.123.153
Aliases: www.perlmonks.org