They check the registry whois first. If it exists there, they check the
listed registrar. If it doesn't exist in the registry whois, they then
check their internal database.
Just another reason a registrar should only provide information about
domains they are registrar of record for.
> Domain Name: CLICKIZEN.COM
> Registrar: NETWORK SOLUTIONS, INC.
> Whois Server: whois.networksolutions.com
> Referral URL: www.networksolutions.com
> Name Server: NS1.DOMAINSAREFREE.COM
> Name Server: NS2.DOMAINSAREFREE.COM
> Updated Date: 20-oct-2000
