ns1.parked.com has one IP number , which also has a corresponding reverse pointer. rim.es, ee4.org, a39.com, gun.com, vets.ca and at least 100 other hosts use this as a nameserver. parked.com is a domain controlled by two nameservers at parked.com themselves. They are on different IP networks. Incoming mail for parked.com is handled by one mailserver also at parked.com. parked.com has one IP number.