dns4.rr.com has one IP number , which also has a corresponding reverse pointer. ns4.rr.com cnames to this hostname. dns4-rr-com.lawrence.edu point to the same IP. ped.bz, afi.org, kcpd.org, tami.com, ltss.edu and at least 100 other hosts use this as a nameserver. rr.com is a domain controlled by five nameservers at rr.com themselves. Some of them are on the same IP network. Incoming mail for rr.com is handled by two mailservers at mail.rr.com. They are on different IP networks. rr.com has one IP number. dns4.rr.com is hosted on a server in United States.