descartes.nic.pr has one IP number , which also has a corresponding reverse pointer. ac.pr, ut.pr, ix.pr, ucb.pr, sky.pr and at least 62 other hosts point to the same IP. pr, us.pr, do.pr, jm.pr, tc.pr and at least 68 other hosts use this as a nameserver. nic.pr is a domain controlled by five nameservers. Some of them are on the same IP network. Incoming mail for nic.pr is handled by one mailserver at nic.pr themselves. nic.pr has one IP number. descartes.nic.pr is hosted on a server in Puerto Rico.