ns1.pairnic.com has one IP number , which also has a corresponding reverse pointer. jjg.net, rlt.com, orpho.us, loguk.com, schak.com and at least 100 other hosts use this as a nameserver. pairnic.com is a domain controlled by two nameservers at ns0.com. They are on different IP networks. Incoming mail for pairnic.com is handled by four mailservers at pair.com. All of them are on the same IP network. pairnic.com has one IP number. ns1.pairnic.com is hosted on a server in United States.