ns1.nac.net has one IP number , which also has a corresponding reverse pointer. ns2.dragonfly.com point to the same IP. tnr.com, nac.net, mwpc.net, dcjn.net, aiov.com and at least 100 other hosts use this as a nameserver. nac.net is a domain controlled by two nameservers at nac.net themselves. They are on the same IP network. Incoming mail for nac.net is handled by one mailserver also at nac.net. nac.net has one IP number. ns1.nac.net is hosted on a server in United States.