infoblox1.sr.net has one IP number , but the reverse is ns1.sr.net. ns1.sr.net point to the same IP. sr.net is a domain controlled by two nameservers at sr.net themselves. They are on the same IP network. Incoming mail for sr.net is handled by one mailserver also at sr.net. sr.net has one IP number. infoblox1.sr.net is hosted on a server in Suriname.