dns2.dts.mg has one IP number , but the reverse is ns1.dts.mg. ns1.dts.mg point to the same IP. wcs.mg, cne.mg, two.mg, gov.mg, bipe.mg and at least 100 other hosts use this as a nameserver. dts.mg is a domain controlled by two nameservers at dts.mg themselves. They are on different IP networks. Incoming mail for dts.mg is handled by two mailservers also at dts.mg. They are on different IP networks. dns2.dts.mg is hosted on a server in Madagascar.