ns.zengen.com has one IP number , via cname to zengen.com , but the reverse is pmlb04-san.trellian.com. 650.com, supp.cz, bsa.com, aprs.com, i-cf.com and at least 100 other hosts point to the same IP. zengen.com is delegated to two nameservers, however both delegated nameservers are missing in the zone and two other nameservers are listed instead. There are two duplicated IP numbers. Some of them are on the same IP network. zengen.com has two IP numbers. They are on the same IP network. ns.zengen.com is hosted on a server in United States.