ns1.wa-data.com has one IP number , but the reverse is ns1.axbyte.com. ns1.axbyte.com point to the same IP. vs.se, ssn.se, 2-2.se, obi.se, khk.nu and at least 100 other hosts use this as a nameserver. wa-data.com is delegated to two nameservers, however two extra nameservers are listed in the zone. All nameservers are at wa-data.com themselves. All of them are on the same IP network. Incoming mail for wa-data.com is handled by two mailservers at axbyte.com. They are on the same IP network. wa-data.com has one IP number. ns1.wa-data.com is hosted on a server in Sweden.