ns00.drive.ne.jp has one IP number , which also has a corresponding reverse pointer. ns0.drive.ne.jp point to the same IP. ves.bz, jas.st, 4860.jp, e73.net, w39.net and at least 100 other hosts use this as a nameserver. drive.ne.jp is a domain controlled by two nameservers at drive.ne.jp themselves. They are on different IP networks. Incoming mail for drive.ne.jp is handled by one mailserver having a total of two IP numbers. They are on different IP networks. drive.ne.jp has one IP number. ns00.drive.ne.jp is hosted on a server in Japan.