ns1.internal.ru has one IP number , which also has a corresponding reverse pointer. 003.ru, 247.ru, 724.ru, iwc.ru, m3x.ru and at least 100 other hosts use this as a nameserver. internal.ru is a domain controlled by three nameservers at internal.ru themselves. Two of them are on the same IP network. Incoming mail for internal.ru is handled by one mailserver at ehouse.ru. ns1.internal.ru is hosted on a server in Russian Federation.