ns2.nn.ru has one IP number , but the reverse is sigma.nn.ru. solan.ru, admnn.ru, akbnn.ru, pcfko.ru, nipom.ru and at least 64 other hosts point to the same IP. hnn.ru, ruiz.ru, a-de.ru, anec.ru, porn.ru and at least 42 other hosts use this as a nameserver. nn.ru is a domain controlled by two nameservers at nn.ru themselves. They are on the same IP network. Incoming mail for nn.ru is handled by two mailservers also at nn.ru. Two mailservers have the same IP number. nn.ru has one IP number. ns2.nn.ru is hosted on a server in Russian Federation.