Incoming mail for relay.spb.su is handled by one mailserver having a total of three IP numbers. All of them are on different IP networks. relay.spb.su has three IP numbers. All of them are on different IP networks. relay.spb.ru and flc.customer.relcom.ru point to the same IP. spb.ru, bdco.ru, rivs.ru, snake.ru, sindi.ru and at least 59 other hosts use this as a mailserver. spb.ru, bdco.ru, rivs.ru, snake.ru, sindi.ru and at least 58 other hosts share mailservers with this domain. spb.su is a domain controlled by three nameservers. Two of them are on the same IP network. relay.spb.su is hosted on three servers in Russian Federation.