ns2.ufrgs.br has one IP number , which also has a corresponding reverse pointer. impa.br, ufrgs.br, obm.org.br, sbc.org.br, bc.ufrgs.br and at least 45 other hosts use this as a nameserver. ufrgs.br is a domain controlled by three nameservers. Two of them are on the same IP network. Incoming mail for ufrgs.br is handled by one mailserver at ufrgs.br themselves. ufrgs.br has one IP number. ns2.ufrgs.br is hosted on a server in Brazil.