go
nsc2.ufrgs.br has one IP number , which also has a corresponding reverse pointer. 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. nsc2.ufrgs.br is hosted on a server in Brazil.

nsc2.ufrgs.br
a records
 
+ 143.54.1.53 143.54.0.0/16 AS19200 -
+ --- -

ufrgs.br
a records
 
+ 143.54.1.9 143.54.0.0/16 AS19200  
+ ---  
ns-soa records
ns1.ufrgs.br
+ 143.54.1.58 143.54.0.0/16 AS19200 -
+ --- -
ns records
ns1.ufrgs.br
+ 143.54.1.58 143.54.0.0/16 AS19200 -
+ --- -
ns2.ufrgs.br
+ 143.54.1.59 143.54.0.0/16 AS19200 -
dns.pop-rs.rnp.br
+ 200.132.0.67 200.132.0.0/16 AS2716 polvo.pop-rs.rnp.br
+ --- polvo.pop-rs.rnp.br
mx records
mail.ufrgs.br
+ 143.54.1.50 143.54.0.0/16 AS19200 -
+ --- -
ip numbers of host
143.54.1.53
ptrs of ip numbers
nsc2.ufrgs.br
ip numbers using ptr to this host
143.54.1.53