ns2.ig.com.br has one IP record. ig.com, aegsp.br, ig.com.br, ij.com.br, ieg.com.br and at least 100 other hosts use this as a nameserver. ig.com.br is a domain controlled by two nameservers at ig.com.br themselves. They are on the same IP network. Incoming mail for ig.com.br is handled by seven mailservers. All of them are on different IP networks. ig.com.br has one IP record.