ns2.cps.com.ar has no NS records.
NS records for this zone are defined at cps.com.ar.
NS records for this zone are defined at cps.com.ar.
Question and response
Question
dig ns2.cps.com.ar. NS
Answer
The response has no answer records.
Authority
cps.com.ar. 43200 SOA ns1.cps.com.ar. hostmaster.cps.com.ar. 2006092982 3600 900 2419200 43200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0