ns2.vf-portal.com has no NS records.
NS records for this zone are defined at vf-portal.com.
NS records for this zone are defined at vf-portal.com.
Question and response
Question
dig ns2.vf-portal.com. NS
Answer
The response has no answer records.
Authority
vf-portal.com. 3600 SOA ns1.vf-portal.com. hostmaster.visualforma.pt. 2017032326 3600 840 1209600 3600
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0