ns1.paris-sorbonne.fr has no NS records.
NS records for this zone are defined at paris-sorbonne.fr.
NS records for this zone are defined at paris-sorbonne.fr.
Question and response
Question
dig ns1.paris-sorbonne.fr. NS
Answer
The response has no answer records.
Authority
paris-sorbonne.fr. 600 SOA ns0.sorbonne-universite.fr. hostmaster.paris-sorbonne.fr. 1373299 21600 3600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0