ns2.dsl.vodafone.it has no NS records.
NS records for this zone are defined at dsl.vodafone.it.
NS records for this zone are defined at dsl.vodafone.it.
Question and response
Question
dig ns2.dsl.vodafone.it. NS
Answer
The response has no answer records.
Authority
dsl.vodafone.it. 900 SOA fmifednsgrid.dsl.vodafone.it. hostmaster.vodafone.it. 2522 10800 3600 2592000 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0