dns2.grazkom.at has no NS records.
NS records for this zone are defined at grazkom.at.
NS records for this zone are defined at grazkom.at.
Question and response
Question
dig dns2.grazkom.at. NS
Answer
The response has no answer records.
Authority
grazkom.at. 3600 SOA ns1.grazkom.at. hostmaster.grazkom.at. 2008082700 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0