133.130-156.35.31.81.in-addr.arpa has no NS records.
NS records for this zone are defined at 130-156.35.31.81.in-addr.arpa.
NS records for this zone are defined at 130-156.35.31.81.in-addr.arpa.
Question and response
Question
dig 133.130-156.35.31.81.in-addr.arpa. NS
Answer
The response has no answer records.
Authority
130-156.35.31.81.in-addr.arpa. 1799 SOA ns1.tele3.cz. root.tele3.cz. 1772606995 28800 7200 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0