49.ry.cz has no NS records.
NS records for this zone are defined at ry.cz.
NS records for this zone are defined at ry.cz.
Question and response
Question
dig 49.ry.cz. NS
Answer
The response has no answer records.
Authority
ry.cz. 1800 SOA ns.gransy.com. root.gransy.com. 2753303420 86400 900 1209600 1800
49.ry.cz. 1800 NSEC 5.ry.cz. A RRSIG NSEC
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0