spf.grapesc.cz has no NS records.
NS records for this zone are defined at grapesc.cz.
NS records for this zone are defined at grapesc.cz.
Question and response
Question
dig spf.grapesc.cz. NS
Answer
The response has no answer records.
Authority
grapesc.cz. 600 SOA ns1.grapesc.cz. domeny.grapesc.cz. 2025535239 10800 7200 1209600 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0