_spf.questback.net has no NS records.
NS records for this zone are defined at questback.net.
NS records for this zone are defined at questback.net.
Question and response
Question
dig _spf.questback.net. NS
Answer
The response has no answer records.
Authority
questback.net. 3600 SOA ns1.dnshost.net. zonemaster.dnshost.net. 1705568482 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0