spf1.tre.se has no NS records.
NS records for this zone are defined at tre.se.
NS records for this zone are defined at tre.se.
Question and response
Question
dig spf1.tre.se. NS
Answer
The response has no answer records.
Authority
tre.se. 600 SOA ns.hi3gaccess.se. hostmaster.tre.se. 2026030401 14400 3600 604800 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0