spf.teol.net has no NS records.
NS records for this zone are defined at teol.net.
NS records for this zone are defined at teol.net.
Question and response
Question
dig spf.teol.net. NS
Answer
The response has no answer records.
Authority
teol.net. 300 SOA ns1.teol.net. hostmaster.teol.net. 2026022601 21600 3600 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0