_spf.mexline.com has no NS records.
NS records for this zone are defined at mexline.com.
NS records for this zone are defined at mexline.com.
Question and response
Question
dig _spf.mexline.com. NS
Answer
The response has no answer records.
Authority
mexline.com. 600 SOA ns02.mexline.com. netmin.mexline.com. 2026022501 3600 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0