_spf2.mi.com.co has no NS records.
NS records for this zone are defined at mi.com.co.
NS records for this zone are defined at mi.com.co.
Question and response
Question
dig _spf2.mi.com.co. NS
Answer
The response has no answer records.
Authority
mi.com.co. 1800 SOA quincy.ns.cloudflare.com. dns.cloudflare.com. 2397393339 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0