spfip.emtelco.com.co has no NS records.
NS records for this zone are defined at emtelco.com.co.
NS records for this zone are defined at emtelco.com.co.
Question and response
Question
dig spfip.emtelco.com.co. NS
Answer
The response has no answer records.
Authority
emtelco.com.co. 1800 SOA jason.ns.cloudflare.com. dns.cloudflare.com. 2398716367 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0