spf-c.codero.com has no NS records.
NS records for this zone are defined at codero.com.
NS records for this zone are defined at codero.com.
Question and response
Question
dig spf-c.codero.com. NS
Answer
The response has no answer records.
Authority
codero.com. 46200 SOA ns1.codero.com. hostmaster.codero.com. 2026021703 14400 3600 1209600 46200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0