ns30.columbus.co has no NS records.
NS records for this zone are defined at columbus.co.
NS records for this zone are defined at columbus.co.
Question and response
Question
dig ns30.columbus.co. NS
Answer
The response has no answer records.
Authority
columbus.co. 1800 SOA blue.foundationdns.com. dns.cloudflare.com. 2397800777 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0