mail.blockbluemedia.com has no NS records.
NS records for this zone are defined at blockbluemedia.com.
NS records for this zone are defined at blockbluemedia.com.
Question and response
Question
dig mail.blockbluemedia.com. NS
Answer
The response has no answer records.
Authority
blockbluemedia.com. 1800 SOA carl.ns.cloudflare.com. dns.cloudflare.com. 2397742500 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0