spf2.bluehost.com has no NS records.
NS records for this zone are defined at bluehost.com.
NS records for this zone are defined at bluehost.com.
Question and response
Question
dig spf2.bluehost.com. NS
Answer
The response has no answer records.
Authority
bluehost.com. 1800 SOA cody.ns.cloudflare.com. dns.cloudflare.com. 2397089966 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0