spfb.disney.com has no NS records.
NS records for this zone are defined at disney.com.
NS records for this zone are defined at disney.com.
Question and response
Question
dig spfb.disney.com. NS
Answer
The response has no answer records.
Authority
disney.com. 1800 SOA aa-eorcrp-dscsgm4-ns.disney.com. corp\.dns\.domains.disney.com. 2021046198 10800 3600 2419200 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0