ecom.spf.dominos.com has no NS records.
NS records for this zone are defined at dominos.com.
NS records for this zone are defined at dominos.com.
Question and response
Question
dig ecom.spf.dominos.com. NS
Answer
The response has no answer records.
Authority
dominos.com. 900 SOA a1-66.akam.net. dns-admin.dominos.com. 2026030506 10800 3600 604800 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0