mail9.usbank.com has no NS records.
NS records for this zone are defined at usbank.com.
NS records for this zone are defined at usbank.com.
Question and response
Question
dig mail9.usbank.com. NS
Answer
The response has no answer records.
Authority
usbank.com. 180 SOA ns2.usbank.com. domainadmin.usbank.com. 2026031014 28800 3600 604800 180
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0