ns4.us.bank has no NS records.
NS records for this zone are defined at us.bank.
NS records for this zone are defined at us.bank.
Question and response
Question
dig ns4.us.bank. NS
Answer
The response has no answer records.
Authority
us.bank. 1800 SOA ns2.us.bank. domainadmin.usbank.com. 2025072201 28800 3600 604800 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0