s3.okhosting.com has no NS records.
NS records for this zone are defined at okhosting.com.
NS records for this zone are defined at okhosting.com.
Question and response
Question
dig s3.us-west-1.wasabisys.com. NS
Answer
s3.us-west-1.wasabisys.com. 120 CNAME us-west-1.wasabisys.com.
Authority
wasabisys.com. 120 SOA dns1.p05.nsone.net. hostmaster.nsone.net. 1648143809 14400 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0