98.158.146.233.static.coresite.com has no NS records.
NS records for this zone are defined at coresite.com.
NS records for this zone are defined at coresite.com.
Question and response
Question
dig 98.158.146.233.static.coresite.com. NS
Answer
The response has no answer records.
Authority
coresite.com. 900 SOA ns-1952.awsdns-52.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0