estx.mir3.com has no NS records.
NS records for this zone are defined at mir3.com.
NS records for this zone are defined at mir3.com.
Question and response
Question
dig estx.mir3.com. NS
Answer
The response has no answer records.
Authority
mir3.com. 900 SOA ns-1474.awsdns-56.org. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0