mx3.bit.org has no NS records.
NS records for this zone are defined at bit.org.
NS records for this zone are defined at bit.org.
Question and response
Question
dig mx3.bit.org. NS
Answer
The response has no answer records.
Authority
bit.org. 28800 SOA ns1.rrpproxy.net. tech.rrpproxy.net. 2025105744 10800 3600 604800 28800
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0