mailav0.fmt1.ntfo.org has no NS records.
NS records for this zone are defined at ntfo.org.
NS records for this zone are defined at ntfo.org.
Question and response
Question
dig mailav0.fmt1.ntfo.org. NS
Answer
The response has no answer records.
Authority
fmt1.ntfo.org. 6447 SOA ntfo.org. postmaster.ntfo.org. 2026011700 86400 14400 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0