a-mx.schumann.net has no NS records.
NS records for this zone are defined at schumann.net.
NS records for this zone are defined at schumann.net.
Question and response
Question
dig a-mx.schumann.net. NS
Answer
The response has no answer records.
Authority
schumann.net. 2560 SOA a.myradns.net. support.myracloud.com. 1347714429 16384 2048 1048576 2560
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0