NSA1.SRV53.NET has no NS records.
NS records for this zone are defined at SRV53.NET.
NS records for this zone are defined at SRV53.NET.
Question and response
Question
dig NSA1.SRV53.NET. NS
Answer
The response has no answer records.
Authority
srv53.net. 1800 SOA ns1.srv53.net. support.dnshosting.org. 1590167505 1800 600 2419200 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0