n3.gridway.net has no NS records.
NS records for this zone are defined at gridway.net.
NS records for this zone are defined at gridway.net.
Question and response
Question
dig n3.gridway.net. NS
Answer
The response has no answer records.
Authority
gridway.net. 300 SOA ns1-37.azure-dns.com. azuredns-hostmaster.microsoft.com. 1 3600 300 2419200 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0