mta.glhec.org has no NS records.
NS records for this zone are defined at glhec.org.
NS records for this zone are defined at glhec.org.
Question and response
Question
dig mta.glhec.org. NS
Answer
The response has no answer records.
Authority
glhec.org. 900 SOA ns-1939.awsdns-50.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0