mail.nle1.net has no NS records.
NS records for this zone are defined at nle1.net.
NS records for this zone are defined at nle1.net.
Question and response
Question
dig mail.nle1.net. NS
Answer
The response has no answer records.
Authority
nle1.net. 1800 SOA ns.nle1.net. hostmaster.nleinternet.net. 200708273 3600 250 604800 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0