l-sdnproxy.icoremail.net has no NS records.
NS records for this zone are defined at icoremail.net.
NS records for this zone are defined at icoremail.net.
Question and response
Question
dig l-sdnproxy.icoremail.net. NS
Answer
The response has no answer records.
Authority
icoremail.net. 180 SOA ns1.icoremail.net. postmaster.corpease.net. 2179221043 10800 3600 3888000 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0