lcec-mail2.lrn.com has no NS records.
NS records for this zone are defined at lrn.com.
NS records for this zone are defined at lrn.com.
Question and response
Question
dig lcec-mail2.lrn.com. NS
Answer
The response has no answer records.
Authority
lrn.com. 300 SOA udns1.ultradns.net. hostmaster.lrn.com. 2017131626 86400 7200 3600000 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0