ns2.simplelists.com has no NS records.
NS records for this zone are defined at simplelists.com.
NS records for this zone are defined at simplelists.com.
Question and response
Question
dig ns2.simplelists.com. NS
Answer
The response has no answer records.
Authority
simplelists.com. 3600 SOA ns1.simplelists.com. hostmaster.simplelists.com. 1 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0