mx03.lexisnexis.com has no NS records.
NS records for this zone are defined at lexisnexis.com.
NS records for this zone are defined at lexisnexis.com.
Question and response
Question
dig mx03.lexisnexis.com. NS
Answer
The response has no answer records.
Authority
lexisnexis.com. 900 SOA spn5061.telecom.regn.net. hostmaster.lexisnexis.com. 9653 3600 900 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0