mta136.email.houstonchronicle.us.com has no NS records.
NS records for this zone are defined at us.com.
NS records for this zone are defined at us.com.
Question and response
Question
dig mta136.email.houstonchronicle.us.com. NS
Answer
The response has no answer records.
Authority
us.com. 3600 SOA ns0.centralnic.net. hostmaster.centralnic.net. 3000737715 900 1800 6048000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0