mta112.renweb.com has no NS records.
NS records for this zone are defined at renweb.com.
NS records for this zone are defined at renweb.com.
Question and response
Question
dig mta112.renweb.com. NS
Answer
The response has no answer records.
Authority
renweb.com. 900 SOA ns-931.awsdns-52.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0