mpls-relay-01.inet.qwest.net has no NS records.
NS records for this zone are defined at inet.qwest.net.
NS records for this zone are defined at inet.qwest.net.
Question and response
Question
dig mpls-relay-01.inet.qwest.net. NS
Answer
The response has no answer records.
Authority
inet.qwest.net. 300 SOA authns2.qwest.net. abuse.centurylinkservices.net. 2260318000 3600 1800 1728001 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0