d221-73-92.commercial.cgocable.net has no NS records.
NS records for this zone are defined at commercial.cgocable.net.
NS records for this zone are defined at commercial.cgocable.net.
Question and response
Question
dig d221-73-92.commercial.cgocable.net. NS
Answer
The response has no answer records.
Authority
commercial.cgocable.net. 86400 SOA ns4.cgocable.net. dnsadmin.cgocable.net. 2007228576 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0