c-68-40-52-131.hsd1.mi.comcast.net has no NS records.
NS records for this zone are defined at hsd1.mi.comcast.net.
NS records for this zone are defined at hsd1.mi.comcast.net.
Question and response
Question
dig c-68-40-52-131.hsd1.mi.comcast.net. NS
Answer
The response has no answer records.
Authority
hsd1.mi.comcast.net. 900 SOA dns101.comcast.net. dnsadmin.comcast.net. 16328116 7200 3600 604800 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0