dns.frederickburg.com has no NS records.
NS records for this zone are defined at frederickburg.com.
NS records for this zone are defined at frederickburg.com.
Question and response
Question
dig dns.frederickburg.com. NS
Answer
The response has no answer records.
Authority
frederickburg.com. 3600 SOA dns.frederickburg.com. hostmaster.frederickburg.com. 1756982123 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0