dns.sullivan-griffith.com has no NS records.
NS records for this zone are defined at sullivan-griffith.com.
NS records for this zone are defined at sullivan-griffith.com.
Question and response
Question
dig dns.sullivan-griffith.com. NS
Answer
The response has no answer records.
Authority
sullivan-griffith.com. 3600 SOA dns.sullivan-griffith.com. hostmaster.sullivan-griffith.com. 1625552448 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0