gw-550.deteque.com has no NS records.
NS records for this zone are defined at deteque.com.
NS records for this zone are defined at deteque.com.
Question and response
Question
dig gw-550.deteque.com. NS
Answer
The response has no answer records.
Authority
deteque.com. 60 SOA auth1.deteque.com. dnsadmin.deteque.com. 1773352378 3600 900 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0