gitlab.titanhq.com has no NS records.
NS records for this zone are defined at titanhq.com.
NS records for this zone are defined at titanhq.com.
Question and response
Question
dig gitlab.titanhq.com. NS
Answer
The response has no answer records.
Authority
titanhq.com. 900 SOA ns-402.awsdns-50.com. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0