o3.sg.metricsthatmatter.com has no NS records.
NS records for this zone are defined at metricsthatmatter.com.
NS records for this zone are defined at metricsthatmatter.com.
Question and response
Question
dig o3.sg.metricsthatmatter.com. NS
Answer
The response has no answer records.
Authority
metricsthatmatter.com. 3600 SOA ns1-03.azure-dns.com. domains.explorance.com. 1 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0