postal.labs.k.io has no NS records.
NS records for this zone are defined at labs.k.io.
NS records for this zone are defined at labs.k.io.
Question and response
Question
dig postal.labs.k.io. NS
Answer
The response has no answer records.
Authority
labs.k.io. 3600 SOA the-cake-is-a-lie.katapultdns.com. dns-admin.katapult.io. 1773473210 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0