tieinterceptor1b.corp1.discourse.cloud has no CNAME records.
Question and response
Question
dig tieinterceptor1b.corp1.discourse.cloud. NS
Answer
The response has no answer records.
Authority
corp1.discourse.cloud. 2393 SOA ns1.discourse.cloud. hostmaster.discourse.org. 1772567090 16384 2048 1048576 2560
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0