subnet0-29.ptd.net has no CNAME records.
Question and response
Question
dig subnet0-29.ptd.net. NS
Answer
The response has no answer records.
Authority
ptd.net. 10800 SOA dns1.ptd.net. etoybrg.corp.ptd.net. 2025062501 10800 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0