o1.ptr656.accela.com has no CNAME records.
Question and response
Question
dig o1.ptr656.accela.com. NS
Answer
The response has no answer records.
Authority
accela.com. 1221 SOA ram.ns.cloudflare.com. dns.cloudflare.com. 2397375366 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0