ns2.darl.com has no CNAME records.
Question and response
Question
dig ns2.darl.com. NS
Answer
The response has no answer records.
Authority
darl.com. 2457 SOA ns1.darl.com. ron.darl.com. 2025100600 3600 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0