a.ns.computervoice.com has no CNAME records.
Question and response
Question
dig a.ns.computervoice.com. NS
Answer
The response has no answer records.
Authority
computervoice.com. 1765 SOA a.ns.computervoice.com. admins\@computervoice.com. 600 16384 2048 1048576 2560
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0