as3.bserv.com has no CNAME records.
Question and response
Question
dig as3.bserv.com. NS
Answer
The response has no answer records.
Authority
bserv.com. 2533 SOA ns1b.bserv.com. root.ns1b.bserv.com. 2025091100 3600 900 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0