auth1.america.net has no CNAME records.
Question and response
Question
dig auth1.america.net. NS
Answer
The response has no answer records.
Authority
america.net. 3466 SOA auth1.america.net. dns.america.net. 2026021700 3600 600 864000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0