csgsystems.com CNAME DNS records

CNAME Canonical name

Apex domains cannot have CNAME records.

Question and response

Question

dig csgsystems.com. NS

Answer

csgsystems.com. 5 NS ns2.csgsystems.com. csgsystems.com. 5 NS ns12.csgsystems.com. csgsystems.com. 5 NS ns1.csgsystems.com. csgsystems.com. 5 NS ns11.csgsystems.com.

Authority

The response has no authority records.

Additional

ns1.csgsystems.com. 5 A 205.144.147.21 ns2.csgsystems.com. 5 A 205.144.147.22 ns11.csgsystems.com. 5 A 205.144.157.21 ns12.csgsystems.com. 5 A 205.144.157.22 . 0 OPT ; payload 1232, xrcode 0, version 0, flags 0