jazztel.com CNAME records

CNAME Canonical name
Apex domains cannot have CNAME records.

Question and response

Question

dig jazztel.com. NS

Answer

jazztel.com. 5 NS dns2.jazztel.es. jazztel.com. 5 NS dns.jazztel.es.

Authority

The response has no authority records.

Additional

dns.jazztel.es. 5 A 212.106.192.250 dns2.jazztel.es. 5 A 87.216.7.2 . 0 OPT ; payload 1232, xrcode 0, version 0, flags 0