infomail.es CNAME records

CNAME Canonical name
Apex domains cannot have CNAME records.

Question and response

Question

dig infomail.es. NS

Answer

infomail.es. 5 NS esifw1.tsai.es. infomail.es. 5 NS esifw2.tsai.es.

Authority

The response has no authority records.

Additional

esifw1.tsai.es. 5 A 213.0.43.37 esifw2.tsai.es. 5 A 213.4.194.5 . 0 OPT ; payload 1232, xrcode 0, version 0, flags 0