mail-u.cloud CNAME records

CNAME Canonical name
Apex domains cannot have CNAME records.

Question and response

Question

dig mail-u.cloud. NS

Answer

mail-u.cloud. 5 NS ns.udag.org. mail-u.cloud. 5 NS ns.udag.de. mail-u.cloud. 5 NS ns.udag.net.

Authority

The response has no authority records.

Additional

ns.udag.de. 5 A 217.160.80.253 ns.udag.de. 5 AAAA 2001:8d8:fe:53:217:160:80:253 . 0 OPT ; payload 1232, xrcode 0, version 0, flags 0