It can be anything! An apex, subdomain, or even a URL.

Results formx.avrc.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2026-01-25T14:10:57.286	2026-01-25T00:00:00	2026-04-24T23:59:59	a.mx.avrc.com	a.mx.avrc.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G2
2021-05-17T11:41:43.8	2021-05-17T00:00:00	2022-05-17T23:59:59	a.mx.avrc.com	a.mx.avrc.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2021-03-06T22:14:46.562	2021-02-25T00:00:00	2022-02-25T23:59:59	avrc.com	*.avrc.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2021-02-25T16:44:43.108	2021-02-25T00:00:00	2022-02-25T23:59:59	avrc.com	*.avrc.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1