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

Results forwww.jdf51np0.cloudhub.eu-west-1.dev3.hydra.sophos.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-04-01T00:27:04.432	2021-04-01T00:00:00	2022-04-30T23:59:59	jdf51np0.cloudhub.eu-west-1.dev3.hydra.sophos.com	jdf51np0.cloudhub.eu-west-1.dev3.hydra.sophos.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2020-04-30T00:26:06.903	2020-04-30T00:00:00	2021-05-30T12:00:00	jdf51np0.cloudhub.eu-west-1.dev3.hydra.sophos.com	jdf51np0.cloudhub.eu-west-1.dev3.hydra.sophos.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2019-06-29T06:07:22.144	2019-05-28T00:00:00	2020-06-28T12:00:00	jdf51np0.cloudhub.eu-west-1.dev3.hydra.sophos.com	jdf51np0.cloudhub.eu-west-1.dev3.hydra.sophos.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2019-05-28T20:23:00.034	2019-05-28T00:00:00	2020-06-28T12:00:00	jdf51np0.cloudhub.eu-west-1.dev3.hydra.sophos.com	jdf51np0.cloudhub.eu-west-1.dev3.hydra.sophos.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon