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

Results forwebdisk.moreelastic.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2018-02-16T23:10:20.43	2018-02-12T00:00:00	2018-05-13T23:59:59	moreelastic.com	webdisk.moreelastic.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2017-12-10T22:26:36.988	2017-11-28T00:00:00	2018-02-26T23:59:59	moreelastic.com	webdisk.moreelastic.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2017-11-09T20:04:51.912	2017-11-03T00:00:00	2018-02-01T23:59:59	moreelastic.com	webdisk.moreelastic.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"