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

Results formobile.www.com.co

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2022-02-22T04:55:24.46	2022-02-22T00:00:00	2022-05-23T23:59:59	mobile.www.com.co	mobile.www.com.co	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2022-02-22T04:55:23.186	2022-02-22T00:00:00	2022-05-23T23:59:59	mobile.www.com.co	mobile.www.com.co	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2021-11-27T14:30:23.025	2021-11-27T00:00:00	2022-02-25T23:59:59	mobile.www.com.co	mobile.www.com.co	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2021-11-27T14:30:22.089	2021-11-27T00:00:00	2022-02-25T23:59:59	mobile.www.com.co	mobile.www.com.co	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2021-09-02T03:10:20.024	2021-09-02T00:00:00	2021-12-01T23:59:59	mobile.www.com.co	mobile.www.com.co	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2021-09-02T03:10:18.917	2021-09-02T00:00:00	2021-12-01T23:59:59	mobile.www.com.co	mobile.www.com.co	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA