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

Results for*.birthdayflags.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2023-01-17T18:08:05.831	2023-01-17T17:08:05	2023-04-17T17:08:04	birthdayflags.com	*.birthdayflags.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T18:08:05.831	2023-01-17T17:08:05	2023-04-17T17:08:04	birthdayflags.com	*.birthdayflags.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T18:08:05.606	2023-01-17T17:08:05	2023-04-17T17:08:04	birthdayflags.com	*.birthdayflags.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T18:08:05.606	2023-01-17T17:08:05	2023-04-17T17:08:04	birthdayflags.com	*.birthdayflags.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:06:25.099	2022-11-18T15:06:24	2023-02-16T15:06:23	birthdayflags.com	*.birthdayflags.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:06:25.099	2022-11-18T15:06:24	2023-02-16T15:06:23	birthdayflags.com	*.birthdayflags.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:06:24.835	2022-11-18T15:06:24	2023-02-16T15:06:23	birthdayflags.com	*.birthdayflags.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T16:06:24.835	2022-11-18T15:06:24	2023-02-16T15:06:23	birthdayflags.com	*.birthdayflags.com	C=US, O=Let's Encrypt, CN=R3