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

Results forcrawlerdata.com.kaso.dk

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-07-29T18:07:06.913	2020-07-29T17:07:06	2020-10-27T17:07:06	uptimester.com	*.com.kaso.dk	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-07-29T18:07:06.67	2020-07-29T17:07:06	2020-10-27T17:07:06	uptimester.com	*.com.kaso.dk	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-07-29T18:05:19.435	2020-07-29T17:05:18	2020-10-27T17:05:18	www.crawlerdata.com.kaso.dk	www.crawlerdata.com.kaso.dk	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-07-29T18:05:19.435	2020-07-29T17:05:18	2020-10-27T17:05:18	www.crawlerdata.com.kaso.dk	*.com.kaso.dk	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-07-29T18:05:18.741	2020-07-29T17:05:18	2020-10-27T17:05:18	www.crawlerdata.com.kaso.dk	www.crawlerdata.com.kaso.dk	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-07-29T18:05:18.741	2020-07-29T17:05:18	2020-10-27T17:05:18	www.crawlerdata.com.kaso.dk	*.com.kaso.dk	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-07-29T17:49:31.449	2020-07-29T16:49:30	2020-10-27T16:49:30	www.kasotech.com.kaso.dk	*.com.kaso.dk	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-07-29T17:49:30.828	2020-07-29T16:49:30	2020-10-27T16:49:30	www.kasotech.com.kaso.dk	*.com.kaso.dk	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3