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

Results forsxzkdkj.com.w.cdngslb.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-07-25T07:38:24.601	2021-07-25T06:38:24	2021-10-23T06:38:22	qiming.sxzkdkj.com.w.cdngslb.com	qiming.sxzkdkj.com.w.cdngslb.com	C=US, O=Let's Encrypt, CN=R3
2021-07-25T07:38:24.353	2021-07-25T06:38:24	2021-10-23T06:38:22	qiming.sxzkdkj.com.w.cdngslb.com	qiming.sxzkdkj.com.w.cdngslb.com	C=US, O=Let's Encrypt, CN=R3
2021-07-22T07:53:40.179	2021-07-22T06:53:39	2021-10-20T06:53:37	yunmao.sxzkdkj.com.w.cdngslb.com	yunmao.sxzkdkj.com.w.cdngslb.com	C=US, O=Let's Encrypt, CN=R3
2021-07-22T07:53:39.936	2021-07-22T06:53:39	2021-10-20T06:53:37	yunmao.sxzkdkj.com.w.cdngslb.com	yunmao.sxzkdkj.com.w.cdngslb.com	C=US, O=Let's Encrypt, CN=R3
2021-07-22T04:48:25.632	2021-07-22T03:48:25	2021-10-20T03:48:23	api.sxzkdkj.com.w.cdngslb.com	api.sxzkdkj.com.w.cdngslb.com	C=US, O=Let's Encrypt, CN=R3
2021-07-22T04:48:25.407	2021-07-22T03:48:25	2021-10-20T03:48:23	api.sxzkdkj.com.w.cdngslb.com	api.sxzkdkj.com.w.cdngslb.com	C=US, O=Let's Encrypt, CN=R3