Using Command Lines in Terminal can be really be a useful tool.

Walk through this simple exercise, to look up DNS and domains. The command (command line) is under CL command in bold, and is what you copy and paste into your Terminal window.

Sample domain url: https://cantrusthosting.coop/

CL command
whois cantrusthosting.coop

From the results you get:
Domain Name (bought): Registrar URL: http://www.domains.coop/
Domain expires: Registry Expiry Date: 2021-05-29T23:59:59.0Z

DNS info

You get Name servers

Name Server: DNS2.EASYDNS.NET
Name Server: DNS1.EASYDNS.COM
Name Server: DNS3.EASYDNS.CA

Email (where it is hosted)

CL command
host cantrusthosting.coop

From the results you get:
cantrusthosting.coop mail is handled by 1 aspmx.l.google.com. = Google

Website (where it is is hosted)

CL command
host cantrusthosting.coop

From the results you get:
cantrusthosting.coop has address 71.19.255.240

Use the IP to get

CL command
whois 71.19.255.240
OrgName: eSecureData