Publishing Question / Subdomains

Hello, I have published a site successfully but now I have another question;

The main domain name is d-coax.com. I also own several other domains that I want to go to the main site if someone should happen to type them in, such as:

dcoax.info
dcoax.biz
dcoax.org

What is the proper way to do this in Webflow? Do I add them as custom domains? If so, then do I need to create a records and cname records for each on in my domain registrar?

Sorry, very new to publishing so any detailed help would be appreciated.

Annette