How to Linking A Custom Domain/Subdomain To Github Pages

Step 1

Buy a domain (e.g., example.com). I used "godaddy.com / domains.google.com / so more, but you can use any number of domain name registries.

Step 2

In your github.io repository Settings, add the domain you purchased in Step 1 to the “Custom domain box”:

Under "Custom domain", type your custom domain, then click Save. This will create a commit that adds a CNAME file in the root of your publishing source.

Make sure you do Step 2 before Step 3, for security reasons outlined in the Official Github docs.

Step 3

In your DNS Management console, add a CNAME record with the following parameters:

• type = CNAME
• name = www
• value = example.github.io.

Meaning: This tells your DNS to point www.username.com requests towards the site hosted at username.github.io. Set the TTL (time to live) to an hour or less.

Next, in your DNS Management console, add 4 separate A records with the following information:

• type = A
• name = @
• points to (value) = IP

Meaning: “A” records connect your domain name (hosted by your DNS) to the actual IP addresses where your site lives on a server (at Github).

Official References: For most up to date IP Addresses, use GitHub’s official documentation and for setting up CNAME use this documentation.

UPDATE 1: The IP addresses for DNS A record is updated. The new IP addresses are required to use the free HTTPS support for GitHub pages.

UPDATE 2: Some people said this change is not working, it is actually because the DNS update can take upto 48 hours to propagate. So, I guess try hitting your domain next day 

NOTE 1: Even though it’s very obvious, you should replace YOUR-GITHUB-USERNAME and your-domain.com with your personal github username and domain name you are trying to use respectively.

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