Namecheap > Github pages

Pointing your domains to a gh-pages branch requires three steps.

1. Add the Github IPs as A records on Namecheap. Both Github IPs are 192.30.252.153 and 192.30.252.154.
2. Add your Github domain as the CNAME alias on Namecheap. your_username.github.io. (mind the extra period!)
3. Add a CNAME with your new domain name in your repository. lowercase and nothing else