A little tool for checking if an IP is within GitHub's published IP ranges.

Head over to https://is-this-a.github.io/ip/ to try it out.

Paste in an IP address to check if it's in GitHub's published IP ranges.

This tool fetches the data from GitHub's API and uses the power of your computer to tell you if an IP you put in is in those computer-friendly ranges.

This tool is written in plain, modern JavaScript (it uses fetch!) and packaged using the Parcel bundler.

To run it locally, check out a copy, run yarn install and then yarn start, and the site will run on localhost:1234.

Building for release is simple too, make sure you've yarn installed and then run yarn build.

Putting it all together, you can run yarn deploy to build and push the compiled version up to GitHub Pages!