IP Quail
I’ve long been a fan of IP Chicken, however it isn’t anycasted, and it doesn’t support IPv6. I’ve had a non-anycasted IPv4/IPv6 capable version called ipfowl which I run at http://ip.henchman21.net/
Enter my new creation: IP Quail
I set out to create my own service which I could host at HenchCDN, a local CDN which aims to anycast content via several internet exchanges to be nearer to end users. I purchased ipquail.com and set it up on my two HenchCDN nodes, and after several revisions, I had a web service up and running.
Instead of using PHP, since it only needs to display the REMOTE_ADDR, I changed to using simple SSI. This ensures much higher performance. I’m using Bootstrap for simplicity, cross platform responsiveness, and to grid and style the page elements.