FOSS IP/ISP detector

Does anyone know of a good FOSS IP detector? I'm thinking of something like https://www.whatismyisp.com/ or https://whatismyipaddress.com/. Like how https://librespeed.org/ is a good alternative to https://www.speedtest.net/.

Thanks in advance!

EDIT: Thanks for the answers everyone! Looks like we have...

• ident.me
• ifconfig.io
• ifconfig.me
• icanhazip.com
• ipinfo.tw