- http://detectportal.firefox.com/success.txt
- http://ipv6.msftncsi.com/ncsi.txt
- http://nmcheck.gnome.org/check_network_status.txt
- http://network-test.debian.org/nm
- http://ping.archlinux.org/nm-check.txt
- http://cp.cloudflare.com/
- http://connect.rom.miui.com/generate_204
- http://connectivitycheck.platform.hicloud.com/generate_204
- http://www.qualcomm.cn/generate_204
- all Google generate_204
- http://www.msftncsi.com/ncsi.txt
- http://www.msftconnecttest.com/ncsi.txt
- http://www.msftconnecttest.com/connecttest.txt
- http://captive.apple.com/hotspot-detect.html
- http://www.apple.com/library/test/success.html
- http://connectivity-check.ubuntu.com
- https://spectrum.s3.amazonaws.com/kindle-wifi/wifiredirect.html
- https://spectrum.s3.amazonaws.com/kindle-wifi/wifistub.html