Proxy Checker
Paste one proxy or a whole list. Each line means a real connection through that proxy to a public what-is-my-IP service, with the checker reporting what the other end sees: exit IP, city, ISP and ASN, and the round-trip time. Then export the ones that work.
| # | Proxy | Status | Protocol | Latency | Exit IP | Location | ISP / ASN |
|---|
How the check works
A line opening with a scheme (http://, https://, socks4://, socks5://) runs on that protocol; everything else follows the menu above, and Auto tries HTTP CONNECT, SOCKS5, then SOCKS4. If the port is dead quiet, the line fails right then and doesn't sit waiting on every protocol. Latency is the whole trip through the proxy and back, connect, tunnel, TLS and one lookup-service request, so by design a carrier network reads above a datacenter.
What a good result looks like
Expect a mobile line to read AT&T, T-Mobile or Verizon under ISP and your purchased metro under city; working lines on a US carrier are marked "Working · mobile". Run the list again inside the same sticky session and the exit IP should be the same as before. If HTTP fails and SOCKS5 doesn't, your tool simply wants the SOCKS5 port.
Deeper checks
Run fingerprint, bot-detection and leak tests on the same connection with IPFighter's free tools, which pair well with this checker:
IP score & lookup ↗ Browser fingerprint ↗ Bot detection ↗ DNS leak test ↗ WebRTC leak test ↗
Credentials do their job in the check and are never logged or stored. Runs max out at 200 lines, four at a time, and addresses at 200 checks per ten minutes. Private and internal addresses are refused.