Proxy Checker
Paste one proxy or a whole list. The checker makes a real connection through each proxy to a public what-is-my-IP service and shows what the other end sees: the exit IP, city, ISP and ASN, and the time for the round trip. Then export the ones that work.
| # | Proxy | Status | Protocol | Latency | Exit IP | Location | ISP / ASN |
|---|
How the check works
To set the protocol for a single line, start it with http://, https://, socks4:// or socks5://; otherwise the menu above is used, and Auto tries HTTP CONNECT, then SOCKS5, then SOCKS4. If you get no answer on the port at all, the line fails immediately and does not wait for every protocol. The latency number includes the full round trip through the proxy, which is connect, tunnel, TLS and one request to the lookup service, so a carrier network will read higher than a datacenter by design.
What a good result looks like
When you test a mobile line, the ISP should be AT&T, T-Mobile or Verizon and the city should match the metro you bought; working lines on US carriers are labeled "Working · mobile". To check a sticky session, run the list twice while holding it; the exit IP should stay the same. In case HTTP fails and SOCKS5 works, set up your tool with the SOCKS5 port.
Deeper checks
This checker works well with IPFighter's free tools, which test fingerprint, bot detection and leaks on the same connection:
IP score & lookup ↗ Browser fingerprint ↗ Bot detection ↗ DNS leak test ↗ WebRTC leak test ↗
To check the proxy we use its credentials, which are never logged or stored. The checker takes up to 200 lines per run, four at a time, with a limit of 200 checks per address per ten minutes. Private and internal addresses are refused.