Proxy Checker
Paste one proxy or a whole list. Our checker makes a real connection through each proxy line to a public what-is-my-IP service, then shows you what that service sees: exit IP, city, ISP, ASN and round-trip time. Then export the ones that work.
| # | Proxy | Status | Protocol | Latency | Exit IP | Location | ISP / ASN |
|---|
How the check works
To set the protocol for one line, start it with a scheme (http://, https://, socks4://, socks5://); with no scheme the menu above is used, and Auto tries HTTP CONNECT, then SOCKS5, then SOCKS4. A port with no answer at all fails the line at once, with no wait on each protocol. The latency number covers the whole round trip through the proxy (connect, tunnel, TLS, one request to the lookup service), so by design a carrier network shows a higher number than a datacenter.
What a good result looks like
On a mobile SIM, expect AT&T, T-Mobile or Verizon as the ISP and a city that matches the metro you bought; a working SIM on a US carrier gets the mark "Working · mobile". You can check this yourself: hold a sticky session, run the list two times, and the exit IP should not change. When SOCKS5 works and HTTP does not, point your tool at the SOCKS5 port.
Deeper checks
Use IPFighter's free tools next to this checker to test the same connection for leaks, bot detection and fingerprint:
IP score & lookup ↗ Browser fingerprint ↗ Bot detection ↗ DNS leak test ↗ WebRTC leak test ↗
We use your credentials to run the check, and we never store or log them. Per run, up to 200 lines, four at a time; per address, up to 200 checks per ten minutes. Private and internal addresses are refused.
Prefer a desktop app? Download the Real US Proxies tester.