Proxy Checker
Paste one proxy or a whole list. Our checker takes each line, opens a real connection through that proxy to a public what-is-my-IP service, and reports what that service sees: exit IP, city, ISP, 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
Start a line with a scheme (http://, https://, socks4://, socks5://) and that line uses that protocol; without one, the menu above picks, and Auto tries HTTP CONNECT first, then SOCKS5, then SOCKS4. When nothing at all answers on the port, the line fails right away rather than waiting on each protocol. The latency figure covers the whole round trip through the proxy, connect, tunnel, TLS and one request to the lookup service, so a carrier network reads higher than a datacenter by design.
What a good result looks like
On a mobile line, expect AT&T, T-Mobile or Verizon as the ISP and a city that matches the metro you bought; any working line on a US carrier gets the "Working · mobile" mark. Hold a sticky session and run the list twice, and you should see the same exit IP both times. When HTTP fails and SOCKS5 works, your tool just needs the SOCKS5 port.
Deeper checks
IPFighter's free tools pair well with this checker for fingerprint, bot-detection and leak tests on the same connection:
IP score & lookup ↗ Browser fingerprint ↗ Bot detection ↗ DNS leak test ↗ WebRTC leak test ↗
We use your credentials for the check and never log or store them. Each run takes up to 200 lines, checked four at a time, with a cap of 200 checks per address every ten minutes. Private and internal addresses are refused.