Proxy Checker
Paste one proxy or a whole list. Our checker routes a real connection through each proxy to a public what-is-my-IP service and reports what the other end sees: the exit IP, the city, the 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
Any line carrying a scheme up front (http://, https://, socks4://, socks5://) is checked on that protocol, any line without one on the menu above, and Auto goes HTTP CONNECT, SOCKS5, SOCKS4 in turn. When the port doesn't answer at all, the line is failed straight away instead of waiting through every protocol. Latency is timed across the full round trip through the proxy, connect, tunnel, TLS and one request to the lookup service, so a carrier network will by design show higher than a datacenter.
What a good result looks like
For a mobile line, the ISP needs to be one of AT&T, T-Mobile or Verizon and the city needs to match the metro you ordered; working lines on a US carrier are marked "Working · mobile". Run the list twice on a held sticky session and the exit IP should come back the same. If it fails on HTTP but works on SOCKS5, set your tool to the SOCKS5 port.
Deeper checks
On the same connection, IPFighter's free tools run fingerprint, bot-detection and leak tests and pair well with this checker:
IP score & lookup ↗ Browser fingerprint ↗ Bot detection ↗ DNS leak test ↗ WebRTC leak test ↗
The username and password are used for the check and are never logged or stored. One run covers up to 200 lines, four at a time, and an address is capped at 200 checks per ten minutes. Private and internal addresses are refused.
Prefer a desktop app? Download the USAProx tester.