Proxy Checker
Paste one proxy or a whole list. Our checker opens a real connection through each proxy to a public what-is-my-IP service and just reports what the other end sees: the exit IP, city, ISP and ASN, and how long the round trip took. Then export the ones that work.
| # | Proxy | Status | Protocol | Latency | Exit IP | Location | ISP / ASN |
|---|
How the check works
If you start a line with a scheme (http://, https://, socks4://, socks5://), that's the protocol it uses; if you don't, the menu above sets it, and Auto tries HTTP CONNECT, then SOCKS5, then SOCKS4. If there's no answer on the port at all, the line fails right off instead of waiting on every protocol. Latency takes in the full round trip through the proxy, connecting, tunneling, TLS and one request to the lookup service, so a carrier network is going to read higher than a datacenter by design.
What a good result looks like
On a mobile line you want to see AT&T, T-Mobile or Verizon as the ISP and the same city as the metro you bought; working lines on a US carrier are marked "Working · mobile". Hang on to a sticky session, run the list twice, and the exit IP ought to come back the same. If HTTP fails and SOCKS5 works, all your tool needs is the SOCKS5 port.
Deeper checks
IPFighter's free tools and this checker go together well for fingerprint, bot-detection and leak tests on the same connection:
IP score & lookup ↗ Browser fingerprint ↗ Bot detection ↗ DNS leak test ↗ WebRTC leak test ↗
Your credentials are for the check, and they don't get logged or stored, ever. You get up to 200 lines a run, four at a time, and no more than 200 checks per address per ten minutes. Private and internal addresses are refused.