Proxy Checker
Paste one proxy or a whole list. Each line gets a real connection through the proxy to a public what-is-my-IP service, and you see what the other end sees: the exit IP, city, ISP and ASN, plus how long the trip there and back took. Then export the ones that work.
| # | Proxy | Status | Protocol | Latency | Exit IP | Location | ISP / ASN |
|---|
How the check works
Put http://, https://, socks4:// or socks5:// at the front of a line and that line uses that protocol; if you don't, the menu above picks, and Auto tries HTTP CONNECT, then SOCKS5, then SOCKS4. If the port doesn't answer at all, the line fails right away so you're not waiting on every protocol. Latency counts the whole trip through the proxy: connect, tunnel, TLS and one request to the lookup service, so expect a carrier network to read higher than a datacenter, and that's by design.
What a good result looks like
On a mobile line, look for AT&T, T-Mobile or Verizon as the ISP and the same city as the metro you bought; working lines on a US carrier say "Working · mobile". Keep a sticky session going, run the list twice, and the exit IP should stay put. HTTP not working but SOCKS5 is? Your tool just needs the SOCKS5 port.
Deeper checks
IPFighter's free tools go well with this checker if you want fingerprint, bot-detection and leak tests on the same connection:
IP score & lookup ↗ Browser fingerprint ↗ Bot detection ↗ DNS leak test ↗ WebRTC leak test ↗
We need your credentials to run the check, and we never log or store them. You can check up to 200 lines per run, four at a time, and do up to 200 checks per address every ten minutes. Private and internal addresses are refused.
Prefer a desktop app? Download the USA 4G Proxies tester.