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Free tool

Proxy Checker

Paste any proxy, ours or someone else's. Our checker opens a real connection through it (HTTP CONNECT first, then SOCKS5) to a public what-is-my-IP service and shows what the other end sees.

Enter a proxy and press Check.

What a good result looks like

For a mobile line the exit IP should belong to AT&T, T-Mobile or Verizon and resolve to the metro you bought. Latency on a carrier network is higher than on a datacenter proxy by design; what matters is that the tunnel opens on the first try and the exit address stays the same across checks while you hold a sticky session. If HTTP fails but SOCKS5 works, your tool just needs the SOCKS5 port instead.

Bulk lists and deeper checks

To check a whole list at once, or to run fingerprint and leak tests on the same connection, use IPFighter's free tools:

Bulk proxy checker ↗ IP score & lookup ↗ Browser fingerprint ↗ DNS leak test ↗ WebRTC leak test ↗

Credentials are used for this one request and are not logged or stored. Up to thirty checks per address per ten minutes. Private and internal addresses are refused.

Need a proxy that passes this test?

Real US carrier SIMs in eight metros, HTTP(S) and SOCKS5 on every line. From $5/day.

View plans Check my IP