IP Checker.
Score any IP — or dial through a proxy and score its exit. Datacenter vs residential vs mobile, fraud score, blacklist listings and open proxy ports, in one pass.
IP address
You are browsing from — check it to see what a platform sees when your profile connects.
Overview
About Proxy & IP Checker
The free IP Checker tells you what a platform sees when a connection arrives. Paste an IP — or a proxy in host:port:user:pass form and we will dial through it — and get the connection type (datacenter, residential or mobile), a fraud score, listings across six public abuse blacklists, a probe of the classic open-proxy ports, and a reverse DNS lookup. Run the page inside the browser profile you actually use and it also checks your timezone, locale and WebRTC against the address, which is where most otherwise-clean setups give themselves away.
How it works
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1
Paste an IP or a proxy
Check an address directly, or switch to proxy mode and paste host:port:user:pass — HTTP or SOCKS5.
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2
Read the score
A 0-100 quality score with every signal behind it spelled out: connection type, fraud score, blacklists and open ports.
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3
Check the browser too
The leak panel compares your timezone, locale and WebRTC candidates against the IP, so a mismatched profile shows up before a platform finds it.
Frequently asked questions
What makes an IP good or bad?
Connection type matters most: datacenter ranges are the most heavily scored, residential lines are normal, and mobile carrier addresses are the hardest to hold against you because thousands of real users share them. On top of that, a public abuse history, a VPN or proxy tag from a detection vendor, or reachable open proxy ports all pull the score down.
Can I test a proxy before I use it?
Yes — that is proxy mode. We connect out through the proxy three times, report the exit IP, the median latency and how many requests succeeded, then score that exit address. Three requests is also enough to catch a rotating pool, which will drop a logged-in session.
Are my proxy credentials stored?
No. They are used for the test connection and then discarded — only the host, port and protocol are kept in your run history.
What do the blacklists mean?
They are public spam and abuse lists with an email lineage, so a listing does not mean a social platform blocks the address. It means the IP has a documented abuse history — which is the cheapest way to find out that a proxy you just rented had a previous life.
Why does the timezone check matter?
A profile on a US proxy whose clock still says Europe/Paris is a contradiction any site can read in one line of JavaScript. The leak panel catches that, plus a locale mismatch and any public address leaking through WebRTC.
Is it free?
Yes — no account needed, with a fair-use limit per hour.