About portchecker.me
Who it is for
Free tools for administrators, developers, game server owners and users troubleshooting their own networks. Check only your own systems or systems for which you have explicit permission.
How it works
Our server tests the requested TCP connection and distinguishes accepted, refused and unanswered connections. DNS, certificates and headers help investigate other layers. Results represent one perspective at one time, not a complete audit. Geolocation uses local DB-IP Lite data (CC BY 4.0), without sending the IP to third parties for this lookup.
Operation and contact
The service requires no account and applies limits to prevent abuse. The site uses Google AdSense as a funding model; ad serving depends on Google approval. Send suggestions and corrections through the contact page.