Check whether a TCP port is open and reachable from servers worldwide. Test ports like 443, 22, 3389 or 25565 with handshake timing per location.
Check if a TCP port is open by timing the handshake from servers in many countries. It works even where ICMP ping is blocked, so it is the reliable way to test a web, SSH, RDP, mail or game server.
check-host.one lets you check a host from many places at once. Enter a domain, IP address or URL and the check runs on servers around the world, so you can see whether a website or server is down for everyone or just for you, and how fast it answers from each region.
Ping a host over ICMP from several countries and compare round-trip time and packet loss per location.
Check whether a port such as 443, 22 or 25565 is open and reachable, even where ICMP ping is blocked.
Check if a website is up: see the HTTP status code and response time from every server.
Trace the network path to a host hop by hop, and compare DNS answers between regions to check propagation.
Checking a host means testing whether a server, website or IP address is reachable and responding. A check from your own computer only shows your connection; checking from many locations shows whether the problem is the host itself or a single network or region.
Yes. Every check is free and needs no account, and each result gets a permanent link you can share.
Yes. Pick countries or whole continents in the server list and use up to 25 servers per check.
MCP server for AI agents: https://check-host.one/mcp