Free online ping test with real IPv4 and IPv6 (ICMPv6) echo from our London probe, reporting per-attempt round-trip time, TTL/hop limit, average, min, max, and packet loss. Set the packet size, interval, TTL, and DSCP, test the Don't-Fragment bit, or discover the path MTU. Use it to verify a service is responsive and measure baseline latency. If a host filters ICMP, 100% loss does not necessarily mean it is down.
