Test the reachability of any host, domain, or IP address and measure real-time
response latency, packet loss, and connection quality — directly from our servers.
This tool sends TCP connection requests to the target host on port 80 (HTTP) or 443 (HTTPS) from
our servers and measures the round-trip time in milliseconds. It reports per-packet latency,
packet loss percentage, jitter, and assigns an overall quality grade based on your results.
Frequently Asked Questions
This tool measures TCP round-trip time (RTT) — how long it takes our server to open a
TCP connection to port 80 or 443 on your target host and receive a response. This is
slightly different from ICMP ping (used by the command-line ping) but gives
a highly accurate real-world measure of network latency.
A host may appear unreachable if it blocks incoming connections on ports 80 and 443,
has a firewall that drops packets, is behind a VPN, or is simply offline. Some servers
intentionally block pings and port-probing. Try checking with our DNS Lookup or HTTP
Headers tool to confirm the host exists and is responding.
Under 20ms is excellent (typically same-region cloud servers). Under 80ms is good for
most use cases. 80–150ms is acceptable. Over 150ms may cause noticeable lag in
real-time applications such as gaming or video calls. Over 300ms is considered high
and may indicate routing issues or geographic distance.
Jitter is the variation in latency between successive packets. Low jitter (under 10ms)
means a stable, consistent connection. High jitter causes choppy audio/video in VoIP
and video conferencing. For real-time applications, consistent latency (low jitter) is
often more important than raw average speed.
Yes. Both hostnames (e.g. google.com) and IPv4 addresses (e.g.
8.8.8.8) are fully supported. The tool will display the resolved IP
address alongside the hostname in the results.