Global Availability Checker
Check website reachability from around the world
What Is Global Availability and Why Measure It?
Global availability is how reachable your website is for visitors in different parts of the world. A page that loads instantly in your office can be painfully slow — or fail completely — from another continent. Network latency, regional outages, submarine cable disruptions, and ISP-level peering issues all affect how users experience your site.
For businesses serving international audiences (e-commerce, SaaS, media), poor regional availability translates directly into lost revenue and rankings: Google factors page experience into Core Web Vitals, and slow regions hurt both conversion and SEO.
How to Use This Tool
- Enter the URL or domain you want to check in the field above.
- Click Check to query our monitoring network.
- Review the global RTT map, best and worst regions, and any active anomalies.
- Pick a time window (12h / 24h / 72h) to see longer trends.
For a deeper dive into the network path itself — including which submarine cables connect users to your server — use our Internet Route Analyzer.
How Our Global Availability Checker Works
Unlike generic ping tools that send a single test packet at request time, this tool draws on continuous infrastructure monitoring data from the GeoCables.com submarine cable monitoring network:
- 80+ monitoring probes distributed across countries on every populated continent, measuring round-trip time (RTT) and reachability around the clock.
- RIPE Atlas integration — measurements are reinforced by RIPE Atlas, the global research network of distributed probes maintained by the RIPE NCC.
- Aggregated time windows — instead of a one-shot snapshot, you see 12h, 24h, and 72h averages so you can tell a one-off spike from a sustained regional problem.
- Anomaly detection — when a region's latency or loss diverges from its own historical baseline, our system flags it as an active anomaly, so you instantly see whether something is broken right now.
- Submarine cable correlation — for each server location, we surface the physical submarine cables landing nearby, since cable cuts and maintenance windows are a leading cause of regional disruptions.
Understanding the Metrics
Round-Trip Time (RTT)
The time in milliseconds for a packet to travel from a monitoring probe to your server and back. RTT of 50ms or less is excellent, 100–200ms is acceptable for most regions, and over 300ms typically degrades user experience noticeably.
Best and Worst Regions
The geographic areas with the lowest and highest measured latency to the target. Use these to decide where you might want a CDN edge or a regional replica.
Anomaly Detection
A region is marked anomalous when its current RTT or packet loss is statistically out of line with its own historical baseline (not a global threshold). This avoids false alarms in regions that are simply always far away.
Time Periods (12h / 24h / 72h)
Short windows surface acute incidents; longer windows reveal chronic issues and let you compare against typical conditions. If a region looks bad in 12h but normal in 72h, you are probably seeing a transient event.
Cable Landing Points
Submarine cables physically connect continents. When a cable lands near your server's region, traffic from the other end of that cable benefits. When cables go down (faults, maintenance, anchor strikes), entire regions can become slow or unreachable. Seeing the cables that serve your server helps explain why certain regions behave the way they do.
Frequently Asked Questions
How is this different from a regular ping test?
A regular ping fires off a single test from one machine at the time you click. Our tool aggregates continuous measurements from 80+ probes around the world, so you get a stable, statistically meaningful picture rather than a one-off result that could just reflect your own local network conditions.
What does RTT mean and what is a good value?
RTT (round-trip time) is the time in milliseconds for a packet to reach your server and come back. Under 50ms is excellent, 100–200ms is workable for most applications, and over 300ms usually feels sluggish to end users. The right target depends on your audience — if most users are nearby, low RTT to far regions matters less.
Why do some regions show very high latency even when my server is up?
Distant regions can have high latency for purely physical reasons: light travels through fiber at finite speed, and a packet going from Sydney to your European server passes through many submarine cables and routers. High latency is not necessarily a problem — the question is whether it is consistent with the distance, or worse than expected (which our anomaly detection flags).
Can this tool detect downtime in a specific country?
Yes. If our probes in a region consistently fail to reach your server, you will see elevated loss or marked anomalies for that region. This is especially useful for catching outages that affect just one country or ISP — cases that a single-location uptime monitor would miss entirely.
How fresh is the data?
The map and metrics use rolling time windows (12h, 24h, 72h) of continuously-collected data. The most recent measurements are typically only minutes old.
Is there a cost or rate limit?
No. The Global Availability Checker is fully free, requires no signup, and has no usage limits for normal browsing. It is supported by ads on the page.
About This Tool
The Global Availability Checker is operated by the FreeGetStats team in partnership with the GeoCables.com monitoring infrastructure project, which has been continuously measuring global internet reachability and submarine cable health since 2024. We use only first-party measurement data and publicly available cable infrastructure information, and do not store the URLs you check.
For feedback or to suggest additional regions, use our contact page.