User Guide

Type any two cities, IP addresses, or domain names. GeoCables will find the nearest cable landing points and calculate the actual route.

Press Calculate to get cable distance, estimated latency, and a visual route on the map.

Straight-line is the geometric shortest path. Cable route is the real distance your data travels — cables follow the ocean floor, avoid seismic zones, and stop at intermediate landing points. Always longer.

Round-trip time: how long a packet takes there and back. Light travels through glass fiber at ~200,000 km/s — so even a perfect London→Tokyo ping can't be under 100ms. Real-world adds routing and processing on top.

Builds a full hop-by-hop route: overland segments + submarine cables + intermediate cities. Shows which specific cables your traffic crosses.

The status bar shows how many cables are actively monitored and when the last measurement was taken. Each cable is checked every 2-3 hours from the nearest probe.

Green = normal, yellow = degraded, red = critical or down, grey = unmonitored. Click any cable to highlight it and see its current RTT, hops, and baseline comparison.

The Alerts tab shows active anomalies and elevated routes. The Checks tab shows all recent measurements — RTT, hop count, ratio vs baseline, and confidence level.

The system compares current RTT against a rolling baseline for each cable. When the ratio exceeds 4×, it's flagged as an anomaly. Ratios above 2.5× are marked as elevated, and above 1.3× as above normal.

Enable "Cable anomaly alerts" in your profile settings to receive email notifications when anomalies or elevated routes are detected.

Each cable has a dedicated page with technical specs, landing points, length, owners, and current health status from our monitoring system.

Each landing point shows which cables connect there, the city and country, and links to related routes and monitoring data.

Our research section features in-depth analyses of submarine cable routes, anomalies, and infrastructure — written by our engineering team.

Sign up with your email to create an account. Verify your email to unlock all features including API access and notifications.

Save frequently used routes by clicking the star icon in calculator results. Access them anytime from your profile.

Generate a personal API key from your profile to integrate GeoCables data into your own applications and monitoring systems.

Toggle "Cable anomaly alerts" in Settings to receive email digests when submarine cable anomalies or elevated latency is detected.