submarinecablemap.com
SubmarineCableMap.com is a free interactive map from TeleGeography that shows the undersea fiber cables linking countries and carrying internet data around the world.
What does SubmarineCableMap.com show?
The map turns a hidden part of the internet into something you can see and explore.
It shows submarine cable systems as colored lines that cross oceans and connect coastal landing points.
You can click a cable to see its name, landing places, ready-for-service date, length, owners, and suppliers when that data is available.
You can also click a landing point to see every cable connected to that place.
This makes the site useful because the internet is not one giant invisible cloud, but a network of real cables that must reach real places.
How large is the undersea cable network?
TeleGeography says it tracks more than 600 active and planned submarine cables in its submarine cable research.
Its separate 2026 wall map shows 694 cable systems and 1,893 landing stations, which gives a good picture of how large this network has become.
The number keeps changing because new cables enter service while old systems are retired.
Many cables stretch for thousands of kilometers, yet the fiber strands that carry the light signals are very thin.
The cables use fiber-optic technology, so data moves as fast light signals through glass fibers inside protected cable layers.
How can you search the map?
The search box is one of the most useful parts of the website because you can search by cable name, country, landing location, service year, status, or cable supplier.
You can choose a country to see which systems connect it to other parts of the world.
For example, the Indonesia cable page shows many current and future systems because the country sits between major Asian and Australian network routes.
You can also open the planned cable view to see systems that are expected to join the network later.
The map supports multiple selections, so you can compare several cables, countries, landing points, years, or suppliers at the same time.
Why are cable landing points so important?
A landing point is where an undersea cable reaches land and connects with networks on shore.
Some coastal areas have many landing points because they sit near large cities, data centers, or important international routes.
A place with several independent cable links can often have better network resilience than a place that depends on only one route.
This gives the map a second use beyond simple geography because clusters of landing points can reveal where international digital connections are concentrated.
It can also help students see why islands and coastal nations depend heavily on submarine infrastructure for links to the wider internet.
Are the cable lines exact routes?
The lines on SubmarineCableMap.com are not the exact physical paths taken by cables on the ocean floor.
TeleGeography says the paths are stylized so people can follow crowded routes and see landing points more clearly.
Real cable routes are chosen after marine surveys that look for safer paths around dangerous sea-floor conditions.
This detail matters because the website is best used as a network map, not as a tool for finding the exact location of a cable at sea.
What information is missing from the free map?
The public map does not show detailed capacity figures for each cable.
TeleGeography researches lit capacity, potential capacity, and fiber-pair data, but much of that information belongs to its paid research services.
This means the free map is excellent for learning where systems connect, but it cannot tell you the full amount of data that each system can carry.
Users should also remember that a cable shown as planned may change before it is finished.
Who will find SubmarineCableMap.com useful?
Students can use it to understand how continents exchange digital data without needing deep telecom knowledge.
Teachers can use it to connect lessons about geography, technology, trade, and global communication.
Network workers can use it as a fast visual reference for cable names, owners, suppliers, service dates, and landing locations.
Journalists and researchers can use it to get basic context before checking more detailed technical or company sources.
What can the map teach you about the internet?
The biggest lesson is that global internet access depends on a physical network with important hubs, routes, and backup paths.
A good way to explore the map is to start with one country, find its landing points, follow each cable outward, and then compare those links with nearby countries.
You can also compare cables already in service with systems due to arrive in future years, which can reveal where new digital hubs may be growing.
TeleGeography has mapped submarine networks for decades, and its 2026 Submarine Cable Map marked the 30th edition of its annual telecom map.
That long history, regular updates, and simple interactive design make SubmarineCableMap.com one of the clearest places to explore the physical network beneath the modern internet.