Do Submarine Cables Account For Over 99% of Intercontinental Data Traffic?

“Submarine cables account for over 99% of intercontinental data traffic” is regularly quoted in the press with no source given.

It’s time for some fact-checking.

Getting to the Source

While digging into the origin of this myth, I was able to find one instance where a source was given. It was accredited to us, TeleGeography.

The citation linked to our Submarine Cable FAQs page, which states: “Statistics released by U.S. Federal Communications Commission indicate that satellites account for just 0.37% of all U.S. international capacity.” 

We're only talking about U.S. international capacity here—not the total global capacity—and in relation to satellites.

I decided to go to the FCC’s website next.

Below, you’ll see a screenshot from the FCC’s Circuit Status Report page and a list of the reports that they offer.

The most recent data is for 2013, released in 2015. It’s almost 10 years old now; not a great source.

There’s no new data because the FCC changed the reporting requirement and satellite operators don’t have to report their circuits anymore. So that’s a dead-end for us, unfortunately.

Other Ways To Test This Myth

The Conclusion

So, do submarine cables account for over 99% of intercontinental data traffic?

We can confirm that this is true. However, we can’t do precise calculations without data for intercontinental satellite traffic.