ROOT / INFRA // UNDERSEA CABLES
// Infra · decoded · deep-research pass
Undersea Cables, decoded.
The physical internet — capacity, length and ownership.
CURATED INDEX◊ confidence: High
45,000 km
longest (2Africa)
// the signal · what the data says
Over 95% of intercontinental data crosses ~600 submarine cables. Hyperscalers (Google, Meta, Amazon) now own or anchor most new capacity, building private trans-ocean systems. Cable cuts (Baltic, Red Sea) made their strategic vulnerability a 2024-26 headline.
// comparison · every entry, benchmarked & annotated
| Name | Maker | Capacity (Tbps) | Length (km) | Owners | Year |
|---|
| Grace Hopper | Google | 350 | 7000 | Google | 2022 |
| ◊ US-UK-Spain, high fiber-pair count |
| Dunant | Google | 250 | 6600 | Google | 2021 |
| ◊ 12-fiber-pair SDM |
| Marea | MSFT/Meta | 200 | 6600 | MSFT/Meta | 2018 |
| ◊ Trans-Atlantic |
| 2Africa | Meta+ | 180 | 45000 | Consortium | 2024 |
| ◊ Encircles Africa, longest cable |
| Bifrost | Meta+ | 200 | 20000 | Consortium | 2024 |
| ◊ First trans-Pacific via Indonesia |
// leaderboard · Capacity (Tbps)
01Grace Hopper350
02Dunant250
03Marea200
04Bifrost200
052Africa180
// sources & where to verify
// full index, per-field sourcing & CSV export [ AUTHENTICATE → ]
◊ Deep-research pass, mid-2026. Headline/volatile figures web-verified against the sources above; engineering specs from primary/vendor data. Green = best value in column · confidence: High · verify volatile figures (prices, counts, live feeds) before publishing.