Sumgait, Azerbaijan

How the Internet Reaches Sumgait

Sumgait — officially Sumqayit — is a city on the Absheron Peninsula in Azerbaijan, situated near the Caspian Sea approximately 31 kilometres north of the capital Baku. With a population of around 427,000, it is Azerbaijan's second-largest city. Its coastal position on the Caspian gives it direct access to undersea cable infrastructure, making it the sole submarine cable landing point in the country.

International internet traffic reaching Sumgait does so through a single submarine cable crossing the Caspian Sea. This cable connects Azerbaijan directly to Kazakhstan on the opposite shore, meaning that all of Azerbaijan's submarine cable capacity terminates at this one point on the Absheron Peninsula.

The Cable Serving Sumgait

The Trans-Caspian Fiber Optic Cable Project is a 341-kilometre submarine cable linking Sumgait, Azerbaijan to Aktau, Kazakhstan. The cable is scheduled to enter service in 2026 and is currently at draft stage. It runs beneath the Caspian Sea, forming a direct undersea connection between the two countries' coastal cities and establishing the only submarine data route between Azerbaijan and Kazakhstan.

Regional Context

Azerbaijan's submarine cable footprint is compact: a single cable lands at a single point — Sumgait — making it one of the more narrowly served countries in terms of undersea connectivity. This contrasts with major hub nations that host dozens of cables across numerous landing points. The Trans-Caspian Fiber Optic Cable Project, once live, will represent the entirety of Azerbaijan's direct submarine cable capacity. Aktau in Kazakhstan is the only peer landing point on the same cable.

What This Means for Connectivity

With just one submarine cable serving Azerbaijan, all international traffic routed through submarine infrastructure flows through Sumgait's single landing point. A fault on the Trans-Caspian cable would directly affect the country's entire submarine-connected capacity, leaving no alternative undersea path. The cable's sole destination is Aktau, Kazakhstan, meaning the undersea route serves connectivity between these two Caspian neighbours specifically — rather than providing a broad intercontinental corridor.

Understanding Sumgait's role as Azerbaijan's only submarine cable terminus is important for grasping the country's position within regional internet topology. The Caspian Sea crossing to Kazakhstan represents a defined, single-route link, and Sumgait's geographic position on the Absheron Peninsula makes it the natural anchor point for that infrastructure as Azerbaijan builds out its undersea connectivity.