North Korea's fiber optic network connects major cities domestically and links internationally via China and Russia, forming the backbone of its controlled telecommunications system.

Domestic Fiber Optic Infrastructure

North Korea began deploying fiber optic cables in the mid-1990s, with the first cable connecting Pyongyang to Hamhung in September 1995. Subsequent expansions included connections from Pyongyang to Sinuiju on the Chinese border in 1998, and by 2000, cables linked Pyongyang to Nampo, Hamhung to Rajin-Songpa, and Rajin-Songpa to Hunchun, China . Fiber optic lines are also reported along major roads and railway tracks, particularly along the Sea of Japan coast, facilitating connectivity between cities and industrial regions . All government ministries are connected to the domestic intranet, Kwangmyeong, via fiber optics, ensuring centralized control over communications .

International Connectivity

North Korea's main international internet connection is through a fiber optic cable linking Pyongyang with Dandong, China, operated by China Unicom . Additionally, in 2017, a new fiber optic cable from Russia was established, crossing the Tumen River via the Korea-Russia Friendship Bridge and connecting to Pyongyang through the east coast . These international links are critical for limited external communications, controlled internet access, and potential economic exchanges.

Technological and Strategic Considerations

Fiber optic cables in North Korea are essential for high-speed, reliable data transmission, offering significant improvements over older copper wire systems . The network supports mobile operators like Koryolink and Kangsong NET, with 4G services launched in 2023, providing faster data speeds and enabling digital services . Despite these advancements, the regime maintains strict control over information flow, limiting public internet access and monitoring usage through digital signatures and logging systems . Satellite imagery and external analysis provide limited insights into the network, making the full extent of North Korea's fiber optic infrastructure difficult to verify .

Implications

The expansion of fiber optic networks in North Korea has both economic and geopolitical significance. Domestically, it enhances communication efficiency and supports mobile and intranet services. Internationally, connections with China and Russia provide controlled access to global networks, while also reflecting the strategic importance of telecommunications in North Korea's modernization and information control efforts . In summary, North Korea's fiber optic network is a strategically deployed system linking key cities internally and connecting externally through China and Russia, balancing modernization with strict state control over information.