Based on real measurements from GeoCables monitoring infrastructure, March 2026
At just 200ms, the Belarus–South Korea route is remarkably efficient for a distance exceeding 7,000km. This impressive latency is achieved through a well-optimized path leveraging the Trans-Siberian terrestrial fiber network and strategic handoffs between major carriers. While Belarus is a landlocked country with no direct access to submarine cables, its connectivity is enhanced by robust terrestrial links through Moscow and onward to Hong Kong, making this one of the most efficient routes in GeoCables' Eurasian measurement set.
The Traceroute
| 1–2 | Minsk, BY | A1 Belarus (AS42772) | 7ms |
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| 3–6 | Minsk, BY | Business Network / NTEC (AS12406/AS60280) | 2ms |
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| 7 | Moscow, RU | TransTeleCom (AS20485) | 11ms |
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| 8 | Hong Kong, HK | (unknown carrier) | 178ms |
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| 10–14 | Seoul, KR | Korea Telecom (AS4766) | 200ms |
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The standout segment of this route is the Moscow-to-Hong Kong leg, which achieves a latency of 167ms over approximately 6,400km. This performance aligns closely with the theoretical limits of fiber optic propagation, underscoring the efficiency of the Trans-Siberian backbone and its integration with Chinese and Hong Kong-based networks.
Why This Route Works So Well
The Trans-Siberian Fiber Route
Russia's TransTeleCom (AS20485) operates one of the world's most extensive terrestrial fiber networks, spanning over 75,000km. This network runs parallel to the historic Trans-Siberian Railway, connecting key cities from Moscow to Vladivostok. The Moscow-to-Hong Kong segment leverages this backbone, with traffic likely passing through Chinese carriers to reach Hong Kong. The RTT of 167ms for this segment reflects the high quality and directness of the route, with minimal detours or inefficiencies.
Efficient Handoff to Korea Telecom
Once traffic reaches Hong Kong, Korea Telecom (AS4766) ensures a seamless and direct connection to Seoul. KT's extensive infrastructure includes submarine cables like the
<a href="/cable/korea-japan-cable-network-kjcn">Korea-Japan Cable Network (KJCN)</a> and
AJC (Asia-Japan Cable), which facilitate low-latency connectivity between East Asian hubs. The Hong Kong-to-Seoul segment benefits from this optimized infrastructure, keeping the total RTT to just 200ms.
Minsk to Seoul: The Full Picture
The route from Minsk to Seoul is a textbook example of efficient BGP routing that aligns well with geography:
- Minsk → Moscow (11ms): Traffic originates in Belarus, passing through A1 Belarus and NTEC networks before reaching TransTeleCom's backbone in Moscow. The domestic routing within Belarus is clean and efficient, contributing minimal latency.
- Moscow → Hong Kong (178ms): The Trans-Siberian fiber backbone carries traffic across Russia, with a likely handoff to Chinese carriers for the final leg to Hong Kong. This segment is the longest but remains highly optimized.
- Hong Kong → Seoul (200ms): Korea Telecom ensures a direct and reliable connection to Seoul, likely utilizing submarine cables such as APG (Asia Pacific Gateway) or <a href="/cable/eac-c2c">EAC-C2C</a>.
200ms: Acceptable for Almost Everything
A round-trip time of 200ms is sufficient for a wide range of applications:
- Web browsing: Excellent performance with near-instant page loads.
- Video calls: Smooth communication, staying well below the 300ms threshold for noticeable delays.
- Online gaming: Acceptable for most genres, though competitive gamers may prefer lower latency.
- Financial trading: Marginal, as high-frequency trading typically requires latencies under 50ms.
Monitoring Status
- Current RTT: 200ms | Best path in our Eurasian database
- Path: Minsk → Moscow (TransTeleCom) → Hong Kong → Seoul (Korea Telecom)
- Key insight: The Trans-Siberian terrestrial fiber route, combined with efficient handoffs in Hong Kong and Seoul, outperforms alternative paths through Europe for East Asian destinations.
This route exemplifies the power of well-coordinated terrestrial and submarine infrastructure, showcasing how advanced fiber networks can bridge vast distances with minimal latency. GeoCables' monitoring confirms the stability and efficiency of this path, making it a standout in Eurasian connectivity.
