South Korea Speed Test - Check Your Internet Speed | 2026
Test your internet speed in South Korea
Test your internet speed in South Korea and compare your results with national averages. This free tool measures download, upload, and latency for fiber and mobile connections. South Korea has 98% internet penetration and consistently ranks among the top countries globally for average connection speeds. KT Corporation, SK Broadband, and LG U+ dominate both fixed and mobile markets.
Internet in South Korea
South Korea leads the world in broadband infrastructure with near-universal fiber coverage and the highest 5G adoption rate globally.
The government's IT infrastructure investments since the 1990s created a competitive market with three major players: KT Corporation, SK Broadband, and LG U+. Average download speeds exceed 220 Mbps, with gigabit connections standard in urban apartments.
5G launched in 2019, and South Korea was the first country to commercialize standalone 5G networks. Mobile speeds average 120 Mbps, the fastest in the world. Ultra-high-speed 10 Gbps fiber (10GiGa Internet) is available in major cities from all three carriers.
How to Choose an ISP in South Korea
Several factors determine the best provider at your address in South Korea. Check coverage, compare pricing, and test speeds before signing a contract.
Choose between KT, SK Broadband, and LG U+
All three offer gigabit fiber across most of South Korea. KT (formerly Korea Telecom) has the largest network and widest coverage including rural areas. SK Broadband pairs with SK Telecom mobile for bundle discounts. LG U+ bundles with LG U+ Mobile and often includes IPTV at competitive prices.
Check speed tiers and pricing
Standard 500 Mbps plans cost around 30,000-35,000 KRW/month. Gigabit (1 Gbps) runs 35,000-40,000 KRW/month. 2.5 Gbps plans cost 40,000-50,000 KRW/month. KT's 10GiGa Internet (10 Gbps) is available in select apartment complexes for about 55,000 KRW/month. All providers offer 3-year contracts with lower monthly rates and installation fee waivers.
Bundle with your mobile carrier
SK Broadband paired with SK Telecom, KT Internet with KT Mobile, and LG U+ Internet with LG U+ Mobile each offer combined discounts of 5,000-15,000 KRW/month. Most Korean households save by matching their fiber and mobile providers.
Consider apartment building agreements
Many Korean apartments have pre-negotiated deals with one or two ISPs at discounted rates. Check with your building management (gwanlibi) before signing up independently. Switching ISPs in an apartment may require coordination with the building.
For budget users, 100 Mbps plans from any of the three providers cost under 25,000 KRW/month and are fast enough for streaming and general use. For gamers and heavy users, KT and SK Broadband offer the lowest latency to Korean game servers. For rural areas, KT has the best nationwide fiber coverage. All three providers offer free installation with a 3-year commitment.
Compare Internet Providers in South Korea
The table below shows top providers by connection type and maximum advertised speed.
| Provider | Type | Max Speed |
|---|---|---|
| KT Corporation | fiber | 10000 Mbps |
| SK Broadband | fiber | 10000 Mbps |
| LG U+ | fiber | 10000 Mbps |
Test Your Connection Speed
Run a speed test to verify your South Korea provider delivers advertised speeds. Test during peak evening hours for the most accurate results.
Internet Providers in South Korea
Compare internet speeds across major providers in South Korea. Click on a provider to test your connection.
South Korea Speed Test FAQ
What is the average internet speed in South Korea?
South Korea averages 220 Mbps download and 130 Mbps upload, among the highest globally. Most urban residents have access to gigabit fiber, and 10 Gbps services are expanding. Mobile 5G speeds typically exceed 100 Mbps.
Which ISP has the fastest internet in South Korea?
KT Corporation, SK Broadband, and LG U+ offer comparable speeds with gigabit fiber standard. KT's 10GiGa service provides up to 10 Gbps in select areas. For mobile, all three carriers offer robust 5G with speeds reaching 500+ Mbps in optimal conditions.
Why is South Korea internet so fast?
Government investment in IT infrastructure since the 1990s, high population density, and intense competition between KT, SK, and LG drove rapid fiber deployment. The compact geography and apartment-dominated housing made fiber installation efficient. The country prioritized broadband as a national development strategy.