Internet status in South Korea Operational
Country-level signal dip: 0% · 2026-06-07 23:08:33 UTC
Leading providers
| Provider | ASN | Population share | Status | Signal dip |
|---|---|---|---|---|
| Korea Telecom | AS4766 | 46.06% | Operational · country signal | — |
| LG POWERCOMM | AS17858 | 19.29% | Operational · country signal | — |
| SK Telecom | AS9644 | 10.93% | Operational · country signal | — |
| LGTELECOM | AS17853 | 7.00% | Operational · country signal | — |
| LG DACOM Corporation | AS3786 | 5.01% | Operational · country signal | — |
Per-ISP signals are measured when the country shows anomalies (and continuously for pilot countries); «No data» means no anomaly drill has been needed recently.
ℹ️ How to read this page
Operational — signal at normal levels for this country / provider
Degraded — signal dip ≥20% below its 24h baseline — partial outage or major disturbance
Major outage — dip ≥50% — large-scale loss of connectivity
“Signal dip” compares the current BGP-visibility and active-probing levels against the median of the previous 24 hours, corrected for global measurement artifacts (a worldwide simultaneous drop is ignored).
Data refreshes hourly. Per-ISP rows are measured in depth when the country shows an anomaly (pilot countries — continuously). The probable cause is a heuristic: an active fault on a submarine cable feeding the country ranks first, then routing signals, then power/access patterns.
Degraded — signal dip ≥20% below its 24h baseline — partial outage or major disturbance
Major outage — dip ≥50% — large-scale loss of connectivity
“Signal dip” compares the current BGP-visibility and active-probing levels against the median of the previous 24 hours, corrected for global measurement artifacts (a worldwide simultaneous drop is ignored).
Data refreshes hourly. Per-ISP rows are measured in depth when the country shows an anomaly (pilot countries — continuously). The probable cause is a heuristic: an active fault on a submarine cable feeding the country ranks first, then routing signals, then power/access patterns.
Submarine cables feeding South Korea
If a national outage coincides with a fault on one of these systems, the cable is a likely cause — check its live page:
APCN-2
Asia Pacific Gateway (APG)
Asia United Gateway East (AUG East)
E2A
EAC-C2C
FLAG Europe-Asia (FEA)
FLAG North Asia Loop/REACH North Asia Loop
I-AM Cable
JAKO
Jeju-Mainland 2
Jeju-Mainland 3
Jeju-Udo
Korea-Japan Cable Network (KJCN)
New Cross Pacific (NCP) Cable System
Sources: APNIC population-per-AS estimates · IODA (Georgia Tech) BGP & active-probing signals · GeoCables submarine-cable telemetry. Status is heuristic, not an official provider statement.