Active Incident
Confirmed: internet outage in Czechia
Czechia · June 20, 2026 · 40 minutes
IODA detected significant connectivity drop in Czech Republic. 16 critical alerts recorded.
Evidence
75%
Anomaly Rate
16
Measurements
75%
Confidence
What This Means
75% of 16 network tests from Czechia failed to reach these services. Global baseline failure rate is typically 1-3%. This 72+ percentage point difference strongly indicates intentional blocking.
How We Detected This
Data Sourceioda
ML ModelGradientBoosting v3.3 (LOCO median F1 0.87, honest across 127 countries)
Confidence Score75% certainty of censorship
Detection TimeJune 20, 2026
Corroborating Evidence (16)
Evidence collected from multiple independent sources. Upstream claims shown in quotes are not Voidly assertions.
IODAInternet Outage Detection & Analysis16 records
outage
"IODA detected critical level outage for Plzeňský"— IODA report
Signal value: 0.99
Jun 20, 2026
View source →outage
"IODA detected critical level outage for Pardubický"— IODA report
Signal value: 0.98
Jun 20, 2026
View source →outage
"IODA detected critical level outage for Středočeský"— IODA report
Signal value: 0.98
Jun 20, 2026
View source →outage
"IODA detected critical level outage for Zlínský"— IODA report
Signal value: 0.97
Jun 20, 2026
View source →outage
"IODA detected critical level outage for Prague"— IODA report
Signal value: 0.98
Jun 20, 2026
View source →+ 11 more IODA records
What we cannot say
- Who caused it — measurement data alone does not attribute this to any government, ISP, or other actor.
- Intent — anomalous or unreachable measurements indicate interference, not a stated motive or a deliberate-vs-incidental determination.
- Which networks — no specific ASN/ISP is identified for this incident.
- The mechanism — we cannot state whether this was DNS tampering, TLS/SNI reset, an HTTP blockpage, throttling, or an infrastructure outage.
- Sub-national scope — measurement is aggregated at the country level; we cannot localize to a province, city, or network segment.
- Independent corroboration — this rests on a single source; treat it as a single-source signal, not a multi-source confirmation.
Cite This Incident
Voidly Research. (2026). Confirmed: internet outage in Czechia [CZ-2026-0009]. Voidly Global Censorship Index. https://voidly.ai/incident/CZ-2026-0009
Related
Related incidents
More in Czechia
Internet connectivity disruption in Czech Republic
2026-05-03 · Infrastructure outage
Internet connectivity disruption in Czech Republic
2026-04-29 · Infrastructure outage
Internet connectivity disruption in Czech Republic
2026-03-31 · Infrastructure outage
Network disruption detected in CZ
2026-01-12 · Infrastructure outage