# Sustained censorship in CZ (2026-09)

**Country:** 🇨🇿 Czechia (CZ)
**Date:** 2026-09-06
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

OONI detected 5 days of elevated network interference averaging 90.0% anomaly rate.

## Metrics

- Confidence: 80%
- Measurements: 5
- Anomaly Rate: 90.0%

## Evidence

- **OONI** (measurement): OONI: confirmed-blocked across 3 distinct ASNs in CZ (4 confirmed of 9 measurements, 2026-09-06..2026-09-20)
  - Observed: 2026-09-06
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CZ&test_name=web_connectivity&domain=1-x-bet.com&since=2026-09-06&until=2026-09-20&only=confirmed)
- **OONI** (measurement): OONI: confirmed-blocked across 3 distinct ASNs in CZ (4 confirmed of 9 measurements, 2026-09-06..2026-09-20)
  - Observed: 2026-09-06
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CZ&test_name=web_connectivity&domain=1x-bet.com&since=2026-09-06&until=2026-09-20&only=confirmed)
- **OONI** (measurement): OONI: confirmed-blocked across 3 distinct ASNs in CZ (4 confirmed of 9 measurements, 2026-09-06..2026-09-20)
  - Observed: 2026-09-06
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CZ&test_name=web_connectivity&domain=1xbet38.com&since=2026-09-06&until=2026-09-20&only=confirmed)
- **OONI** (measurement): OONI: confirmed-blocked across 3 distinct ASNs in CZ (4 confirmed of 9 measurements, 2026-09-06..2026-09-20)
  - Observed: 2026-09-06
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CZ&test_name=web_connectivity&domain=1xbet87.com&since=2026-09-06&until=2026-09-20&only=confirmed)
- **OONI** (measurement): OONI: confirmed-blocked across 3 distinct ASNs in CZ (5 confirmed of 9 measurements, 2026-09-06..2026-09-20)
  - Observed: 2026-09-06
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=CZ&test_name=web_connectivity&domain=1xbet95.com&since=2026-09-06&until=2026-09-20&only=confirmed)

## What we cannot say

- **Who caused it** — measurement data alone does not attribute the interference 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, HTTP blockpage, throttling, or an infrastructure outage.
- **A confirmed duration** — we report the observation window, not a verified start/stop of any block.
- **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.

## Data Sources

ooni

## Citation

Voidly Research. (2026). Sustained censorship in CZ (2026-09) [CZ-2026-0017]. Retrieved from https://voidly.ai/incident/CZ-2026-0017

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*Report generated by Voidly Research on 2026-09-20*
*Data licensed under CC BY 4.0*
*Incident ID: CZ-2026-0017*
*Permalink: https://voidly.ai/incident/CZ-2026-0017*