Active Incident
Confirmed: historical blocking: IR 2022-09-13 to 2023-01-18
Iran · September 13, 2022 · 128 days
Backfilled from OONI historical archive. 128 anomalous day(s), 687 measurements, 86% anomaly rate. Signal types: block, interference. Signal levels: critical.
Evidence
86%
Anomaly Rate
687
Measurements
98%
Confidence
What This Means
86% of 687 network tests from Iran failed to reach these services. Global baseline failure rate is typically 1-3%. This 83+ percentage point difference strongly indicates intentional blocking.
How We Detected This
Data Sourceooni-historical-backfill
ML ModelGradientBoosting v3.3 (LOCO median F1 0.87, honest across 127 countries)
Confidence Score98% certainty of censorship
Detection TimeSeptember 13, 2022
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. (2022). Confirmed: historical blocking: IR 2022-09-13 to 2023-01-18 [IR-2022-0511]. Voidly Global Censorship Index. https://voidly.ai/incident/IR-2022-0511
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