Internet outage in Iran

Voidly Research

Active Incident

Internet outage in Iran

Iran · April 21, 2026 · 21 hours

IODA detected significant connectivity drop in Iran. 1 critical alerts recorded.

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Evidence

32%

Anomaly Rate

1

Measurements

65%

Confidence

What This Means

32% of tests showed anomalies, above the typical 1-3% baseline. This suggests potential network interference.

How We Detected This

Data Sourceioda

ML ModelGradientBoosting v3.3 (LOCO median F1 0.87, honest across 127 countries)

Confidence Score65% certainty of censorship

Detection TimeApril 21, 2026

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Corroborating Evidence (10)

Evidence collected from multiple independent sources. Upstream claims shown in quotes are not Voidly assertions.

IODAInternet Outage Detection & Analysis10 records

outage

"IODA detected critical level outage for Alborz"— IODA report

Signal value: 0.32

Apr 21, 2026

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outage

"IODA detected critical level outage for Alborz"— IODA report

Signal value: 0.24

Apr 21, 2026

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outage

"IODA detected critical level outage for Alborz"— IODA report

Signal value: 0.36

Apr 21, 2026

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outage

"IODA detected critical level outage for Alborz"— IODA report

Signal value: 0.32

Apr 21, 2026

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outage

"IODA detected critical level outage for Alborz"— IODA report

Signal value: 0.24

Apr 21, 2026

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+ 5 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). Internet outage in Iran [IR-2026-0168]. Voidly Global Censorship Index. https://voidly.ai/incident/IR-2026-0168

↓ BibTeX ↓ RIS ↓ Markdown ↓ JSON Full citation page →·CC BY 4.0·IR-2026-0168

Internet outage in Iran

Evidence

What This Means

How We Detected This

Corroborating Evidence (10)

What we cannot say

Cite This Incident

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