Confirmed: internet outage in Iran

Voidly Research

Active Incident

Confirmed: internet outage in Iran

Iran · April 29, 2026 · 19 hours

IODA detected significant connectivity drop in Iran. 5 critical alerts recorded. CenAlert confirms censorship activity.

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Evidence

27%

Anomaly Rate

5

Measurements

70%

Confidence

What This Means

27% of tests showed anomalies, above the typical 1-3% baseline. This suggests potential network interference.

How We Detected This

Data Sourceioda + censoredplanet

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

Confidence Score70% certainty of censorship

Detection TimeApril 29, 2026

Full methodology →

Corroborating Evidence (29)

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

IODAInternet Outage Detection & Analysis17 records

outage

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

Signal value: 0.24

Apr 29, 2026

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outage

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

Signal value: 0.24

Apr 29, 2026

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outage

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

Signal value: 0.01

Apr 29, 2026

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outage

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

Signal value: 0.28

Apr 29, 2026

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outage

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

Signal value: 0.24

Apr 29, 2026

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+ 12 more IODA records

Censored PlanetUniversity of Michigan research12 records

dns-blocking

"DNS blocking detected: 4/4 probes anomalous (100.0%) for chat.openai.com"— Censored Planet report

Signal value: 1.00

Apr 29, 2026

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dns-blocking

"DNS blocking detected: 4/4 probes anomalous (100.0%) for chatgpt.com"— Censored Planet report

Signal value: 1.00

Apr 29, 2026

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dns-blocking

"DNS blocking detected: 5/5 probes anomalous (100.0%) for claude.ai"— Censored Planet report

Signal value: 1.00

Apr 29, 2026

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dns-blocking

"DNS blocking detected: 5/5 probes anomalous (100.0%) for gemini.google.com"— Censored Planet report

Signal value: 1.00

Apr 29, 2026

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dns-blocking

"DNS blocking detected: 5/5 probes anomalous (100.0%) for huggingface.co"— Censored Planet report

Signal value: 1.00

Apr 29, 2026

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+ 7 more Censored Planet records

Affected Services (9)

ChatGPTClaudeGeminiMediumNew York TimesPsiphonThe GuardianTikTokTwitter/X

Blocked Domains (12)

chat.openai.com chatgpt.com claude.ai gemini.google.com huggingface.co medium.com nytimes.com openai.com psiphon.ca substack.com theguardian.com tiktok.com

Click any domain to view raw OONI measurements

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.

Cite This Incident

Voidly Research. (2026). Confirmed: internet outage in Iran [IR-2026-0187]. Voidly Global Censorship Index. https://voidly.ai/incident/IR-2026-0187

↓ BibTeX ↓ RIS ↓ Markdown ↓ JSON Full citation page →·CC BY 4.0·IR-2026-0187

Confirmed: internet outage in Iran

Evidence

What This Means

How We Detected This

Corroborating Evidence (29)

Affected Services (9)

Blocked Domains (12)

What we cannot say

Cite This Incident

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