Active Incident
Confirmed: internet outage in Iran
Iran · May 3, 2026 · Ongoing
IODA detected significant connectivity drop in Iran. 5 critical alerts recorded. CenAlert confirms censorship activity.
Evidence
54%
Anomaly Rate
5
Measurements
70%
Confidence
What This Means
54% of 5 network tests from Iran failed to reach these services. Global baseline failure rate is typically 1-3%. This 51+ percentage point difference strongly indicates intentional blocking.
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 TimeMay 3, 2026
Corroborating Evidence (16)
Evidence collected from multiple independent sources. Upstream claims shown in quotes are not Voidly assertions.
IODAInternet Outage Detection & Analysis5 records
outage
"IODA detected critical level outage for Alborz"— IODA report
Signal value: 0.70
May 3, 2026
View source →outage
"IODA detected critical level outage for Gilan"— IODA report
Signal value: 0.44
May 3, 2026
View source →outage
"IODA detected critical level outage for Esfahan"— IODA report
Signal value: 0.41
May 3, 2026
View source →outage
"IODA detected critical level outage for East Azarbaijan"— IODA report
Signal value: 0.52
May 3, 2026
View source →outage
"IODA detected critical level outage for Fars"— IODA report
Signal value: 0.65
May 3, 2026
View source →Censored PlanetUniversity of Michigan research11 records
dns-blocking
"DNS blocking detected: 3/3 probes anomalous (100.0%) for chat.openai.com"— Censored Planet report
Signal value: 1.00
May 3, 2026
View source →dns-blocking
"DNS blocking detected: 2/2 probes anomalous (100.0%) for chatgpt.com"— Censored Planet report
Signal value: 1.00
May 3, 2026
View source →dns-blocking
"DNS blocking detected: 3/3 probes anomalous (100.0%) for claude.ai"— Censored Planet report
Signal value: 1.00
May 3, 2026
View source →dns-blocking
"DNS blocking detected: 3/3 probes anomalous (100.0%) for gemini.google.com"— Censored Planet report
Signal value: 1.00
May 3, 2026
View source →dns-blocking
"DNS blocking detected: 3/3 probes anomalous (100.0%) for huggingface.co"— Censored Planet report
Signal value: 1.00
May 3, 2026
View source →+ 6 more Censored Planet records
Affected Services (8)
ChatGPTClaudeGeminiMediumNew York TimesPsiphonThe GuardianTwitter/X
Blocked Domains (11)
chat.openai.comchatgpt.comclaude.aigemini.google.comhuggingface.comedium.comnytimes.comopenai.compsiphon.casubstack.comtheguardian.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.
- 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.
Cite This Incident
Voidly Research. (2026). Confirmed: internet outage in Iran [IR-2026-0195]. Voidly Global Censorship Index. https://voidly.ai/incident/IR-2026-0195