Active Incident
Internet outage in Iran
Iran · July 29, 2026 · 19 hours
IODA detected significant connectivity drop in Iran. 3 critical alerts recorded. CenAlert confirms censorship activity.
Evidence
21%
Anomaly Rate
3
Measurements
67%
Confidence
What This Means
21% 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 Score67% certainty of censorship
Detection TimeJuly 29, 2026
Corroborating Evidence (56)
Evidence collected from multiple independent sources. Upstream claims shown in quotes are not Voidly assertions.
IODAInternet Outage Detection & Analysis18 records
outage
"IODA detected critical level outage for East Azarbaijan"— IODA report
Signal value: 0.02
Jul 29, 2026
View source →outage
"IODA detected critical level outage for Tehran"— IODA report
Signal value: 0.02
Jul 29, 2026
View source →outage
"IODA detected critical level outage for Sistan and Baluchestan"— IODA report
Signal value: 0.18
Jul 29, 2026
View source →outage
"IODA detected critical level outage for Qom"— IODA report
Signal value: 0.01
Jul 29, 2026
View source →outage
"IODA detected critical level outage for South Khorasan"— IODA report
Signal value: 0.30
Jul 29, 2026
View source →+ 13 more IODA records
Censored PlanetUniversity of Michigan research38 records
dns-blocking
"DNS blocking detected: 24/24 probes anomalous (100.0%) for bbc.com"— Censored Planet report
Signal value: 1.00
Jul 29, 2026
View source →dns-blocking
"DNS blocking detected: 38/38 probes anomalous (100.0%) for chat.openai.com"— Censored Planet report
Signal value: 1.00
Jul 29, 2026
View source →dns-blocking
"DNS blocking detected: 37/37 probes anomalous (100.0%) for chatgpt.com"— Censored Planet report
Signal value: 1.00
Jul 29, 2026
View source →dns-blocking
"DNS blocking detected: 39/39 probes anomalous (100.0%) for claude.ai"— Censored Planet report
Signal value: 1.00
Jul 29, 2026
View source →dns-blocking
"DNS blocking detected: 27/27 probes anomalous (100.0%) for facebook.com"— Censored Planet report
Signal value: 1.00
Jul 29, 2026
View source →+ 33 more Censored Planet records
Affected Services (20)
BBCChatGPTClaudeFacebookGeminiInstagramLanternMediumNew York TimesProton VPNProtonVPNPsiphonSignalTelegramThe GuardianTikTokTwitter/XWhatsAppXYouTube
Blocked Domains (25)
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). Internet outage in Iran [IR-2026-2082]. Voidly Global Censorship Index. https://voidly.ai/incident/IR-2026-2082