Active Incident
Confirmed: sustained censorship in Iran (2026-06)
Iran · June 2, 2026 · Ongoing
OONI detected 3 days of elevated network interference averaging 83.3% anomaly rate.
Evidence
83%
Anomaly Rate
3
Measurements
72%
Confidence
What This Means
83% of 3 network tests from Iran failed to reach these services. Global baseline failure rate is typically 1-3%. This 80+ percentage point difference strongly indicates intentional blocking.
How We Detected This
Data Sourceooni + censoredplanet
ML ModelGradientBoosting v3.3 (LOCO median F1 0.87, honest across 127 countries)
Confidence Score72% certainty of censorship
Detection TimeJune 2, 2026
Corroborating Evidence (97)
Evidence collected from multiple independent sources. Upstream claims shown in quotes are not Voidly assertions.
OONIOpen Observatory of Network Interference65 records
blocking
"OONI signal: 39/41 measurements anomalous (95.1%)"— OONI report
Signal value: 0.95
Jun 4, 2026
View source →blocking
"OONI whatsapp: 40/42 measurements anomalous (95.2%)"— OONI report
Signal value: 0.95
Jun 4, 2026
View source →blocking
"OONI telegram: 39/41 measurements anomalous (95.1%)"— OONI report
Signal value: 0.95
Jun 4, 2026
View source →blocking
"OONI signal: 43/44 measurements anomalous (97.7%)"— OONI report
Signal value: 0.98
Jun 4, 2026
View source →blocking
"OONI whatsapp: 43/45 measurements anomalous (95.6%)"— OONI report
Signal value: 0.96
Jun 4, 2026
View source →+ 60 more OONI records
Censored PlanetUniversity of Michigan research32 records
http-blocking-timeout
"HTTP blocking (timeout): 2/3 probes blocked (66.7%) for bbc.com"— Censored Planet report
Signal value: 0.67
Jun 4, 2026
View source →http-blocking-timeout
"HTTP blocking (timeout): 2/3 probes blocked (66.7%) for facebook.com"— Censored Planet report
Signal value: 0.67
Jun 4, 2026
View source →http-blocking-timeout
"HTTP blocking (timeout): 2/3 probes blocked (66.7%) for psiphon.ca"— Censored Planet report
Signal value: 0.67
Jun 4, 2026
View source →http-blocking-timeout
"HTTP blocking (timeout): 2/3 probes blocked (66.7%) for signal.org"— Censored Planet report
Signal value: 0.67
Jun 4, 2026
View source →http-blocking-timeout
"HTTP blocking (timeout): 2/3 probes blocked (66.7%) for youtube.com"— Censored Planet report
Signal value: 0.67
Jun 4, 2026
View source →+ 27 more Censored Planet records
Affected Services (5)
ClaudeFacebook MessengerSignalTelegramWhatsApp
Blocked Domains (2)
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: sustained censorship in Iran (2026-06) [IR-2026-0253]. Voidly Global Censorship Index. https://voidly.ai/incident/IR-2026-0253