# Censorship detected in IR

**Country:** 🇮🇷 Iran (IR)
**Date:** 2026-09-21
**Type:** Censorship
**Severity:** CRITICAL
**Status:** suspected

## Summary

None

## Metrics

- Confidence: 90%
- Measurements: 16
- Anomaly Rate: 100.0%

## Evidence

- **OONI** (measurement): OONI signal: 29/29 measurements anomalous (100.0%)
  - Observed: 2026-09-21
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=signal&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 28/29 measurements anomalous (96.6%)
  - Observed: 2026-09-21
  - Confidence: 89%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=whatsapp&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI telegram: 31/33 measurements anomalous (93.9%)
  - Observed: 2026-09-21
  - Confidence: 88%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=telegram&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 24/33 measurements anomalous (72.7%)
  - Observed: 2026-09-21
  - Confidence: 79%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=facebook_messenger&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI signal: 28/28 measurements anomalous (100.0%)
  - Observed: 2026-09-21
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=signal&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 29/29 measurements anomalous (100.0%)
  - Observed: 2026-09-21
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=whatsapp&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI telegram: 37/37 measurements anomalous (100.0%)
  - Observed: 2026-09-21
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=telegram&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 35/38 measurements anomalous (92.1%)
  - Observed: 2026-09-21
  - Confidence: 87%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=facebook_messenger&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI signal: 42/46 measurements anomalous (91.3%)
  - Observed: 2026-09-21
  - Confidence: 87%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=signal&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 34/39 measurements anomalous (87.2%)
  - Observed: 2026-09-21
  - Confidence: 85%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=whatsapp&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI telegram: 47/52 measurements anomalous (90.4%)
  - Observed: 2026-09-21
  - Confidence: 86%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=telegram&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 42/52 measurements anomalous (80.8%)
  - Observed: 2026-09-21
  - Confidence: 82%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=facebook_messenger&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI signal: 24/31 measurements anomalous (77.4%)
  - Observed: 2026-09-21
  - Confidence: 81%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=signal&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 25/32 measurements anomalous (78.1%)
  - Observed: 2026-09-21
  - Confidence: 81%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=whatsapp&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI telegram: 32/39 measurements anomalous (82.1%)
  - Observed: 2026-09-21
  - Confidence: 83%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=telegram&since=2026-09-21&until=2026-09-22&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 29/39 measurements anomalous (74.4%)
  - Observed: 2026-09-21
  - Confidence: 80%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=IR&test_name=facebook_messenger&since=2026-09-21&until=2026-09-22&only=anomalies)
- **CENSOREDPLANET** (http-probe): HTTP blocking (timeout): 3/6 probes blocked (50.0%) for bbc.com
  - Observed: 2026-09-21
  - Confidence: 80%
  - [CensoredPlanet raw-data portal (no per-measurement permalink)](https://data.censoredplanet.org)
- **CENSOREDPLANET** (http-probe): HTTP blocking (timeout): 3/6 probes blocked (50.0%) for facebook.com
  - Observed: 2026-09-21
  - Confidence: 80%
  - [CensoredPlanet raw-data portal (no per-measurement permalink)](https://data.censoredplanet.org)
- **CENSOREDPLANET** (http-probe): HTTP blocking (tcp-reset): 4/6 probes blocked (66.7%) for psiphon.ca
  - Observed: 2026-09-21
  - Confidence: 85%
  - [CensoredPlanet raw-data portal (no per-measurement permalink)](https://data.censoredplanet.org)

## What we cannot say

- **Who caused it** — measurement data alone does not attribute the interference 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, 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.

## Data Sources

ooni, censoredplanet

## Citation

Voidly Research. (2026). Censorship detected in IR [IR-2026-2465]. Retrieved from https://voidly.ai/incident/IR-2026-2465

---
*Report generated by Voidly Research on 2026-09-23*
*Data licensed under CC BY 4.0*
*Incident ID: IR-2026-2465*
*Permalink: https://voidly.ai/incident/IR-2026-2465*