voidly

Internet censorship in Iran

Iran (IR) · · Atom

40
Censorship Score
Level
high
Risk Tier
T1Severe
Trend
↑ worsening
Global Rank
#3
Incidents
57

Overview

Iran implements pervasive internet filtering, blocking social media and news sites. Filtering intensifies during protests and political events.

Evidence provenance
10 records from 1 source
  • IODA10 (100%)
    ASN-level outage signals + BGP

Every record carries a permalink back to its upstream measurement. Click a source label to drill into the raw data for Iran.

7-Day Risk Forecast

Predictive AI

Machine learning prediction of censorship risk based on historical patterns and political events. Calibrated 2026-05-20 via isotonic refit on 810 live outcomes. See drivers + similar past events →

Loading forecast...

Multi-horizon shutdown forecast — Iran

monotonic ok
Next 1 day
22.1%
Next 7 days
35.6%
Next 30 days
95.2%

Honest scope: this is a current-regime risk signal, not a shutdown-onset predictor. It reliably flags countries already in a sustained blocking regime; on the days a new shutdown actually begins its skill is at/below chance (transition-row AUC ~0.33). Why →

ML Intelligence

Atlas models · 2026-05-21

Composite signals from Voidly Atlas's ML model suite — censorship intensity, contagion follow-risk, expected shutdown duration and behavioral peers. Model changelog →

Voidly Score
25.1/ 100
▲ 1.12 vs yesterday
How this is computed →
Expected shutdown duration
~5days
If a critical shutdown occurs · IQR ±2d
Evidence grade mix (57)
A: 40B: 16F: 1
Grading rubric →
Try-first circumvention tool
Tor · anonymity-network · 54% probe success (partial)
Full evasion table →
Behaviorally similar countries
AE87%TH87%TR86%

Similarity is behavioral (how a country blocks), not political.

Recent Incidents

10 active
Confirmed: internet outage in Iran
6d ago
23% anomaly · 5 measurements
Internet outage in Iran
May 17
22% anomaly · 3 measurements
Internet outage in Iran
May 16
24% anomaly · 4 measurements
Internet outage in Iran
May 15
24% anomaly · 2 measurements
Confirmed: internet outage in Iran
May 14
23% anomaly · 5 measurements
View all 57 incidents →

ISPs in Iran

Known blocked services

YouTubeFacebookTwitterTelegramInstagram

Recommendations

  • Use Voidly VPN with bridge mode
  • Enable domain fronting
  • Use encrypted DNS

Data

Measurements323,843
Blocked count128,227
Block rate39.6%
Last updated2026-05-24
API endpoint/data/country/IR

Protocol breakdown

309K
Web
8K
Telegram
8K
WhatsApp

Frequently asked questions about censorship in Iran

Q01

Is the internet censored in Iran?

+
Voidly classifies Iran as high (censorship score 40/100, risk tier 1: Severe). Iran implements pervasive internet filtering, blocking social media and news sites. Filtering intensifies during protests and political events.
Q02

What websites are blocked in Iran?

+
Recent measurements show blocking or interference for: YouTube, Facebook, Twitter, Telegram, Instagram. The block-rate across all measured domains is 39.6% over 323,843 samples. Live per-domain status: https://api.voidly.ai/v1/accessibility/check?domain={domain}&country=IR.
Q03

How does Iran's censorship compare globally?

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Iran ranks #3 on the Voidly Global Censorship Index. The current trend is worsening — block rates trending up.
Q04

What blocking methods are used in Iran?

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Voidly's pipeline detects DNS poisoning, TCP-RESET, blockpage injection, TLS-RESET / SNI-based blocking, and ASN-level outages. The exact method per domain is in each evidence permalink (https://api.voidly.ai/data/incidents?country=IR). Methodology: https://voidly.ai/methodology.
Q05

How fresh is the data for Iran?

+
Voidly probes Iran every 5 minutes from 37+ global probe nodes. Upstream OONI, IODA, and CensoredPlanet feeds refresh every 6 hours. The country snapshot was last regenerated 2026-05-24.
Q06

How can I check if a specific website is blocked in Iran?

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Three options. (1) REST: GET https://api.voidly.ai/v1/accessibility/check?domain=twitter.com&country=IR. (2) MCP: npx @voidly/mcp-server, then call check_domain_blocked with domain="twitter.com" country="IR". (3) CLI: npx @voidly/cli check twitter.com IR. All three return current status, blocking method, and evidence permalinks.
Q07

Can I use a VPN to bypass censorship in Iran?

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Use Voidly VPN with bridge mode Enable domain fronting Use encrypted DNS The full per-country recommendation list is on this page below.
Q08

How do I cite Voidly's data on Iran in a paper or article?

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Use the BibTeX or RIS export at https://voidly.ai/cite/IR (also linked from the Citation section below). Permanent incident IDs (e.g., IR-2026-NNNN) are issued for every confirmed event. License: CC BY 4.0 — credit Voidly Research and link back.

Cite this data

Voidly Research. (2026). Iran Censorship Profile. https://voidly.ai/ir

License: CC BY 4.0 — free to use with attribution.

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