# Sustained censorship in TH (2026-02)

**Country:** 🇹🇭 Thailand (TH)
**Date:** 2026-02-09
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

OONI detected 9 days of elevated network interference averaging 63.5% anomaly rate.

## Metrics

- Confidence: 72%
- Measurements: 9
- Anomaly Rate: 63.5%

## Evidence

- **OONI** (measurement): OONI whatsapp: 12/21 measurements anomalous (57.1%)
  - Observed: 2026-02-20
  - Confidence: 73%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=whatsapp&since=2026-02-20&until=2026-02-21&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 14/25 measurements anomalous (56.0%)
  - Observed: 2026-02-20
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=whatsapp&since=2026-02-20&until=2026-02-21&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 17/23 measurements anomalous (73.9%)
  - Observed: 2026-02-20
  - Confidence: 80%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=whatsapp&since=2026-02-20&until=2026-02-21&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 11/22 measurements anomalous (50.0%)
  - Observed: 2026-02-20
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-02-20&until=2026-02-21&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 7/10 measurements anomalous (70.0%)
  - Observed: 2026-02-19
  - Confidence: 78%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=whatsapp&since=2026-02-19&until=2026-02-20&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 9/17 measurements anomalous (52.9%)
  - Observed: 2026-02-19
  - Confidence: 71%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=whatsapp&since=2026-02-19&until=2026-02-20&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 13/22 measurements anomalous (59.1%)
  - Observed: 2026-02-19
  - Confidence: 74%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=whatsapp&since=2026-02-19&until=2026-02-20&only=anomalies)
- **OONI** (measurement): OONI whatsapp: 11/21 measurements anomalous (52.4%)
  - Observed: 2026-02-19
  - Confidence: 71%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=whatsapp&since=2026-02-19&until=2026-02-20&only=anomalies)
- **OONI** (measurement): OONI facebook_messenger: 1/1 measurements anomalous (100.0%)
  - Observed: 2026-02-09
  - Confidence: 90%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=facebook_messenger&since=2026-02-09&until=2026-02-10&only=anomalies)

## 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.
- **Sub-national scope** — measurement is aggregated at the country level; we cannot localize to a province, city, or network segment.
- **Independent corroboration** — this rests on a single source; treat it as a single-source signal, not a multi-source confirmation.

## Data Sources

ooni

## Citation

Voidly Research. (2026). Sustained censorship in TH (2026-02) [TH-2026-0155]. Retrieved from https://voidly.ai/incident/TH-2026-0155

---
*Report generated by Voidly Research on 2026-08-06*
*Data licensed under CC BY 4.0*
*Incident ID: TH-2026-0155*
*Permalink: https://voidly.ai/incident/TH-2026-0155*