# Sustained censorship in TH (2026-06)

**Country:** 🇹🇭 Thailand (TH)
**Date:** 2026-06-01
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

OONI detected 51 days of elevated network interference averaging 64.0% anomaly rate.

## Metrics

- Confidence: 77%
- Measurements: 51
- Anomaly Rate: 64.0%

## Evidence

- **OONI** (measurement): OONI http_invalid_request_line: 4/7 measurements anomalous (57.1%)
  - Observed: 2026-06-13
  - Confidence: 73%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-13&until=2026-06-13&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 9/14 measurements anomalous (64.3%)
  - Observed: 2026-06-12
  - Confidence: 76%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-12&until=2026-06-12&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 8/12 measurements anomalous (66.7%)
  - Observed: 2026-06-12
  - Confidence: 77%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-12&until=2026-06-12&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 6/12 measurements anomalous (50.0%)
  - Observed: 2026-06-12
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-12&until=2026-06-12&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 7/13 measurements anomalous (53.8%)
  - Observed: 2026-06-11
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-11&until=2026-06-11&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 9/11 measurements anomalous (81.8%)
  - Observed: 2026-06-11
  - Confidence: 83%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-11&until=2026-06-11&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 7/11 measurements anomalous (63.6%)
  - Observed: 2026-06-11
  - Confidence: 75%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-11&until=2026-06-11&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 12/14 measurements anomalous (85.7%)
  - Observed: 2026-06-10
  - Confidence: 84%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-10&until=2026-06-10&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 8/13 measurements anomalous (61.5%)
  - Observed: 2026-06-10
  - Confidence: 75%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-10&until=2026-06-10&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 8/14 measurements anomalous (57.1%)
  - Observed: 2026-06-09
  - Confidence: 73%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-09&until=2026-06-09&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 7/14 measurements anomalous (50.0%)
  - Observed: 2026-06-09
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-09&until=2026-06-09&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 10/16 measurements anomalous (62.5%)
  - Observed: 2026-06-09
  - Confidence: 75%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-09&until=2026-06-09&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 12/19 measurements anomalous (63.2%)
  - Observed: 2026-06-08
  - Confidence: 75%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-08&until=2026-06-08&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 11/19 measurements anomalous (57.9%)
  - Observed: 2026-06-08
  - Confidence: 73%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-08&until=2026-06-08&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 9/18 measurements anomalous (50.0%)
  - Observed: 2026-06-08
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-08&until=2026-06-08&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 11/17 measurements anomalous (64.7%)
  - Observed: 2026-06-07
  - Confidence: 76%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-07&until=2026-06-07&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 11/17 measurements anomalous (64.7%)
  - Observed: 2026-06-07
  - Confidence: 76%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-07&until=2026-06-07&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 6/11 measurements anomalous (54.5%)
  - Observed: 2026-06-07
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-07&until=2026-06-07&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 6/11 measurements anomalous (54.5%)
  - Observed: 2026-06-07
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-07&until=2026-06-07&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 6/8 measurements anomalous (75.0%)
  - Observed: 2026-06-07
  - Confidence: 80%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-07&until=2026-06-07&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 6/8 measurements anomalous (75.0%)
  - Observed: 2026-06-07
  - Confidence: 80%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-07&until=2026-06-07&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 7/9 measurements anomalous (77.8%)
  - Observed: 2026-06-07
  - Confidence: 81%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-07&until=2026-06-07&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 8/9 measurements anomalous (88.9%)
  - Observed: 2026-06-07
  - Confidence: 86%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-07&until=2026-06-07&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 6/10 measurements anomalous (60.0%)
  - Observed: 2026-06-06
  - Confidence: 74%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-06&until=2026-06-06&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 6/10 measurements anomalous (60.0%)
  - Observed: 2026-06-06
  - Confidence: 74%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-06&until=2026-06-06&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 9/17 measurements anomalous (52.9%)
  - Observed: 2026-06-06
  - Confidence: 71%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-06&until=2026-06-06&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 7/9 measurements anomalous (77.8%)
  - Observed: 2026-06-06
  - Confidence: 81%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-06&until=2026-06-06&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 7/9 measurements anomalous (77.8%)
  - Observed: 2026-06-06
  - Confidence: 81%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-06&until=2026-06-06&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 6/10 measurements anomalous (60.0%)
  - Observed: 2026-06-05
  - Confidence: 74%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-05&until=2026-06-05&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 6/10 measurements anomalous (60.0%)
  - Observed: 2026-06-05
  - Confidence: 74%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-05&until=2026-06-05&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 8/11 measurements anomalous (72.7%)
  - Observed: 2026-06-05
  - Confidence: 79%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-05&until=2026-06-05&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 9/11 measurements anomalous (81.8%)
  - Observed: 2026-06-05
  - Confidence: 83%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-05&until=2026-06-05&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 8/12 measurements anomalous (66.7%)
  - Observed: 2026-06-05
  - Confidence: 77%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-05&until=2026-06-05&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 8/12 measurements anomalous (66.7%)
  - Observed: 2026-06-05
  - Confidence: 77%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-05&until=2026-06-05&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 9/17 measurements anomalous (52.9%)
  - Observed: 2026-06-04
  - Confidence: 71%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-04&until=2026-06-04&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 12/18 measurements anomalous (66.7%)
  - Observed: 2026-06-04
  - Confidence: 77%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-04&until=2026-06-04&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 11/18 measurements anomalous (61.1%)
  - Observed: 2026-06-03
  - Confidence: 74%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-03&until=2026-06-03&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 9/18 measurements anomalous (50.0%)
  - Observed: 2026-06-03
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-03&until=2026-06-03&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 6/12 measurements anomalous (50.0%)
  - Observed: 2026-06-02
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-02&until=2026-06-02&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 7/12 measurements anomalous (58.3%)
  - Observed: 2026-06-02
  - Confidence: 73%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-02&until=2026-06-02&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 6/11 measurements anomalous (54.5%)
  - Observed: 2026-06-02
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-02&until=2026-06-02&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 6/11 measurements anomalous (54.5%)
  - Observed: 2026-06-02
  - Confidence: 72%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-02&until=2026-06-02&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 11/16 measurements anomalous (68.8%)
  - Observed: 2026-06-02
  - Confidence: 78%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-02&until=2026-06-02&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 9/14 measurements anomalous (64.3%)
  - Observed: 2026-06-02
  - Confidence: 76%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-02&until=2026-06-02&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 7/14 measurements anomalous (50.0%)
  - Observed: 2026-06-02
  - Confidence: 70%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-02&until=2026-06-02&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 8/12 measurements anomalous (66.7%)
  - Observed: 2026-06-01
  - Confidence: 77%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-01&until=2026-06-01&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 8/12 measurements anomalous (66.7%)
  - Observed: 2026-06-01
  - Confidence: 77%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-01&until=2026-06-01&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 8/11 measurements anomalous (72.7%)
  - Observed: 2026-06-01
  - Confidence: 79%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-01&until=2026-06-01&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 7/11 measurements anomalous (63.6%)
  - Observed: 2026-06-01
  - Confidence: 75%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-01&until=2026-06-01&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 7/9 measurements anomalous (77.8%)
  - Observed: 2026-06-01
  - Confidence: 81%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_invalid_request_line&since=2026-06-01&until=2026-06-01&only=anomalies)
- **OONI** (measurement): OONI http_header_field_manipulation: 6/9 measurements anomalous (66.7%)
  - Observed: 2026-06-01
  - Confidence: 77%
  - [OONI Explorer (independently verifiable)](https://explorer.ooni.org/search?probe_cc=TH&test_name=http_header_field_manipulation&since=2026-06-01&until=2026-06-01&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.
- **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 (2026-06) [TH-2026-0154]. Retrieved from https://voidly.ai/incident/TH-2026-0154

---
*Report generated by Voidly Research on 2026-06-21*
*Data licensed under CC BY 4.0*
*Incident ID: TH-2026-0154*
*Permalink: https://voidly.ai/incident/TH-2026-0154*