Active Incident
Confirmed: historical blocking: MM 2021-02-23 to 2021-02-26
Myanmar · February 23, 2021 · 4 days
Backfilled from OONI historical archive. 4 anomalous day(s), 8 measurements, 69% anomaly rate. Signal types: block, interference. Signal levels: critical.
Evidence
69%
Anomaly Rate
8
Measurements
86%
Confidence
What This Means
69% of 8 network tests from Myanmar failed to reach these services. Global baseline failure rate is typically 1-3%. This 66+ percentage point difference strongly indicates intentional blocking.
How We Detected This
Data Sourceooni-historical-backfill
ML ModelGradientBoosting v3.3 (LOCO median F1 0.87, honest across 127 countries)
Confidence Score86% certainty of censorship
Detection TimeFebruary 23, 2021
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.
- 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.
Cite This Incident
Voidly Research. (2021). Confirmed: historical blocking: MM 2021-02-23 to 2021-02-26 [MM-2021-0032]. Voidly Global Censorship Index. https://voidly.ai/incident/MM-2021-0032
Related
Related incidents
More in Myanmar
Internet connectivity disruption in Myanmar
2026-06-20 · Infrastructure outage
Internet censorship detected in Myanmar
2026-06-18 · TCP/RST injection
Internet censorship detected in Myanmar
2026-06-17 · TCP/RST injection
Internet censorship detected in Myanmar
2026-06-16 · TCP/RST injection
Internet censorship detected in Myanmar
2026-06-15 · TCP/RST injection
Internet censorship detected in Myanmar
2026-06-14 · TCP/RST injection
Same mechanism · dns-blocking
Historical blocking: MM 2021-05-03
2021-05-03 · dns-blocking
Historical blocking: MM 2021-04-26 to 2021-04-28
2021-04-26 · dns-blocking
Historical blocking: MM 2021-04-22 to 2021-04-23
2021-04-22 · dns-blocking
Historical blocking: MM 2021-04-19
2021-04-19 · dns-blocking
Historical blocking: MM 2021-04-05 to 2021-04-10
2021-04-05 · dns-blocking