Internet outage in Vietnam

Active Incident

Vietnam · March 19, 2026 · 2 hours

IODA detected significant connectivity drop in Vietnam. 2 critical alerts recorded.

Evidence

21%

Anomaly Rate

2

Measurements

67%

Confidence

21% of tests showed anomalies, above the typical 1-3% baseline. This suggests potential network interference.

Data Sourceioda

ML ModelGradientBoosting v3.3 (LOCO median F1 0.87, honest across 127 countries)

Confidence Score67% certainty of censorship

Detection TimeMarch 19, 2026

Evidence collected from multiple independent sources. Upstream claims shown in quotes are not Voidly assertions.

IODAInternet Outage Detection & Analysis2 records

outage

"IODA detected critical level outage for Ha Tinh"— IODA report

Signal value: 0.20

Mar 19, 2026

outage

"IODA detected critical level outage for Quảng Bình"— IODA report

Signal value: 0.22

Mar 19, 2026

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.

Voidly Research. (2026). Internet outage in Vietnam [VN-2026-0063]. Voidly Global Censorship Index. https://voidly.ai/incident/VN-2026-0063