# Sustained censorship in TZ (2026-10)

**Country:** 🇹🇿 Tanzania (TZ)
**Date:** 2026-10-07
**Type:** Censorship
**Severity:** CRITICAL
**Status:** confirmed

## Summary

OONI detected 19 days of elevated network interference averaging 78.3% anomaly rate.

## Metrics

- Confidence: 80%
- Measurements (stored incident count; not the qualifying evidence count): 19
- Anomaly Rate: 78.3%

## Evidence

- **OONI** (measurement): OONI signal: 1 anomaly + 0 confirmed / 1 nonfailed measurements (100.0% blocked; 0 failed)
  - Observed: 2026-10-09
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-09&until=2026-10-10)
- **OONI** (measurement): OONI telegram: 1 anomaly + 0 confirmed / 1 nonfailed measurements (100.0% blocked; 0 failed)
  - Observed: 2026-10-09
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-09&until=2026-10-10)
- **OONI** (measurement): OONI signal: 5 anomaly + 0 confirmed / 9 nonfailed measurements (55.6% blocked; 0 failed)
  - Observed: 2026-10-09
  - Confidence: 72%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-09&until=2026-10-10)
- **OONI** (measurement): OONI telegram: 9 anomaly + 0 confirmed / 9 nonfailed measurements (100.0% blocked; 0 failed)
  - Observed: 2026-10-09
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-09&until=2026-10-10)
- **OONI** (measurement): OONI signal: 8 anomaly + 0 confirmed / 13 nonfailed measurements (61.5% blocked; 0 failed)
  - Observed: 2026-10-09
  - Confidence: 75%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-09&until=2026-10-10)
- **OONI** (measurement): OONI telegram: 8 anomaly + 0 confirmed / 13 nonfailed measurements (61.5% blocked; 0 failed)
  - Observed: 2026-10-09
  - Confidence: 75%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-09&until=2026-10-10)
- **OONI** (measurement): OONI signal: 7 anomaly + 0 confirmed / 14 nonfailed measurements (50.0% blocked; 0 failed)
  - Observed: 2026-10-08
  - Confidence: 70%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-08&until=2026-10-09)
- **OONI** (measurement): OONI telegram: 8 anomaly + 0 confirmed / 14 nonfailed measurements (57.1% blocked; 0 failed)
  - Observed: 2026-10-08
  - Confidence: 73%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-08&until=2026-10-09)
- **OONI** (measurement): OONI signal: 8 anomaly + 0 confirmed / 9 nonfailed measurements (88.9% blocked; 0 failed)
  - Observed: 2026-10-08
  - Confidence: 86%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-08&until=2026-10-09)
- **OONI** (measurement): OONI telegram: 9 anomaly + 0 confirmed / 9 nonfailed measurements (100.0% blocked; 0 failed)
  - Observed: 2026-10-08
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-08&until=2026-10-09)
- **OONI** (measurement): OONI signal: 9 anomaly + 0 confirmed / 10 nonfailed measurements (90.0% blocked; 0 failed)
  - Observed: 2026-10-08
  - Confidence: 86%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-08&until=2026-10-09)
- **OONI** (measurement): OONI telegram: 10 anomaly + 0 confirmed / 10 nonfailed measurements (100.0% blocked; 0 failed)
  - Observed: 2026-10-08
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-08&until=2026-10-09)
- **OONI** (measurement): OONI signal: 5 anomaly + 0 confirmed / 9 nonfailed measurements (55.6% blocked; 0 failed)
  - Observed: 2026-10-07
  - Confidence: 72%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-07&until=2026-10-08)
- **OONI** (measurement): OONI telegram: 5 anomaly + 0 confirmed / 9 nonfailed measurements (55.6% blocked; 0 failed)
  - Observed: 2026-10-07
  - Confidence: 72%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-07&until=2026-10-08)
- **OONI** (measurement): OONI telegram: 6 anomaly + 0 confirmed / 8 nonfailed measurements (75.0% blocked; 0 failed)
  - Observed: 2026-10-07
  - Confidence: 80%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-07&until=2026-10-08)
- **OONI** (measurement): OONI signal: 10 anomaly + 0 confirmed / 11 nonfailed measurements (90.9% blocked; 0 failed)
  - Observed: 2026-10-07
  - Confidence: 86%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-07&until=2026-10-08)
- **OONI** (measurement): OONI telegram: 12 anomaly + 0 confirmed / 12 nonfailed measurements (100.0% blocked; 0 failed)
  - Observed: 2026-10-07
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-07&until=2026-10-08)
- **OONI** (measurement): OONI signal: 11 anomaly + 0 confirmed / 15 nonfailed measurements (73.3% blocked; 0 failed)
  - Observed: 2026-10-07
  - Confidence: 79%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-07&until=2026-10-08)
- **OONI** (measurement): OONI telegram: 11 anomaly + 0 confirmed / 15 nonfailed measurements (73.3% blocked; 0 failed)
  - Observed: 2026-10-07
  - Confidence: 79%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-07&until=2026-10-08)
- **OONI** (measurement): OONI signal: 9 anomaly + 0 confirmed / 13 nonfailed measurements (69.2% blocked; 0 failed)
  - Observed: 2026-10-06
  - Confidence: 78%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-06&until=2026-10-07)
- **OONI** (measurement): OONI telegram: 10 anomaly + 0 confirmed / 13 nonfailed measurements (76.9% blocked; 0 failed)
  - Observed: 2026-10-06
  - Confidence: 81%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-06&until=2026-10-07)
- **OONI** (measurement): OONI signal: 10 anomaly + 0 confirmed / 11 nonfailed measurements (90.9% blocked; 0 failed)
  - Observed: 2026-10-06
  - Confidence: 86%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-06&until=2026-10-07)
- **OONI** (measurement): OONI telegram: 10 anomaly + 0 confirmed / 10 nonfailed measurements (100.0% blocked; 0 failed)
  - Observed: 2026-10-06
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-06&until=2026-10-07)
- **OONI** (measurement): OONI signal: 8 anomaly + 0 confirmed / 10 nonfailed measurements (80.0% blocked; 0 failed)
  - Observed: 2026-10-06
  - Confidence: 82%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-06&until=2026-10-07)
- **OONI** (measurement): OONI telegram: 8 anomaly + 0 confirmed / 10 nonfailed measurements (80.0% blocked; 0 failed)
  - Observed: 2026-10-06
  - Confidence: 82%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-06&until=2026-10-07)
- **OONI** (measurement): OONI signal: 4 anomaly + 0 confirmed / 8 nonfailed measurements (50.0% blocked; 0 failed)
  - Observed: 2026-10-06
  - Confidence: 70%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-06&until=2026-10-07)
- **OONI** (measurement): OONI signal: 6/12 measurements anomalous (50.0%)
  - Observed: 2026-10-05
  - Confidence: 70%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-05&until=2026-10-06&only=anomalies)
- **OONI** (measurement): OONI telegram: 7/12 measurements anomalous (58.3%)
  - Observed: 2026-10-05
  - Confidence: 73%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-05&until=2026-10-06&only=anomalies)
- **OONI** (measurement): OONI signal: 3/4 measurements anomalous (75.0%)
  - Observed: 2026-10-05
  - Confidence: 80%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-05&until=2026-10-06&only=anomalies)
- **OONI** (measurement): OONI telegram: 3/4 measurements anomalous (75.0%)
  - Observed: 2026-10-05
  - Confidence: 80%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-05&until=2026-10-06&only=anomalies)
- **OONI** (measurement): OONI signal: 7/10 measurements anomalous (70.0%)
  - Observed: 2026-10-05
  - Confidence: 78%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-05&until=2026-10-06&only=anomalies)
- **OONI** (measurement): OONI telegram: 7/10 measurements anomalous (70.0%)
  - Observed: 2026-10-05
  - Confidence: 78%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-05&until=2026-10-06&only=anomalies)
- **OONI** (measurement): OONI signal: 10/11 measurements anomalous (90.9%)
  - Observed: 2026-10-04
  - Confidence: 86%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-04&until=2026-10-05&only=anomalies)
- **OONI** (measurement): OONI telegram: 11/11 measurements anomalous (100.0%)
  - Observed: 2026-10-04
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-04&until=2026-10-05&only=anomalies)
- **OONI** (measurement): OONI signal: 5/7 measurements anomalous (71.4%)
  - Observed: 2026-10-04
  - Confidence: 79%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-04&until=2026-10-05&only=anomalies)
- **OONI** (measurement): OONI telegram: 5/7 measurements anomalous (71.4%)
  - Observed: 2026-10-04
  - Confidence: 79%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-04&until=2026-10-05&only=anomalies)
- **OONI** (measurement): OONI signal: 6/12 measurements anomalous (50.0%)
  - Observed: 2026-10-03
  - Confidence: 70%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-03&until=2026-10-04&only=anomalies)
- **OONI** (measurement): OONI telegram: 6/12 measurements anomalous (50.0%)
  - Observed: 2026-10-03
  - Confidence: 70%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-03&until=2026-10-04&only=anomalies)
- **OONI** (measurement): OONI signal: 6/9 measurements anomalous (66.7%)
  - Observed: 2026-10-03
  - Confidence: 77%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-03&until=2026-10-04&only=anomalies)
- **OONI** (measurement): OONI telegram: 8/9 measurements anomalous (88.9%)
  - Observed: 2026-10-03
  - Confidence: 86%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-03&until=2026-10-04&only=anomalies)
- **OONI** (measurement): OONI signal: 7/8 measurements anomalous (87.5%)
  - Observed: 2026-10-03
  - Confidence: 85%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-03&until=2026-10-04&only=anomalies)
- **OONI** (measurement): OONI telegram: 7/8 measurements anomalous (87.5%)
  - Observed: 2026-10-03
  - Confidence: 85%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-03&until=2026-10-04&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 6/8 measurements anomalous (75.0%)
  - Observed: 2026-10-03
  - Confidence: 80%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=http_invalid_request_line&since=2026-10-03&until=2026-10-04&only=anomalies)
- **OONI** (measurement): OONI telegram: 5/9 measurements anomalous (55.6%)
  - Observed: 2026-10-02
  - Confidence: 72%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-02&until=2026-10-03&only=anomalies)
- **OONI** (measurement): OONI signal: 3/4 measurements anomalous (75.0%)
  - Observed: 2026-10-02
  - Confidence: 80%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-02&until=2026-10-03&only=anomalies)
- **OONI** (measurement): OONI telegram: 4/4 measurements anomalous (100.0%)
  - Observed: 2026-10-02
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-02&until=2026-10-03&only=anomalies)
- **OONI** (measurement): OONI signal: 6/6 measurements anomalous (100.0%)
  - Observed: 2026-10-02
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-02&until=2026-10-03&only=anomalies)
- **OONI** (measurement): OONI telegram: 6/6 measurements anomalous (100.0%)
  - Observed: 2026-10-02
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-02&until=2026-10-03&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 7/11 measurements anomalous (63.6%)
  - Observed: 2026-10-02
  - Confidence: 75%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=http_invalid_request_line&since=2026-10-02&until=2026-10-03&only=anomalies)
- **OONI** (measurement): OONI signal: 7/13 measurements anomalous (53.8%)
  - Observed: 2026-10-01
  - Confidence: 72%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-01&until=2026-10-02&only=anomalies)
- **OONI** (measurement): OONI telegram: 9/13 measurements anomalous (69.2%)
  - Observed: 2026-10-01
  - Confidence: 78%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-01&until=2026-10-02&only=anomalies)
- **OONI** (measurement): OONI signal: 7/10 measurements anomalous (70.0%)
  - Observed: 2026-10-01
  - Confidence: 78%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-01&until=2026-10-02&only=anomalies)
- **OONI** (measurement): OONI telegram: 9/10 measurements anomalous (90.0%)
  - Observed: 2026-10-01
  - Confidence: 86%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-01&until=2026-10-02&only=anomalies)
- **OONI** (measurement): OONI http_invalid_request_line: 5/9 measurements anomalous (55.6%)
  - Observed: 2026-10-01
  - Confidence: 72%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=http_invalid_request_line&since=2026-10-01&until=2026-10-02&only=anomalies)
- **OONI** (measurement): OONI signal: 16/19 measurements anomalous (84.2%)
  - Observed: 2026-10-01
  - Confidence: 84%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-01&until=2026-10-02&only=anomalies)
- **OONI** (measurement): OONI telegram: 18/18 measurements anomalous (100.0%)
  - Observed: 2026-10-01
  - Confidence: 90%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-01&until=2026-10-02&only=anomalies)
- **OONI** (measurement): OONI signal: 11/18 measurements anomalous (61.1%)
  - Observed: 2026-10-01
  - Confidence: 74%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=signal&since=2026-10-01&until=2026-10-02&only=anomalies)
- **OONI** (measurement): OONI telegram: 11/17 measurements anomalous (64.7%)
  - Observed: 2026-10-01
  - Confidence: 76%
  - [OONI Explorer filtered results (not one measurement)](https://explorer.ooni.org/search?probe_cc=TZ&test_name=telegram&since=2026-10-01&until=2026-10-02&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.
- **A confirmed duration** — we report the observation window, not a verified start/stop of any block.
- **Sub-national scope** — measurement is aggregated at the country level; we cannot localize to a province, city, or network segment.
- **Independent corroboration** — fewer than two source labels appear in qualifying linked evidence; stored incident source labels may include quarantined OONI observations.

## Data Sources

ooni

These source labels come from qualifying linked evidence. Historical incident source labels and quarantined observations are excluded; multiple labels alone do not establish independent corroboration.

## Citation

Voidly Research. (2026). Sustained censorship in TZ (2026-10) [TZ-2026-0189]. Retrieved from https://voidly.ai/incident/TZ-2026-0189

---
*Report generated by Voidly Research on 2026-10-09*
*Data licensed under CC BY 4.0*
*Incident ID: TZ-2026-0189*
*Permalink: https://voidly.ai/incident/TZ-2026-0189*