Internet outage history

Czechia

Operational 20/20 hosts up since Oct 16, 2026 10:00 UTC

Every disruption Blackout Map has recorded in Czechia since monitoring began on October 16, 2026, with reported government shutdowns and submarine cable incidents.

Live status of Czechia RSS feed

Regions right now Operational Degraded Partial outage Blackout Each dot is a state or province we measure separately, coloured by its status now; bigger dots have more hosts. The country is shaded in its overall status.

0incidents recorded

0total disruption

—longest incident

11outages measured since 2022

0reported shutdowns since 2019

Overview

Last 90 days

Worst status per day, last 90 days

Aug 1, 2026 Operational Degraded Partial outage Blackout Not monitored yet Today

Daily reachability

last 30 days

Hosts uplowest hour

Our probes · hosts reachable

last 72 hours

IODA · routes and active probing, % of normal

last 72 hours

BGP routesActive probingIODA (Georgia Tech)

Latency from our server (Germany)

last 72 hours

Latency25–75%

The same measurements as the live panel, per 30 minutes. Times in UTC.

Incidents

All incidents

our probes and IODA

No disruptions recorded in Czechia since monitoring started on October 16, 2026.

Attacks and context

Context only — they don't change the status above.

DDoS attacks aimed at Czechia · 7 days

Network DDoSWeb attacksCloudflare Radar

Per hour; each line is relative to its own busiest hour of the week (100%). Context only — attacks never change a country's status.

Types: UDP Flood 40% · Mirai (UDP) Flood 23% · SYN Flood 15% · DNS Amplification 9%
Duration: 65% longer than 1 h · 23% under 20 min
Size: 95% under 500 Mbit/s · 0% over 10 Gbit/s
Web attacks from: O2 Czech Republic, a.s. 11% · Vodafone Czech Republic a.s. 10% · Mastersoft S.R.L. 8%

Routing incidents · 7 days · Cloudflare Radar

1 possible hijacks of networks in Czechia, 7+ route leaks involving it.

Oct 25 04:28 AS44712 (CZ) · 1 address blocks · confidence 8/10

Long-term history

Before our monitoring: IODA archive

11 incidents · 5 blackouts · 1 partial outages

Outages in Czechia detected by IODA (Georgia Tech) between January 2022 and the start of our own monitoring: drops in the country's internet routes (BGP) or in its reachability from IODA's active probing, compared with the day before. Each is checked against IODA's signal; small dips are left out.

Started (UTC)	Duration	Worst level	Evidence
Jun 20, 2026 11:40	2 hours	Blackout	IODA (Georgia Tech): active probing, lowest 29% of normal
Aug 10, 2025 07:30	30 min	Degraded	IODA (Georgia Tech): active probing, lowest 83% of normal
Jul 24, 2025 08:50	20 min	Blackout	IODA (Georgia Tech): active probing, lowest 10% of normal
Mar 29, 2025 10:10	3 hours	Blackout	IODA (Georgia Tech): active probing, lowest 29% of normal
Mar 25, 2025 20:10	5 hours	Degraded	IODA (Georgia Tech): active probing, lowest 80% of normal
Mar 25, 2025 17:40	40 min	Degraded	IODA (Georgia Tech): active probing, lowest 88% of normal
Jul 6, 2024 11:00	30 min	Partial outage	IODA (Georgia Tech): active probing, lowest 74% of normal
Nov 19, 2023 12:40	2 hours	Blackout	IODA (Georgia Tech): active probing, lowest 20% of normal
Jul 10, 2023 08:10	37 hours	Degraded	IODA (Georgia Tech): active probing, lowest 85% of normal
Jun 17, 2023 23:40	3 hours	Degraded	IODA (Georgia Tech): active probing, lowest 81% of normal
Jul 2, 2022 05:10	30 min	Blackout	IODA (Georgia Tech): active probing, lowest 42% of normal

Government shutdowns and blocks

since 2019

The Internet Society Pulse tracker has no recorded government shutdowns or blocks in Czechia since 2019.

Provided by Internet Society.

Submarine cable incidents

No submarine cable incidents recorded for Czechia.

Cable incidents: GeoCables (CC BY 4.0). Context only — they never change a country's status.