Network data from NetBlocks confirm a significant disruption to internet service in Kharkiv, Ukraine’s second largest city on the morning of Thursday 24 February 2022.
⚠️ Confirmed: Significant internet disruption registered in #Ukraine-controlled city of #Kharkiv shortly after huge explosions heard; users report loss of fixed-line service on provider Triolan while cellphones continue to work 📉
📰 Live Report: https://t.co/S0qJQ7CbNv pic.twitter.com/cVSJg2XtQf
— NetBlocks (@netblocks) February 24, 2022
Metrics show a loss of connectivity on the Triolan network, corroborating user reports of loss of fixed-line service. The disruption began amid reports of huge explosions in the region as Russia announces a military mobilization, and have intensified over the course of the day.
⚠️ Update: #Ukraine‘s second-largest city #Kharkiv continues to take the brunt of network and telecoms disruptions, leaving many users cut off amid scenes of destruction as Russia targets the region. Kyiv is currently less impacted by outages.
📰 Report: https://t.co/S0qJQ7CJD3 pic.twitter.com/FxgN1bHV3m
— NetBlocks (@netblocks) February 24, 2022
Later in the day, a significant internet disruption was registered in the strategic port city of Mariupol, Donetsk. The incident came amid reports of civilian casualties and the loss of telecoms services for many subscribers:
⚠️ Update: A significant internet disruption has been registered in the strategic port city of #Mariupol, Donetsk. The incident comes amid reports of civilian casualties and the loss of telecoms services for many.
📰 Report: https://t.co/S0qJQ7CbNv pic.twitter.com/sa2jhSyHyW
— NetBlocks (@netblocks) February 24, 2022
Work is ongoing to assess the present incident and its context. Telecoms disruptions in Ukraine have so far been attributed to power outages, cyberattacks, sabotage, and kinetic impacts.
What’s happening in Ukraine?
Russian leader Vladimir Putin announced military mobilization on Thursday morning, and cruise missile strikes were launched on Kyiv, while troops moved into Kharkiv about 25 miles from the Russian border. As the security situation deteriorated through the morning authorities advised civilians to get off the streets and seek shelter.
Previously:
Methodology
NetBlocks diffscans, which map the IP address space of a country in real time, show internet connectivity levels and corresponding outages. Purposeful internet outages may have a distinct network pattern used by NetBlocks to determine and attribute the root cause of an outage, a process known as attribution which follows detection and classification stages.
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