Website Availability in Ukraine
Submarine cables, ISP health and blocking risks that decide whether a website loads in Ukraine. Checked against live measurement data.
Wondering whether a website is down for everyone or just unreachable from Ukraine? The answer usually hides in the physical layer of the internet. Ukraine 🇺🇦 connects to the global network through 3 submarine cable systems that come ashore at 3 landing stations, and its national domain zone is .ua. Every request from a user in Ukraine to a foreign server, and every request from abroad to a site hosted in Ukraine, physically travels over these systems or their terrestrial backhaul.
This page summarizes what our measurement network knows about internet connectivity in Ukraine: which cables serve the country, how its leading internet providers are performing, and what can make a website appear offline for users there while it works everywhere else.
Current connectivity status in Ukraine
As of our latest hourly measurement cycle, the national internet signal of Ukraine is operating normally (BGP visibility and active probing dip: 0.1% against the 24-hour baseline). National-level signals catch large events; an individual website can still be unreachable for local reasons, which is what the availability checker above is for.
Connectivity for most users in Ukraine is provided by a small group of networks:
| Provider | ASN | Share of users | Status |
|---|---|---|---|
| KSNET-AS - Kyivstar PJSC | AS15895 | 18.7% | No recent anomaly |
| UMC-AS - PrJSC VF UKRAINE | AS21497 | 8.7% | No recent anomaly |
| LIFECELL-AS - Limited Liability Company lifecell | AS34058 | 4.4% | No recent anomaly |
| TRIOLAN - CONTENT DELIVERY NETWORK LTD | AS13188 | 2.5% | No recent anomaly |
| UKRTELNET - JSC Ukrtelecom | AS6849 | 2.4% | No recent anomaly |
If a website fails to load only for customers of one of these providers, the problem is almost always local: DNS resolution inside that network, ISP-level filtering, or a routing issue, rather than the website itself being down.
Submarine cables that connect Ukraine to the internet
The following systems land in Ukraine. Cable length is a rough proxy for how much of the world a system reaches: long trunks connect continents, short ones link neighbors. Our monitors registered no significant latency anomalies on these systems in the last 30 days.
| Cable system | Length | In service since |
|---|---|---|
| Kardesa | 1,385 km | 2027 |
| Kerch Strait Cable | 46 km | 2014 |
| Energy Bridge Cable | 13 km | 2017 |
How resilient is Ukraine to cable failures?
With 3 cable systems across 3 landing stations, Ukraine has a moderately concentrated topology. A fault on one of the main systems can noticeably degrade international bandwidth until repairs finish. Repairs at sea typically take one to several weeks, because a specialized cable ship has to locate the fault, lift the cable and splice it on deck.
Why a website may not load in Ukraine
When a site works in other countries but fails in Ukraine, the usual suspects are, in order of likelihood: a DNS problem inside a local ISP, a content delivery network misrouting users in Ukraine to an unhealthy edge node, a routing or peering issue between local networks and the site's host, and finally a submarine cable incident affecting the whole region.
Our DNS measurements show clean resolution in Ukraine: no signs of systematic national filtering. If a site is unreachable there, the cause is almost certainly technical rather than administrative.
Neighbors on the same cables
These countries share submarine cable systems with Ukraine, so a major cable incident can affect them together:
🇷🇺 Russia (2 shared) · 🇹🇷 Turkey (1 shared)
See the full list on the website availability by country hub.
Frequently asked questions
How do I check if a website is down in Ukraine?
Enter the URL into the free Global Availability Checker on this site. It compares measurement data from 80+ countries, including probes relevant to Ukraine, and shows in seconds whether the site is down everywhere or only unreachable from specific regions.
How many submarine cables connect Ukraine?
Ukraine is served by 3 submarine cable systems landing at 3 coastal stations. The longest systems are Kardesa, Kerch Strait Cable, Energy Bridge Cable.
Why does a website work in other countries but not in Ukraine?
The most common causes are DNS failures inside a local ISP, CDN edge problems, routing issues between Ukraine and the hosting network, national filtering, and submarine cable faults. Testing the URL from multiple countries immediately narrows down which one it is.
Who are the largest internet providers in Ukraine?
The leading networks by user share are KSNET-AS - Kyivstar PJSC, UMC-AS - PrJSC VF UKRAINE, LIFECELL-AS - Limited Liability Company lifecell. Together they carry the majority of consumer traffic, so a problem inside any of them affects a large share of users in Ukraine.
Can a single cable failure disconnect Ukraine?
A full disconnect is unlikely, but a fault on a major system can noticeably slow international traffic.
Does Ukraine block websites?
Our measurements show clean DNS resolution in Ukraine with no signs of systematic national filtering.
Data: GeoCables submarine cable telemetry, RIPE Atlas measurements, IODA national signals, APNIC user estimates. Numbers refresh automatically; last update July 11, 2026.