Website Availability in Turkey
Submarine cables, ISP health and blocking risks that decide whether a website loads in Turkey. Checked against live measurement data.
Wondering whether a website is down for everyone or just unreachable from Turkey? The answer usually hides in the physical layer of the internet. Turkey 🇹🇷 connects to the global network through 6 submarine cable systems that come ashore at 6 landing stations, and its national domain zone is .tr. Every request from a user in Turkey to a foreign server, and every request from abroad to a site hosted in Turkey, physically travels over these systems or their terrestrial backhaul.
This page summarizes what our measurement network knows about internet connectivity in Turkey: 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 Turkey
As of our latest hourly measurement cycle, the national internet signal of Turkey is operating normally (BGP visibility and active probing dip: 0% 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 Turkey is provided by a small group of networks:
| Provider | ASN | Share of users | Status |
|---|---|---|---|
| TTNet - Turk Telekomunikasyon Anonim Sirketi | AS9121 | 38.3% | No recent anomaly |
| TELLCOM-AS - Superonline Iletisim Hizmetleri A.S. | AS34984 | 13% | No recent anomaly |
| TURKCELL-AS - TURKCELL ILETISIM HIZMETLERI A.S. | AS16135 | 8.4% | No recent anomaly |
| TT_Mobil - TT Mobil Iletisim Hizmetleri A.S | AS20978 | 7.3% | No recent anomaly |
| VodafoneTurkey - Vodafone Telekomunikasyon A.S. | AS15897 | 7.2% | 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 Turkey to the internet
The following systems land in Turkey. 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 2 latency anomalies on cables serving Turkey in the last 30 days.
| Cable system | Length | In service since |
|---|---|---|
| SeaMeWe-5 | 20,000 km | 2016 |
| MedNautilus Submarine System | 7,000 km | 2001 |
| Kardesa | 1,385 km | 2027 |
| KAFOS | 538 km | 1997 |
| Turcyos-2 | 213 km | 2011 |
| Turcyos-1 | 110 km | 1993 |
How resilient is Turkey to cable failures?
With 6 cable systems across 6 landing stations, Turkey 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 Turkey
When a site works in other countries but fails in Turkey, the usual suspects are, in order of likelihood: a DNS problem inside a local ISP, a content delivery network misrouting users in Turkey 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 have not flagged systematic national filtering in Turkey, although individual ISPs and corporate networks can still block specific resources.
Neighbors on the same cables
These countries share submarine cable systems with Turkey, so a major cable incident can affect them together:
🇮🇹 Italy (2 shared) · 🇪🇬 Egypt (1 shared) · 🇮🇩 Indonesia (1 shared) · 🇦🇪 United Arab Emirates (1 shared) · 🇲🇾 Malaysia (1 shared) · 🇫🇷 France (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 Turkey?
Enter the URL into the free Global Availability Checker on this site. It compares measurement data from 80+ countries, including probes relevant to Turkey, and shows in seconds whether the site is down everywhere or only unreachable from specific regions.
How many submarine cables connect Turkey?
Turkey is served by 6 submarine cable systems landing at 6 coastal stations. The longest systems are SeaMeWe-5, MedNautilus Submarine System, Kardesa.
Why does a website work in other countries but not in Turkey?
The most common causes are DNS failures inside a local ISP, CDN edge problems, routing issues between Turkey 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 Turkey?
The leading networks by user share are TTNet - Turk Telekomunikasyon Anonim Sirketi, TELLCOM-AS - Superonline Iletisim Hizmetleri A.S., TURKCELL-AS - TURKCELL ILETISIM HIZMETLERI A.S.. Together they carry the majority of consumer traffic, so a problem inside any of them affects a large share of users in Turkey.
Can a single cable failure disconnect Turkey?
A full disconnect is unlikely, but a fault on a major system can noticeably slow international traffic.
Does Turkey block websites?
We have not detected systematic national filtering in Turkey, but individual ISPs and corporate networks can still block specific sites.
Data: GeoCables submarine cable telemetry, RIPE Atlas measurements, IODA national signals, APNIC user estimates. Numbers refresh automatically; last update July 11, 2026.