Website Availability in Spain
Submarine cables, ISP health and blocking risks that decide whether a website loads in Spain. Checked against live measurement data.
Wondering whether a website is down for everyone or just unreachable from Spain? The answer usually hides in the physical layer of the internet. Spain 🇪🇸 connects to the global network through 36 submarine cable systems that come ashore at 48 landing stations, and its national domain zone is .es. Every request from a user in Spain to a foreign server, and every request from abroad to a site hosted in Spain, physically travels over these systems or their terrestrial backhaul.
This page summarizes what our measurement network knows about internet connectivity in Spain: 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 Spain
As of our latest hourly measurement cycle, the national internet signal of Spain 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 Spain is provided by a small group of networks:
| Provider | ASN | Share of users | Status |
|---|---|---|---|
| Telefonica_de_EspaNa - TELEFONICA DE ESPANA S.A.U. | AS3352 | 27.5% | No recent anomaly |
| UNI2-AS - Orange Espagne SA | AS12479 | 18.8% | No recent anomaly |
| AS15704 - XTRA TELECOM S.A. | AS15704 | 12.7% | No recent anomaly |
| DIGI-ES - DIGI SPAIN TELECOM S.A | AS57269 | 12.6% | No recent anomaly |
| VODAFONE_ES - VODAFONE ESPANA S.A.U. | AS12430 | 10.9% | 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 Spain to the internet
The following systems land in Spain. 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 12 latency anomalies on cables serving Spain in the last 30 days.
| Cable system | Length | In service since |
|---|---|---|
| 2Africa | 45,000 km | 2024 |
| FLAG Europe-Asia (FEA) | 28,000 km | 1997 |
| Africa Coast to Europe (ACE) | 17,000 km | 2012 |
| West Africa Cable System (WACS) | 14,530 km | 2012 |
| SAT-3/WASC | 14,350 km | 2002 |
| Medusa Submarine Cable System | 8,760 km | 2026 |
| Sol | 8,153 km | 2027 |
| Grace Hopper | 7,191 km | 2022 |
| Anjana | 7,121 km | 2026 |
| MAREA | 6,605 km | 2018 |
| Tata TGN-Western Europe | 3,578 km | 2002 |
| Canalink | 1,835 km | 2011 |
Plus 24 more systems, mostly regional links. Live health data for every cable is available on the linked pages.
How resilient is Spain to cable failures?
With 36 cable systems across 48 landing stations, Spain has one of the most redundant internet connections in the world. Traffic can reroute across many independent systems, so a single cable fault rarely affects end users. 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 Spain
When a site works in other countries but fails in Spain, the usual suspects are, in order of likelihood: a DNS problem inside a local ISP, a content delivery network misrouting users in Spain 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 Spain, although individual ISPs and corporate networks can still block specific resources.
Neighbors on the same cables
These countries share submarine cable systems with Spain, so a major cable incident can affect them together:
🇳🇬 Nigeria (4 shared) · 🇿🇦 South Africa (4 shared) · 🇬🇧 United Kingdom (4 shared) · 🇮🇹 Italy (4 shared) · 🇫🇷 France (4 shared) · 🇺🇸 United States (4 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 Spain?
Enter the URL into the free Global Availability Checker on this site. It compares measurement data from 80+ countries, including probes relevant to Spain, and shows in seconds whether the site is down everywhere or only unreachable from specific regions.
How many submarine cables connect Spain?
Spain is served by 36 submarine cable systems landing at 48 coastal stations. The longest systems are 2Africa, FLAG Europe-Asia (FEA), Africa Coast to Europe (ACE).
Why does a website work in other countries but not in Spain?
The most common causes are DNS failures inside a local ISP, CDN edge problems, routing issues between Spain 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 Spain?
The leading networks by user share are Telefonica_de_EspaNa - TELEFONICA DE ESPANA S.A.U., UNI2-AS - Orange Espagne SA, AS15704 - XTRA TELECOM S.A.. Together they carry the majority of consumer traffic, so a problem inside any of them affects a large share of users in Spain.
Can a single cable failure disconnect Spain?
No. With 36 independent cable systems, traffic reroutes automatically around a single fault.
Does Spain block websites?
We have not detected systematic national filtering in Spain, 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.