Website Availability in Brazil

Website Availability in Brazil

Submarine cables, ISP health and blocking risks that decide whether a website loads in Brazil. Checked against live measurement data.

Wondering whether a website is down for everyone or just unreachable from Brazil? The answer usually hides in the physical layer of the internet. Brazil 🇧🇷 connects to the global network through 26 submarine cable systems that come ashore at 74 landing stations, and its national domain zone is .br. Every request from a user in Brazil to a foreign server, and every request from abroad to a site hosted in Brazil, physically travels over these systems or their terrestrial backhaul.

This page summarizes what our measurement network knows about internet connectivity in Brazil: 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 Brazil

As of our latest hourly measurement cycle, the national internet signal of Brazil is operating normally (BGP visibility and active probing dip: 0.2% 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 Brazil is provided by a small group of networks:

ProviderASNShare of usersStatus
AS28573 - Claro NXT Telecomunicacoes LtdaAS2857312.7%No recent anomaly
AS26599 - TELEFONICA BRASIL S.AAS265997.9%No recent anomaly
AS27699 - TELEFONICA BRASIL S.AAS276993.3%No recent anomaly
AS26615 - TIM S/AAS266153.3%No recent anomaly
AS7738 - V talAS77382.8%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 Brazil to the internet

The following systems land in Brazil. 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 systemLengthIn service since
Project Waterworth50,000 kmn/a
South America-1 (SAm-1)25,000 km2001
GlobeNet23,500 km2000
South American Crossing (SAC)20,000 km2000
America Movil Submarine Cable System-1 (AMX-1)17,800 km2014
Firmina14,517 km2026
BRUSA11,000 km2018
Seabras-110,800 km2017
Monet10,556 km2017
EllaLink6,200 km2021
South Atlantic Cable System (SACS)6,165 km2018
South Atlantic Inter Link (SAIL)5,800 km2020

Plus 14 more systems, mostly regional links. Live health data for every cable is available on the linked pages.

How resilient is Brazil to cable failures?

With 26 cable systems across 74 landing stations, Brazil 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 Brazil

When a site works in other countries but fails in Brazil, the usual suspects are, in order of likelihood: a DNS problem inside a local ISP, a content delivery network misrouting users in Brazil 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 Brazil, although individual ISPs and corporate networks can still block specific resources.

Neighbors on the same cables

These countries share submarine cable systems with Brazil, so a major cable incident can affect them together:

🇺🇸 United States (8 shared) · 🇦🇷 Argentina (5 shared) · 🇲🇽 Mexico (1 shared) · 🇿🇦 South Africa (1 shared) · 🇮🇳 India (1 shared) · 🇦🇺 Australia (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 Brazil?

Enter the URL into the free Global Availability Checker on this site. It compares measurement data from 80+ countries, including probes relevant to Brazil, and shows in seconds whether the site is down everywhere or only unreachable from specific regions.

How many submarine cables connect Brazil?

Brazil is served by 26 submarine cable systems landing at 74 coastal stations. The longest systems are Project Waterworth, South America-1 (SAm-1), GlobeNet.

Why does a website work in other countries but not in Brazil?

The most common causes are DNS failures inside a local ISP, CDN edge problems, routing issues between Brazil 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 Brazil?

The leading networks by user share are AS28573 - Claro NXT Telecomunicacoes Ltda, AS26599 - TELEFONICA BRASIL S.A, AS27699 - TELEFONICA BRASIL S.A. Together they carry the majority of consumer traffic, so a problem inside any of them affects a large share of users in Brazil.

Can a single cable failure disconnect Brazil?

No. With 26 independent cable systems, traffic reroutes automatically around a single fault.

Does Brazil block websites?

We have not detected systematic national filtering in Brazil, 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.