OONI, an international nonprofit, relies on volunteers around the world to install a program that probes for which types of internet use are being censored and how. Its data showed that ETECSA began blocking WhatsApp on Sunday night, then Signal and Telegram on Monday. All three were still blocked on Tuesday, Filasto said. "We have never seen instant messaging apps being blocked in the country," he said. "It's sort of unprecedented that we would see such a heavy crackdown on the internet in Cuba." Marianne Diaz Hernandez, a fellow at the digital rights nonprofit Access Now, said some Cubans have reported that their specific SIM cards for their phones have been rendered useless, keeping them offline. And some virtual private networks have themselves been blocked, she said. Two major VPNs, Tor and Psiphon, appear to still work. While Cuba has deployed various censorship techniques in the past, this is the first time they have all been deployed at the same time, Hernandez said. "Since they have had internet, this is the largest blackout in history," she said.On Tuesday, Gov. Ron DeSantis said he wants Florida companies to provide internet connection to residents in Cuba. "What does the regime do when you start to see these images? They shut down the internet. They don't want the truth to be out, they don't want people to be able to communicate," said DeSantis during a roundtable with Republican lawmakers and members of the Cuban exile community in Miami. "And so one of the things I think we should be able to do with our private companies or with the United States is to provide some of that internet via satellite. We have companies on the Space Coast that launch these things," he added. DeSantis said he would make some calls to "see what are the options" to make it happen.