Migliano said his estimates were calculated using the abruptly cut off communications on the night of Jan. 8 amid widespread protests against the clerical regime.
While officials later restored much of the country’s domestic bandwidth, as well as local and international phone calls and SMS messaging, the population is largely unable to freely access the internet because of heavy state filtering.
"The recent 579% surge in VPN demand reflects a scramble for digital survival," Migliano said before describing how even when access is briefly restored, the internet remains "heavily censored and effectively unusable without circumvention tools such as VPNs."
"We can see spikes showing that as soon as connectivity returned, users immediately sought VPNs to reach sites and services outside the state-controlled network, including global platforms such as WhatsApp and Telegram that remain otherwise inaccessible," he added.
"Sustained demand — averaging 427% above normal levels — indicates Iranians are stockpiling circumvention tools in anticipation of further blackouts," Migliano said.
"The usual strategy is to download as many free tools as possible and cycle between them. It becomes a cat-and-mouse game, as the government blocks individual VPN servers and providers rotate IP addresses to stay ahead of the censors," he added.
Iran’s minister of information and communications technology, Sattar Hashemi, acknowledged the economic toll caused by the blackout tactics.
He said recent outages were inflicting roughly "5,000 billion rials" a day in losses to the digital economy and nearly 50 trillion rials on the wider economy, according to Iran International.
"Iran’s three-week internet blackout may have been lifted, but connectivity remains severely disrupted still," Migliano claimed.
"Access is still heavily filtered. It is restricted to a government-approved ‘whitelist’ of sites and apps and the connection itself remains highly unstable throughout the day," he added.