Since a large portion of the internet depends on AWS, the outage cascaded across major firms in disparate industries, leaving some people unable to access airline information or make everyday purchases, Qi Liao, a professor of computer science at Central Michigan University, told ABC News.

The outage affected websites like Coinbase and Fortnite, and disrupted services like Signal, Zoom, and Amazon's own products, including Ring.

Since its brief June war with Israel, Iran has throttled internet traffic and jammed GPS, making day-to-day tasks online a struggle and prompting Iranians’ fears of greater surveillance.