The time period - firmly set in the 2014 era, with internet hacking and smartphones - was intertwined with props from a previous era - with cassette recorders and landline telephones. This was done on purpose, as director Eubanks felt the addition of "old tech" works as a possible misdirect.
Misdirection is a key ingredient in the film. Director Eubanks wanted the viewer to continually feel they nearly have a grip on where the film is going; only to have their notions fall apart when the direction changes again - all the way to the very end.
Early in the movie, while in a motel room, an old b&w movie is playing. It's 1959s Teenagers From Outer Space.
The IP address that Nic and Jonah use to trace Nomad's location in Nevada, 192.117.255.147, actually belongs to "SMILE - Internet Gold" which is one of Israel's largest communication companies that provides web connectivity to thousands of subscribers, in both business and residential environments.
Olivia Cooke's debut.