That one is more likely to have been on purpose, like the "555" telephone numbers. That movie is from a time when using IP addresses directly was more common, a

That one is more likely to have been on purpose, like the "555" telephone numbers. That movie is from a time when using IP addresses directly was more common, and they probably wanted to avoid problems in case the number they chose was in use for something. Nowadays we have RFC 5737, one of its networks being already available in RFC 3330, but the film is from half a decade earlier.