 FACT: When Samantha Taylor uses the operator to phone home, she asks  for a number in the 275 prefix in LA (which was all 213 area code at  the time). Although George Webber home is clearly located in Malibu,  the 275 prefix in the late 70s was located in Beverly Hills.  Additionally, the film doesnt use the now standard convention of  unassigned "555" prefix phone numbers, and gives an entire seven  digit number 