Where is Area Code 749? Unlike Burbank, crime in the Glendale is fairly high. View all phone prefixes used in area code 747 or other area codes in California.Included with the location of each prefix are the phone companies / service providers that operates them. Area Code 717 is in Pennsylvania and covers 6497.35 square miles. Area Code Tools Area code 818 was created in a split from area code 213 on January 7, 1984.