If you're in the Valley, you'll be dialing 11 numbers to reach your next door neighbor beginning tomorrow when the 747 area code lands. "The 747 area code is only the third overlay in the history of California, where a fourth will take effect later this year in a region stretching from San Diego County to Bishop," notes the Glendale News-Press. The most recent overlay in the Los Angeles area involved the tony 310 area code when 424 was overlayed in 2006. That state has 29 area codes in total.