oh shnikeeez, ---->"On April 24, 2008, the CPUC decided that area code 747 will overlay area code 818 effective May 18, 2009.[2] On that date, new numbers may be assigned to the new area code. Callers within the 818 and 747 area codes will be required to dial the area code (including calls to the same area code) for all calls. There will be a grace period starting October 11, 2008 during which callers can still complete calls using the 7-digit number. Beginning April 18, 2009, calls must be dialed with the area code or they will not be completed." - Wikipedia
more info http://www.westlakerevelations.com/?q=node/112
http://en.wikipedia.org/wiki/Area_codes_747_and_818
REPROGRAM ALL YOUR 818 numbers