California had 28 area codes at the beginning of 2010, with more proposed.
There are several area codes which cover the state of California, such as 213 for downtown Los Angeles. Similarly, much of San Francisco is covered by the area code 415.
OK. States don't have Zip Codes. Cities have Zip Codes. You can get the complete list of ZIP codes in California under different Cities from here: http://www.zip4all.com/california/ca/ .
The California area codes have the densest populations would be Los Angeles, the Bay Area and San Jose. These cities are on the same level in density as New York.
El Segundo, California, is in area codes +1 310 and +1 424 (overlay).
If your talking about Hollywood, California, the area codes are 323 & 310.
Burbank, California, is in area code 818, with overlay code 747.
Tustin, CA, is divided between area codes 714 and 949.
In the United States, the states with the most area codes are:California (30 area codes, will be 31 as of 2012-11-20)Texas (24 area codes)Florida (17 area codes)New York (15 area codes)Illinois (13 area codes, with three more planned for 2013)When area codes were first introduced in 1947, California had 3, Texas had 4, Florida had only 1, New York had 5, and Illinois had 4.
There are several states with a dozen or more area codes. California has the most, with 30 already and the 31st coming on Nov. 20, 2012.
Mar Vista, California, is in area codes 310 and 424 (overlay).
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