California had 28 area codes at the beginning of 2010, with more proposed.
Saskatchewan
Texas has 24, but California has 30.
There are many postal codes and STD Codes (telephone area codes) in the state of Tamil Nadu. Please be more specific.
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.
Mexico has about 400 area codes. Ask a more specific question.
The United States has about 300 area codes. Ask a more specific question.
California has 31, with #32 scheduled for 2015. Texas has 26.
There are currently 10 area codes in Ohio. When Ohio needs more area codes they will introduce an eleventh area code for the Columbus/Central Ohio area and a twelfth area code for the Cincinnati region.
There are several dozen area codes in Brazil. Please be more specific.
Country code +1, area codes 214, 972, and 469, with several more area codes for outer suburbs and other nearby areas.
Area codes are for states and the cities within them. The area code (865) is for part of the state of Tennessee and covers 62 cities. That is at least 62 zip codes if not more.
In the United States, telephone area codes do not cross state lines. However, within a state, there are many cases where a telephone area code boundary divides a city or town between two or more area codes. The only states left that have only one area code each are Alaska, Hawaii, Idaho, Montana, Wyoming, North Dakota, South Dakota, Delaware, Rhode Island, Vermont, New Hampshire, and Maine. In addition, the entire state of West Virginia is an overlay; although there are two area codes, there is no boundary between them, since they both serve the entire state. The first area code overlay in the United States was area code 917 for New York City. In the original plan, 917 was to be the area code for mobile phones and pagers, with mobile users in the 212 and 718 area codes (then the only two area codes for New York City) forced to move their numbers to 917. However, federal regulators held that it was illegal to discriminate on the basis of class of service (i.e., landline versus cellphone, etc.) in deciding who got the desirable 212 and 718 numbers and who got the less-desirable 917 numbers. The next overlays in the United States were in Maryland in 1997. However, since 2007, there have been no area code splits, only overlays. Canada has had only overlays since 1999. Thus, there are more and more parts of the North American Numbering Plan (the area code system that serves the USA, Canada, and 18 assorted island nations and territories, mostly in the Caribbean) that have two or more area codes for the same location.