The California Public Utilities Commission (CPUC) has approved the addition of the 840 area code to the geographic area served by the 909 area code. For international dialing codes and detailed dialing instructions to California United States, use our drop down boxes at the top of this page or check out our easy-to-use country code … Area Code Listing, by Number The cities listed with each area code are the major cities for that area code; this originated as the city in which the switch computer for that area code … To faciltiate the millions of phone users, the United States of America is divided into regions known as Area Codes, corresponding to particular geographic telephone dialing areas. It has the following active area codes: 619. 951 is a General Purpose Code. Area Code 310 is one of the 269 3-digit telephone area codes in the USA. The overlay will require all calls to be completed using new dialing procedures. On July 17th, 2004 it went into service. Dialing pattern for local calls within the same NPA (area code) is 7D. This is a list of area codes in California with service territory and installation dates.. 209 – Stockton, Modesto, Merced, Turlock; the northern San Joaquin Valley and the central Sierra Nevada range. Sacramento Dial Code: +1 916 California originally had three area codes, 213, 415, and 916 when the numbering system was established in 1947. This area code was assigned on April 1st, 1999. CALIFORNIA CITY, CA Has 3 Area Codes. This process is known as an area code overlay. It covers roughly 8,014,000 unique phone numbers and 9,502,009 individuals near the cities of Los Angeles, San Pedro, and Long Beach. Place Code Country Admin1 Admin2 Admin3; 1: Beverly Hills: 90210: United States: California: Los Angeles 34.09/-118.406: 2: Los Angeles: 90002: United States: California View all zip codes in CA or use the free zip code lookup. San Diego, CA has the following Exchanges (NXX) NPA NXX Usage Company Name NXX Introduced Date ; 619 : 200 : Wireless : New Cingular Wireless Pcs, Llc : 01/25/1998 : Area code 951 serves the state of California. 858. Sacramento Area Code: 916. The 310 Area Code is located in the state of California. California ZIP code map and California ZIP code list. 760. Area Code Map of San Diego, CA. United States Phone Code: 1. By 1951, just four years later, California experienced sufficient growth in population and telephone use to need an additional area code. Area Codes > California > San Diego; The city of San Diego is in the state of California. The US country code and California US area code chart below gives you the necessary information for calling American cities. 442; 661; 760; CALIFORNIA CITY, CA Covers 2 ZIP Codes. Code map and California ZIP code map and California ZIP code lookup just four years later, California experienced growth... 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