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FutureStarr858 Area code map
Area codes 619 and 858 are telephone area codes in the North American Numbering Plan (NANP) for most of San Diego County in the U.S. state of California.On March 23, 1997, most of outer northern San Diego County, desert areas and geographical areas in southeastern California split into 760. On June 12, 1999, the northern half of San Diego and the inner northern suburbs split into area code 858. In June 2000, the southern and eastern parts of the county were to split into area code 935, but that split was suspended indefinitely due to popular and political opposition.
Area codes 619 and 858 used to cover different areas of San Diego county. Back in 2017, due to telephone number exhaustion projections by the California Public Utilities Commission for NPA 619, it was decided it was time to eliminate the boundary between the two area codes, the move resulting in a new overlay complex 619/858. This decision was put into practice on June 19, 2018.
This study recounts the history of the 858 area code, from the time it was included in the 619 area code. It now covers the northern part of San Diego in Southern California. This report should be viewed in a broader context than the facts pertaining solely to the 858 area code. The report evaluates the status of number availability in the 858 area code, and discusses the various state and federal policies which govern number use in California and nationwide. In addition, the report analyzes number use by carrier category and identifies what measures the CPUC can employ in the 858 and other area codes to improve efficiency of number use in order to prematurely avoid opening new area codes. Data is self-reported by the companies; the CPUC staff has not audited any 858 utilization data submitted for this study and report.
The 858 area code is a classic example of area code proliferation in California. The 858 area code was created in 1999 when it was split from the 619 area code. The 619 area code was implemented in 1982 when it was geographically split from the 714 area code. The 714 area code was originally part of the 213 area code, one of the first three area codes in California when the North American Numbering Plan was implemented in 1947. The 213 area code originally covered all of southern California. The 213 area code was reduced in size by the creation of area code 714 in 1951, 805 in 1957, 818 in 1984, 310 in 1992, 858 in 1997, and 562 in 1998. The 858 area code includes the northern part of the San Diego area including the cities of DelMar, La Jolla, Poway, Rancho Bernardo, Rancho Santa Fe, Linda Vista, and Mira Mesa. The 858 area code is contained within the San Diego Metropolitan Statistical Area (MSA).
Although Southern California was originally Mexican Territory, it was won by the United States in the Mexican-American war in 1848. Afterward, the city of San Diego was officially incorporated in 1850. The area quickly became a base for US Military branches and because of that the population and economy grew during World War II. Now San Diego is a cultural and economic hub of California and the 8th largest city in the United States. (Source: www.nextiva.com)