Area Code 213: Los Angeles and the Birth of California's Phone System
Area code 213 once covered all of California. Today it covers a small slice of downtown Los Angeles. The story of 213's dramatic shrinkage mirrors California's explosive growth.
213: California's First Area Code
When the North American Numbering Plan launched in 1947, the entire state of California was assigned a single area code: 213. This made sense at the time — California had about 9 million residents, concentrated mainly in Los Angeles and the Bay Area, with vast stretches of unpopulated desert and mountain terrain in between.
The middle digit "1" reflected California's high population status, following the Bell System's convention of assigning low-dial-time codes to populous regions.
The Great California Split
California's population growth has been the most dramatic of any US state. From the 1950s onward, 213 was split repeatedly:
- 1951: 916 split off for Northern California (Sacramento region)
- 1984: 619 split off for San Diego
- 1984: 818 split off for the San Fernando Valley
- 1991: 310 split off for the Westside and South Bay of LA
- 1998: 323 split off for East LA and surrounding communities
213 Today: Downtown Los Angeles
After decades of splits, 213 now covers only the core of downtown Los Angeles — a tiny fraction of its original territory. The code that once served all of California's 163,000 square miles now covers a few dozen. It's one of the most dramatic geographic contractions of any area code in history.
California's Area Code Explosion
Today, California has more area codes than any other state — over 35 active codes serving its population of nearly 40 million people. The California area code page lists them all. The state's ongoing population growth and high density of tech companies, which consume large numbers of phone numbers for business lines and services, ensures that California will likely need additional codes in the coming decades.
More Area Code Guides
Area Code 617: Boston, New England, and the Story of the Hub's Number
Area code 617 has served Boston since 1947, but it once covered all of New England. Here's how Massachusetts got its current area code geography.
Mountain Time Zone Area Codes: The Interior West
The Mountain Time Zone covers the Rocky Mountain states, the high desert, and the Canadian prairies. Here's a guide to the area codes of this vast interior region.
Pacific Time Zone Area Codes: From Seattle to San Diego
The Pacific Time Zone runs down the entire West Coast of the US and Canada. Here's a complete overview of the area codes in California, Oregon, Washington, and British Columbia.