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Over the next fifty years, various technologies of microwave radio were
#310 area code manual
At theĬentral office, a manual switchboard was installed to serve the island To be built in the United States and first to be voice-only.
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A new central office was built in Avalon and the cables were terminated at Within a few years it was realized the radio didn't offer much privacy so PT&T installed two 23-mile long submarine cables to the island in 1923. In 1920, Pacific Telephone and Telegraph (PT&T) installedĪ local radio-telephone system to connect the island with the mainland.įifty-two persons were part of the initial subscribers to this service. Very unique office that serves the island community of Avalon on TheĤ24 would be the first overlay area code to be effective in California. With the cellular phone growth existing numbers would be impacted and by JulyĢ006, the 424 overlay was required and implemented for the 310 area code. Reflect the new code and influential persons of the Los Angeles "Westside" andĪfter much discussion the California Assembly passed an act to use those un-usedīlocks of numbers assigned to the telephone compnaies. Many South Bay businessesĬomplained that they would have to change ads, signage and other materials to Numbers would now require ten-digit dialing. In 1999, however much controversy was generated because even calling local Southern portion of Los Angeles County and parts of northern Orange County toĪn overlay of the 310 area code using 424 was proposed Eventually aera code 310 was further split into 562 moving the far To split the areas of west Los Angeles, and South Bay region into its own areaĬode. Growth of pagers, fax machines and cell phones during the 1980s, it was decided The original 213 area code serving the Los Angeles region. CALIFORNIA STATE TELEPHONE CENTRAL OFFICE'SĪrea code 310 was created in October 1991 as a split of