California | Tele-Tech Services Blog


New NPA 279 has been assigned for relief in Northern California where the current 916 area code is reaching exhaustion. The earliest activation date for central office codes in NPA 279 is March 10, 2018. The dialing plan in this area includes 1+ 10-digits for local and toll calls to within the NPA, and to all other NPAs. Permissive 1+10-digit dialing begins August 12, 2017. Mandatory 1+10-digit dialing begins February 10, 2018.

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