Area Code Atlas

914 NPA Split, Creating 845 NPA (New York)

NPA 845 split from 914 for the Hudson Valley

On June 5, 2000, area code 845 was created by splitting from most of the territory of area code 914. The split assigned 845 to the Hudson Valley, while 914 was reduced to cover only Westchester County.

Revised Mandatory Dialing Date for the 914/845 Split (New York)

Transition to 10-digit dialing for 988 in area code 845

Area code 845 had telephone numbers assigned for the central office code 988. Since 988 was designated nationwide as a dialing code for the National Suicide Prevention Lifeline in 2020, this created a conflict for exchanges permitting seven-digit dialing. The area code was scheduled to transition to ten-digit dialing by October 24, 2021.

Permissive 10-digit dialing begins for 845

Permissive 10-digit dialing began on April 24, 2021, for area code 845 in preparation for the transition to mandatory 10-digit dialing due to the designation of 988 as the National Suicide Prevention Lifeline code.

Mandatory ten-digit dialing for 845

Area code 845 transitioned to mandatory ten-digit dialing on October 24, 2021, due to the nationwide designation of 988 as a three-digit code for the National Suicide Prevention Lifeline. This change was required to resolve conflicts with existing 988 central office assignments.

NPA 329 overlay on 845 announced

NPA 329 to Overlay NPA 845 (New York)

NPA 329 authorized as overlay for 845

On May 11, 2022, the North American Numbering Plan Administrator authorized area code 329 as an all-services overlay for area code 845 to provide additional numbering resources for the region.

NPA 329 overlay activated for 845

Area code 329 was activated as an overlay for area code 845 on March 24, 2023, allowing new telephone numbers in the region to be assigned either code. Both codes now serve the same geographic area in the mid- and lower Hudson Valley.