Area Code Atlas

NPA 270 split from 502

Area code 270 was assigned to the western half of Kentucky in 1999, splitting from area code 502 to address number exhaustion and accommodate growing demand.

NPA 270 split from 502

Area code 270 was created in February 1999 as a split from area code 502, covering the western and south central parts of Kentucky. The split generally followed the boundary between the Eastern and Central time zones, with 270 assigned to the Central Time Zone portion.

Area code 270 split from 502 for western Kentucky

On April 19, 1999, area code 270 was created in a geographic split from area code 502. The split assigned 270 to western Kentucky, while 502 continued to serve the Louisville region. A permissive dialing period began on this date, allowing calls to the new 270 region to be completed using either the 502 or 270 code.

Permissive dialing period begins for 270 split from 502

A permissive dialing period for the new 270 area code began on April 19, 1999, allowing calls to be completed using either 502 or 270 until November 1, 1999.

Mandatory dialing of NPA 270

On November 1, 1999, the permissive dialing period for area code 270 ended. After this date, calls to numbers in the 270 region required the use of the new area code, and calls dialed with the old 502 code were routed to intercept.

Correction to PL 270, 716-585 Split (New York)

Exhaustion of area code 270 projected

The Kentucky Public Service Commission announced in September 2006 that area code 270 was projected to exhaust its available numbers by late 2007 due to rapid growth in cell phone and pager usage.

PSC orders split of area code 270 to create 364

On May 31, 2007, the Kentucky Public Service Commission ordered a geographic split of area code 270 due to rising demand for new telephone numbers. The plan called for the creation of area code 364 to serve the western portion of the current 270 region.

Split of area code 270 announced to create 364

The Kentucky Public Service Commission announced plans to split area code 270 along the Pennyrile Parkway, creating a new area code 364 for western Kentucky including Paducah, Hopkinsville, Henderson, Madisonville, Murray, and the Kentucky side of Fort Campbell. The west-central Kentucky region including Bowling Green, Owensboro, and Elizabethtown would retain 270.

Area code 364 announced as new code for western Kentucky

On June 13, 2007, the Kentucky Public Service Commission announced area code 364 as the new code for western Kentucky, designated for the western portion of the 270 region. The implementation was to be delayed in favor of number conservation measures including expanded number pooling.

Permissive dialing for area code 364 postponed

On June 15, 2007, the Kentucky Public Service Commission postponed the start of permissive dialing for area code 364, delaying the transition to the new code. The new date for permissive dialing was set for October 1, 2008.

Implementation of area code 364 delayed

The Kentucky Public Service Commission postponed the permissive dialing period for area code 364 to October 1, 2008, delaying the relief implementation originally planned for 270.

NPA 270 Split, Creating NPA 364 (Kentucky)

Further postponement of area code 364 permissive dialing

The Kentucky Public Service Commission postponed the permissive dialing period for area code 364 again, moving it to January 1, 2009.

Permissive dialing for area code 364 postponed again

On November 9, 2007, the Kentucky Public Service Commission further postponed the start of permissive dialing for area code 364, revising the date to January 1, 2009.

NPA 270 Split, Creating NPA 364 (Kentucky) - Change Start of Permissive Dialing

Permissive dialing for area code 364 postponed to April 1, 2010

On March 31, 2008, the Kentucky Public Service Commission postponed the start date for permissive dialing of area code 364 to April 1, 2010, citing the effects of number pooling and conservation measures.

Area code 364 permissive dialing postponed to April 2010

The Kentucky Public Service Commission postponed the permissive dialing period for area code 364 to April 1, 2010, with no date set for mandatory dialing.

NPA 270 Split, Creating NPA 364 (Kentucky) - Change Start of Permissive Dialing

Permissive dialing for area code 364 postponed to January 1, 2012

On June 2, 2009, the Kentucky Public Service Commission postponed the start date for permissive dialing of area code 364 to January 1, 2012, due to continued number conservation efforts.

Area code 364 permissive dialing postponed to January 2012

The Kentucky Public Service Commission postponed the permissive dialing period for area code 364 to January 1, 2012, with mandatory dialing still undetermined.

NPA 270 Split, Creating NPA 364 (Kentucky) - Change Start of Permissive Dialing

Split of area code 270 to create 364 suspended indefinitely

On August 13, 2010, the Kentucky Public Service Commission suspended indefinitely the planned split of area code 270 and the implementation of area code 364. This decision was due to the success of number conservation measures and reduced demand, with no permissive dialing date set.

NPA 270 Split, Creating NPA 364 (Kentucky) - Start of Permissive Dialing Suspended

Planned new Western Kentucky area code cancelled

The planned new area code 364 for western Kentucky was cancelled completely in December 2010, believed to be dead due to number conservation and economic factors.

NPA 270 (Kentucky) - 2-way Split, Creating 364 NPA - Relief Plan Cancelled

Overlay of area code 364 planned for 270 region

On September 27, 2012, the Kentucky Public Service Commission announced that all number conservation options had been exhausted, and area code 364 would be implemented as an overlay for the 270 region. This would require 10-digit dialing for local calls and allow existing 270 numbers to be retained.

NPA 364 overlay on 270 announced

NPA 364 to Overlay NPA 270 (Kentucky)

Permissive dialing begins for area code 364 overlay

On August 3, 2013, the permissive dialing period for the 364 overlay of area code 270 began in Western Kentucky, allowing calls to be completed using either 7- or 10-digit dialing.

Mandatory 10-digit dialing for area codes 270 and 364

On February 1, 2014, the permissive dialing period for area code 364 ended, and mandatory 10-digit dialing was implemented for all calls within the 270 and 364 area codes in western and south-central Kentucky. This change was required to accommodate the new overlay and ensure proper call routing.

Area code 364 activated as overlay for 270

On March 3, 2014, area code 364 was activated as an overlay for the existing 270 region in western and south-central Kentucky. This overlay was implemented to address number exhaustion in the 270 area, allowing new numbers to be assigned with the 364 code while existing numbers retained 270.

Area code 364 activated as overlay of 270

Area code 364 entered service on March 3, 2014, as an overlay to area code 270, covering the same geographic area in western and south central Kentucky.