Kentucky's numbering plan areas, and area codes 270/364 (light green)

Area codes 270 and 364 are telephone overlay area codes in the North American Numbering Plan (NANP) for the Commonwealth of Kentucky's western and south central counties. Area code 270 was assigned in a split of numbering plan area 502 in 1999.[1] Area code 364 was added to the same numbering plan area in 2014, after having been first considered for 270-relief planning in 2007. Major cities in the numbering plan area include Hopkinsville, Paducah, Henderson, Murray, Bowling Green, Owensboro, Elizabethtown, and Madisonville. It also includes Kentucky's share of Fort Campbell.

History

When the American Telephone and Telegraph Company (AT&T) designed the first nationwide telephone numbering plan for Operator Toll Dialing in 1947, the entire state of Kentucky was designated as a single numbering plan area, and was assigned area code 502 as one of the 86 original North American area codes.[2]

The eastern half of the state was assigned area code 606 in 1954,[3] while the western half received area code 270 in 1999.[4]

The split generally followed the boundary between the Eastern and Central time zones; generally, Kentucky's share of the Central Time Zone became 270.

The creation of 270 was intended as a long-term solution. However, within only six years, 270 was already close to exhaustion due to the proliferation of cell phones and pagers. In 2006, Kentucky officials announced that 270 would run out of numbers in late 2007.[5][6] On May 31, 2007, the Kentucky Public Service Commission (PSC) announced that 270 would be split along the Pennyrile Parkway, with a newly created area code serving western Kentucky (Paducah, Hopkinsville, Henderson, Madisonville, Murray, and the Kentucky side of Fort Campbell), with west-central Kentucky (Bowling Green, Owensboro and Elizabethtown) retaining 270.[7]

The PSC noted that mandatory number pooling, recently imposed on the region, may delay the implementation of the new code—and thus spare customers in the territory slated to move to 364 the expense and burden of having to change their numbers for the second time in a decade. Surprisingly, Kentucky's two most urbanized numbering plan areas, 502 (Louisville) and 859 (serving Lexington and Northern Kentucky), were not expected to exhaust until 2017 at the earliest, even though they have fewer numbers than 270.

On June 13, 2007, the PSC announced that the new area code will be 364, but also announced that the previously announced implementation would be delayed in favor of number conservation measures including expanded number pooling.[8] On June 15, 2007, the PSC postponed the permissive dialing of the new 364 area code to October 1, 2008. Mandatory dialing to the new area code was changed as well, but the actual date was to be determined later by the PSC.[9] On November 1, 2007, the PSC again postponed permissive dialing of the new 364 area code, this time to January 1, 2009.[10] On March 31, 2008, the PSC again postponed permissive dialing of the new 364 area code, to April 1, 2010. A date for mandatory dialing to 364 was left undetermined.[11]

On June 2, 2009, the PSC again postponed permissive dialing of the new 364 area code, to January 1, 2012. Mandatory dialing to 364 was still left undetermined.[12] The split was suspended indefinitely on August 13, 2010, with no permissive dialing date.[13] In December 2010, relief was suspended completely and was believed to be dead.[14] These subsequent delays of the implementation of the 270 / 364 area code split were due to further use of number conservation measures, including mandatory and expanded number pooling, as well as a weakened economy and a reduced usage of telephone numbers dedicated for use by computer and fax modems.

On September 27, 2012, the PSC announced that all number conservation options had been exhausted, and the implementation of 364 could no longer be delayed. According to the PSC, NANPA projected the 270 region would exhaust by the first quarter of 2014. NANPA recommended that instead of the original proposal for a split, 364 should be implemented as an overlay for the 270 region. Under the NANPA proposal, existing 270 numbers would be retained by customers, but 10-digit dialing for local calls would be required across western Kentucky.[15]

The PSC also considered an alternate proposal to split the 270 area code region. "Splitting the area code in two avoids ten digit dialing but requires changing all current area code 270 numbers within the new area code to 364. That includes numbers assigned to wireless devices," said Andrew Melnykovych, Director of Communications for the PSC. The commission announced plans to hold public meetings throughout the 270 region the next month to explain the options and receive public comment. The commission also said that it will accept comments on the industry's overlay proposal for the 270 region up through November 16, 2012.[16]

See also

References

  1. ↑ "Planning Letter 155: Split of 502 Numbering Plan Area (NPA) in Kentucky" (PDF). Lockheed Martin (North American Numbering Plan Administration). February 1, 1999. Archived (PDF) from the original on May 10, 2013. Retrieved January 11, 2013.
  2. ↑ "NANP Area Code History: 1947". Archived from the original on 2006-10-16. Retrieved 2006-10-03.
  3. ↑ "NANP Area Code History: 1948 - 1959". Archived from the original on 2002-09-11. Retrieved 2006-10-03.
  4. ↑ "Planning Letter 155: Split of 501 Numbering Plan Area (NPA) in Kentucky" (PDF). Lockheed Martin (North American Numbering Plan Administration). February 1, 1999. Retrieved January 11, 2013.
  5. ↑ "PSC EXAMINING OPTIONS FOR AREA CODE 270" (PDF). Archived (PDF) from the original on 2009-04-08. Retrieved 2008-04-02.
  6. ↑ "PSC ANNOUNCES PUBLIC MEETINGS ON AREA CODE 270" (PDF). Archived (PDF) from the original on 2009-04-09. Retrieved 2008-04-02.
  7. ↑ "PSC DECIDES TO SPLIT AREA CODE 270" (PDF). Archived (PDF) from the original on 2009-04-08. Retrieved 2008-04-02.
  8. ↑ "364 WILL BE KENTUCKY'S NEWEST AREA CODE" (PDF). Archived (PDF) from the original on 2009-04-08. Retrieved 2008-04-02.
  9. ↑ "PSC DELAYS IMPLEMENTATION OF AREA CODE 364" (PDF). Archived (PDF) from the original on 2009-04-08. Retrieved 2008-04-02.
  10. ↑ "PSC POSTPONES IMPLEMENTATION OF AREA CODE 364" (PDF). Archived (PDF) from the original on 2009-04-08. Retrieved 2008-04-02.
  11. ↑ "PSC POSTPONES START DATE FOR AREA CODE 364 TO APRIL 2010" (PDF). Archived (PDF) from the original on 2009-04-08. Retrieved 2008-04-02.
  12. ↑ "Start Date for Area Code 364 Postponed Until January 2012" (PDF). Archived (PDF) from the original on 2009-07-02. Retrieved 2009-07-20.
  13. ↑ "KY 270 NPA; 2-way Split, Creating 364 NPA - Start of Permissive Suspended" (PDF). 2010-08-19. Archived (PDF) from the original on 2010-11-26. Retrieved 2010-08-20.
  14. ↑ Howington, Patrick (13 December 2010). "Planned new Western Kentucky area code cancelled". Courier-Journal. Retrieved 4 January 2014.(subscription required)
  15. ↑ "New Area Code Needed in Western Kentucky" (PDF). Archived (PDF) from the original on 2014-01-04. Retrieved 2012-09-28.
  16. ↑ "New Area Code Needed in Western Kentucky" (PDF). Archived (PDF) from the original on 2014-01-04. Retrieved 2012-09-28.
Kentucky area codes: 270/364, 502, 606, 859
North: 618, 812/930, 502, 859
West: 618, 573 270/364 East: 502, 606
South: 731, 931, 615/629
Missouri area codes: 314/557, 417, 573, 636, 660, 816
Illinois area codes: 217, 224/847, 309, 312, 331/630, 618, 708, 773, 779/815, 872
Indiana area codes: 219, 260, 317/463, 574, 765, 812/930
Tennessee area codes: 423, 615/629, 731, 865, 901, 931
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