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An area code overlay is a numbering plan area (NPA) in the
North American Numbering Plan
The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the international calling ...
(NANP) that has multiple
area code
A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, re ...
s assigned.
Overlay plan
Overlay may refer to:
Computers
* Overlay network, a computer network which is built on top of another network
* Hardware overlay, one type of video overlay that uses memory dedicated to the application
*Another term for exec, replacing one proce ...
s are used to increase the number of available
telephone number
A telephone number is a sequence of digits assigned to a landline telephone subscriber station connected to a telephone line or to a wireless electronic telephony device, such as a radio telephone or a mobile telephone, or to other devices f ...
s in a
province
A province is almost always an administrative division within a country or state. The term derives from the ancient Roman ''provincia'', which was the major territorial and administrative unit of the Roman Empire's territorial possessions outsi ...
,
state
State may refer to:
Arts, entertainment, and media Literature
* ''State Magazine'', a monthly magazine published by the U.S. Department of State
* ''The State'' (newspaper), a daily newspaper in Columbia, South Carolina, United States
* '' Our ...
, or region.
[Haar, Dan and Vanessa Hua]
"Regulators Have Area Code Plan"
''The Courant''. August 18, 1999. Accessed October 28, 2005.
The North American Numbering Plan Administrator (NANPA) maintains the definitive list of overlays in the United States.
The majority of overlays have occurred since 1995. The process has been driven by fragmentation of numbering resources by a growing number of
competitive local exchange carrier A competitive local exchange carrier (CLEC), in the United States and Canada, is a telecommunications provider company (sometimes called a " carrier") competing with other, already established carriers, generally the incumbent local exchange carrie ...
s.
Active area code overlays
Pending and planned overlays
Various new area codes are planned or proposed. A few overlay implementations (247 WI, 354 QC, 679 MI, 870 AR, 975 MO, et al.) have been suspended, often because wasteful allocation of telephone numbers has been mitigated by
number pooling
Number pooling is a method of reallocating telephony numbering space in the North American Numbering Plan, primarily in growth areas in the United States.
Instead of allocating blocks of ten thousand numbers to each carrier in each community, a bl ...
or other conservation efforts.
*
274
Year 274 ( CCLXXIV) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Aurelianus and Capitolinus (or, less frequently, year 1027 ''A ...
was assigned for an overlay of
920
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Year 920 ( CMXX) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar.
Events
By place
Byzantine Empire
* December 17 – Romanos I has himself crowned co-emperor of the Byzan ...
, originally scheduled for 2012, then postponed to 2014, and finally indefinitely postponed.
*
354
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Year 354 ( CCCLIV) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantius and Constantius (or, less frequently, yea ...
was assigned for an overlay of
450 and 579, originally scheduled for October 24, 2020, but the additional overlay has been postponed indefinitely.
*
387
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Year 387 (Roman numerals, CCCLXXXVII) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Eutropius (or, less freq ...
is reserved as a future overlay for
416
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Year 416 ( CDXVI) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Theodosius and Palladius (or, less frequently, year 1169 ...
.
*
428
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Year 428 ( CDXXVIII) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Felix and Taurus (or, less frequently, year 1181 ''Ab u ...
is planned for overlay of
506
Year 506 (DVI) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Messala and Dagalaiphus (or, less frequently, year 1259 ''Ab urbe cond ...
starting on April 29, 2023.
*
557
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Year 557 ( DLVII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 557 for this year has been used since the early medieval period, when the Anno Domini calendar era ...
is planned for overlay of
314
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Year 314 ( CCCXIV) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Rufius and Annianus (or, less frequently, year 1067 ''A ...
starting in August 2022.
*
564
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Year 564 ( DLXIV) was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar. The denomination 564 for this year has been used since the early medieval period, when the Anno Domini calendar era be ...
currently overlays
360 360 may refer to:
* 360 (number)
* 360 AD, a year
* 360 BC, a year
* 360 degrees, a circle
Businesses and organizations
* 360 Architecture, an American architectural design firm
* Ngong Ping 360, a tourism project in Lantau Island, Hong Kong
* ...
, but will expand to overlay area codes
206
Year 206 ( CCVI) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Umbrius and Gavius (or, less frequently, year 959 ''Ab urbe condit ...
,
253
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Year 253 ( CCLIII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Volusianus and Claudius (or, less frequently, year 1 ...
, and
425
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Year 425 ( CDXXV) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Theodosius and Valentinianus (or, less frequently, yea ...
as those
Seattle
Seattle ( ) is a port, seaport city on the West Coast of the United States. It is the county seat, seat of King County, Washington, King County, Washington (state), Washington. With a 2020 population of 737,015, it is the largest city in bo ...
-area codes run out of numbers.
*
656
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Year 656 ( DCLVI) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar. The denomination 656 for this year has been used since the early medieval period, when the Anno Domini calendar era be ...
is planned for an overlay of
813
Events
By place
Byzantine Empire
* June 22 – Battle of Versinikia: The Bulgars, led by Krum, ruler (''khan'') of the Bulgarian Empire, defeat Emperor Michael I near Edirne (modern Turkey). The Byzantine army (26,000 men) is d ...
in mid-to-late February 2022.
*
679
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Year 679 ( DCLXXIX) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. The denomination 679 for this year has been used since the early medieval period, when the Anno Domini calenda ...
, planned to overlay
313
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Year 313 ( CCCXIII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantinus and Licinianus (or, less frequently, ye ...
in Michigan., indefinitely postponed.
*
728, planned to overlay 561 in Florida, to go into effect March 2023
*
730
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Year 730 (Roman numerals, DCCXXX) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. The denomination 730 for this year has been used since the early medieval period, when the Anno Domin ...
is reserved as a future overlay for
618 in southern Illinois, expected to go into effect on July 7, 2023.
*
742
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Year 742 ( DCCXLII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 742 for this year has been used since the early medieval period, when the Anno Domini calendar era ...
is reserved as a future overlay for
905
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Year 905 ( CMV) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar.
Events
By place
Europe
* Spring – King Berengar I of Italy arranges a truce with the Hungarians, on ...
.
*
826
Year 826 ( DCCCXXVI) was a common year starting on Monday (link will display the full calendar) of the Julian calendar, the 826th year of the Common Era (CE) and ''Anno Domini'' (AD) designations, the 826th year of the 1st millennium, the 26th ...
will overlay
540
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Year 540 ( DXL) was a leap year starting on Sunday of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Iustinus without colleague (or, less frequently, year 1293 ''Ab urbe condita''). The deno ...
in
Virginia
Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the East Coast of the United States, Atlantic Coast and the Appalachian Mountains. The geography an ...
on June 14, 2022.
*
Area code list">
835 is proposed to overlay
610 and
484. This plan has been suspended by the Pennsylvania Public Utilities Commission.
*
861 is reserved as a future overlay for
309 in western Illinois, expected to go into effect on February 24, 2023.
*
879 is planned to overlay
709 in
948 is planned for an overlay of Area codes 757 and 948">757
757 may refer to:
* Boeing 757: a narrow-body airliner
* AD 757
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Year 757 ( DCCLVII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. The denomination 757 for this year has been us ...