LincMad’s New Area Code Dates

Last updated

Older splits and overlays (effective before ) — see oldnews.html;
Note: all dates are in year-month-day format, so = May 24, 2025.
Dates given in the form are 3rd Quarter of 2029, for example.
For overlays, the first date listed is for mandatory 10-digit (or in some cases, 1+10-digit) local calls; if no date is given, the area already has mandatory 10D/1+10D local calls. The second date is when numbers in the new overlay code can be assigned.

Old New Area Affected 10D/1+10D Dialing Overlay Test Number
945 TX: Dallas and suburbs; area code 945 was added to 214 & 972 & 469 overlay 945-945-1945
526 non-geographic: more numbers for iPads, tablets, etc. — mostly non-dialable from ordinary phones (none)
909 840 CA: San Bernardino, Ontario 840-840-1840
217 447 IL: Champaign, Springfield 447-447-1447
814 582 PA: Altoona, Erie: originally scheduled as an overlay in 2002, then shelved, then scheduled as a split for , with Erie changing to 582 and Altoona keeping 814, then shelved again. However, the overlay finally happened on . 582-990-TEST
405 572 OK: Oklahoma City 572-572-1572
850 448 FL: Tallahassee, Pensacola, panhandle 448-448-1448
527 non-geographic: more numbers for iPads, tablets, etc. — mostly non-dialable from ordinary phones (none)
474 🇨🇦 SK: entire province of Saskatchewan, Canada 1–474 +
(210, 410, 610, or 810)
+ (–TEST/–8378 or/ou
742 🇨🇦 ON: Toronto suburbs (not including the city of Toronto); the 905 & 289 & 365 overlay added 742 on 1–742 +
(222, 610, or/ou 999)
+ –TEST/–8378 or/ou
202 771 DC: the city of Washington, D.C. 771-990-TEST
(multi) Major change throughout the United States: A total of 82 U.S. area codes in 35 states (plus Guam) changed to mandatory 10-digit or 1+10D dialing for local calls, phased in from through in preparation for the introduction of the national 988 suicide prevention lifeline. (More information on “The Big 10D”)
708 464 IL: La Grange, certain suburbs south or west of Chicago; (Originally approved in 1999, but not formally scheduled until July 2021, effective .) 464-464-1464
813 656 FL: Tampa; (postponed due to Covid-19)

528 non-geographic: more numbers for iPads, tablets, etc. — mostly non-dialable from ordinary phones (none)
943 GA: Atlanta metro area; 404 & 770 & 678 & 470 & 943) 943-943-1943
753 🇨🇦 ON: Ottawa; (originally planned for , the date was advanced by more than a year, to ) (initialement prévu pour le , le recouvrement fut avancé de plus d’un an jusqu’au ) 1-753-610 + (–TEST/–8378 or/ou –BILL$/–2455$)
368 🇨🇦 AB: entire province of Alberta, Canada, area codes 403, 780, 587, and 825 1–368 + (410, 610, 645, 710, 810, 888, or 999) + (–TEST/–8378 or/ou –BILL$/–2455$)
757 948 VA: Norfolk, Virginia Beach (revised official dates) 948-990-TEST
540 826 VA: Roanoke, Harrisonburg, outer suburbs of Washington, D.C. 826-990-TEST
983 CO: Denver metro area 983-983-1983
683 🇨🇦 ON: Sudbury, Peterborough 1–683–610 + –TEST/–8378) or/ou –BILL$/–2455$)
314 557 MO: St. Louis; (planned for 2001, suspended in 2002, finally happened in 2022) 557-557-1557
835 PA: Philadelphia suburbs 835-990-TEST
529 non-geographic: more numbers for iPads, tablets, etc. — mostly non-dialable from ordinary phones (none)
910 472 NC: Fayetteville, Wilmington; (Area code 472 overlays 910; date advanced by nearly 5 months) 472-472-1472
263 🇨🇦 QC: Montréal (city only, not including suburbs) • (la ville seulement, banlieue non incluse) 1-263 + (210 ou/or 610) + (–TEST/–8378 ou/or –BILL$/–2455$)
354 🇨🇦 QC: Laval, suburbs/banlieue of Montréal; officially confirmed • officiellement confirmé 1–354 +
(210, 580, 610, 710, 999)
+ (–TEST/–8378
ou/or –BILL$/–2455$)
468 🇨🇦 QC: Gatineau/Hull, central, western, and northern Québec • Gatineau/Hull, le centre, l’ouest, et le nord du Québec 1–468 + (210 or/ou 610) + –TEST(–8378) or/ou –BILL$(–2455)$
584 🇨🇦 MB: entire/l’ensemble de la province 584-610-TEST
209 350 CA: Stockton, Modesto; (The 209 area code was expected to run out of numbers around 2026 or 2027, but updated projections advanced that date to late 2022. Despite having more than a year to prepare, the California Public Utilities Commission dithered and delayed for no apparent reason, waiting until well after the last possible moment to rubber-stamp the obviously inevitable conclusion. On the CPUC announced that area code 350 will be added as an overlay on 209 in late 2022, but they still left open the effective date for the overlay. Finally, on , the effective date of was announced.) 350-350-1350
516 363 NY: Nassau County (western Long Island); (516 & 363 overlay) 363-990-TEST
707 369 CA: north coast of California, Santa Rosa, Napa, Eureka 369-369-1369
309 861 IL: Bloomington, Peoria, Quad Cities 861-861-0861
561 728 FL: Palm Beach County 728-728-1728
845 329 NY: Poughkeepsie, north suburbs of NYC (except Westchester County) 329-990-TEST
513 283 OH: Cincinnati; (Reinstated; back in 2001, 283 was announced as the new overlay code, but then, in 2002, 283 was assigned as a prefix in 513 (i.e., numbers of the form 513-283-xxxx), which usually would mean that 283 would not be used as an overlay, due to the obvious potential for confusion. However, the PUCO announced that 283 will be the overlay, effective ) 283-283-0283
506 428 🇨🇦 NB: entire province of New Brunswick, Canada •
l’ensemble de la province du Nouveau-Brunswick

1–428 + (580, 610, or/ou 999) + –TEST(–8378) or/ou –BILL$(–2455)$
920 274 WI: Green Bay, northeastern; (originally scheduled for 2012, finally scheduled for , but now advanced by 9½ months)

633 🇨🇦 Canada: non-geographic numbering (includes caller-pays cellular and machine-to-machine) (none)
867 🇨🇦 Northwest Territories: Yellowknife local calling area only changed to mandatory 10-digit local calls; (note: Yukon, Nunavut, and the rest of NWT get to keep 7-digit local calls) (n/a) (not applicable)
807 🇨🇦 ON: westernmost part, from Lake Superior (Thunder Bay) to Hudson Bay (Fort Severn/‌ᐗᔕᐦᐅ ᐃᓂᓂᐗᐠ); 807 changed to mandatory 10-digit local calling for absolutely no valid reason; see Why is Thunder Bay losing 7-digit local calling?
(Note: Thunder Bay itself got a reprieve until .)

(Thunder Bay only)
(n/a) (not applicable)
227 MD: Silver Spring, suburbs of Washington, D.C. 227-990-TEST
382 🇨🇦 ON: London, Windsor 382-610-TEST
618 730 IL: East St. Louis, southern 730-730-1730
645 FL: Miami/Dade, Florida Keys 645-645-1645
AZ: Phoenix metro area; the boundaries from the 602/480/623 split were erased, creating the 602 & 480 & 623 overlay; in practice, mostly new 623 numbers will be assigned into the current 480 and 602 areas; the 480‡ area already had mandatory 10D local calls due to The Big 10D (none)
608 353 WI: Madison, southwestern 353-353-1353
816 (975) MO: Kansas City; (suspended in 2002, finally resurrected in 2021) 975-975-1975
716 (624) NY: Buffalo, western tip 624-624-1624
(532) non-geographic: more numbers for iPads, tablets, etc. — mostly non-dialable from ordinary phones (none)
804 (686) VA: Richmond, Petersburg; 804 & 686 overlay 686-990-TEST
709 (879) 🇨🇦 NL: entire province of Newfoundland & Labrador, Canada (was postponed indefinitely, but now scheduled for early 2024)l’ensemble de la province de Terre-Neuve-et-Labrador, Canada (était remis indéfiniment, mais désormais prévu début 2024); (mandatory 10-digit local dialing began • la composition obligatoire de 10 chiffres pour les appels locaux commença le )

1–879 + (610, 630, or/ou 640) + (–TEST/–8378 or/ou –BILL$/–2455$)
870 (327) AR: Jonesboro, Pine Bluff, southern, eastern, north central (surrounds Little Rock on 3 sides) originally announced for but postponed indefinitely, finally scheduled for , but then advanced by 3½ months to ; note: area code 870 is not affected by “The Big 10D” and will thus retain 7-digit local calls until the overlay.
Arkansas is also planning to implement a “boundary elimination” overlay on the entire state in early 2025; see the note below for more information.

904 (324) FL: Jacksonville 324-324-0324
440 (436) OH: Lorain, Ashtabula 436-436-1436
573 (235) MO: Columbia, Jefferson City, Cape Girardeau, eastern Missouri outside the St. Louis metro area 235-235-1235
864 (821) SC: Greenville, Spartanburg, northwestern; note: area code 864 is not affected by “The Big 10D” and will keep 7-digit local calls until a month before the overlay 821-821-0821
507 (924) MN: Rochester, Mankato, southern 924-924-1924
(738) CA: Downtown Los Angeles (will overlay 213 & 323, date t.b.d.) 738-738-1738
530 (837) CA: Redding, Chico, Davis, Lassen, northeastern 837-837-1837
AR: entire state; the 870 & 327 overlay will expand to cover the entire state in a “boundary elimination” overlay, currently planned for

Area code 501 (Little Rock) already has 10D local calls as a result of “The Big 10D” and area codes 870 & 327 will have 10D as a result of the initial overlay, so only 479 (northwest Arkansas) will have to change to 10D in 2025.
423 (729) TN: Chattanooga, Johnson City, not Knoxville; 729 overlay expected in early 2025. Area code 423 will retain 7-digit local calls until shortly before the overlay takes effect 729-729-0729
(942) 🇨🇦 ON: Toronto (only • seulement) 1–942–610 + (–TEST/–8378 or/ou –BILL$/–2455$)
(257) 🇨🇦 BC: British Columbia, entire province • l’ensemble de la province de la Colombie-Britannique 1–257 + (580, 610, 710, 810, or/ou 999) + (–TEST/–8378 or/ou –BILL$/–2455$)
206 (564) WA: Seattle; 360 & 564 overlay will expand to include 206, and will later expand to include 425 and 253 (none)
318 (457) LA: Shreveport, Alexandria, Monroe, northern 457-457-1457
(679) MI: Detroit, Ann Arbor; (officially scheduled); 679 will overlay 313 on , and expand to also overlay 734, circa 2026. Neither 313 nor 734 is affected by “The Big 10D.” 679-679-0679
207 (tba) ME: entire state of Maine; overlay was projected for 2023 or 2024, but has been pushed back to about . My best guess for the new area code is 258. t.b.a.
How to read the chart

black - new area code is already in use
blue - mandatory 10D (or 1+10D) dialing is in effect in preparation for an overlay
green - new area code not yet in use
red - special notations
t.b.a. - to be announced à communiquerse anunciará
t.b.d. - to be determined à déterminerse determinará
- area affected by “The Big 10D”; mandatory 10D began no earlier than , no later than , generally at each carrier’s discretion except where a different date is listed here
$ - test number known to bill

10D/1+10D” refers to the date on which it becomes mandatory to dial all local calls with the area code. In some areas, you must dial only the area code and number, for a total of 10 digits. In other areas, you must dial 1 plus the area code and number on all calls. In yet other areas, you may optionally dial 10D or 1+10D on some or all local calls, or for calls within your own area code overlay whether the call is local or toll. If no date is listed in this column, the area already has mandatory 10D/1+10D local calls, or the listing is for a non-geographic code (such as toll-free numbers) in which there are no local calls, as such.

Overlay” refers to the date on which the new code goes into effect; that is, the first date on which numbers in the new code may be assigned and used.

New area codes indicated with a question mark are speculation, based on available industry data. However, the information should not be considered reliable until it is officially confirmed by NANPA.

The Test Number is a special number (usually, though not always, not charged) that allows you to test whether all the links in the chain from you to a new area code are operating correctly. In order for you to reach a new area code, your premises equipment (office PBX, for example) must allow you to dial it. Then the telco central office must accept the new area code as valid and route it correctly. If the new area code is outside your LATA, your chosen long-distance carrier must also route the call correctly. Calling one of these numbers will usually reach a simple recording saying something like, “You have successfully completed a call to area code XXX.” Note that some test numbers are billable numbers, possibly at international rates. However, most test numbers in the U.S. will not bill. In cases where a test number is shown ending with –TEST, dial –8378 (no charge); for –BILL, dial –2455 (billed).

Note that the test number for a new area code is usually disconnected within a few months after the mandatory date. If you dial one of the older test numbers shown here, you may reach an ordinary subscriber.

Don’t see a split listed here that used to be? Splits and overlays that have been cancelled or indefinitely postponed may no longer be shown.

Notes about specific areas

In early 2021, several area codes that were not expected to run out of numbers until 2024 or later, found themselves with revised projections indicating they need overlays Real Soon Now. The most stark of these is Illinois’ area code 708 (see below).


In Arizona, the 602 area code for Phoenix underwent a 3-way split in 1999, creating the 480 and 623 area codes for the east and west sides, respectively. However, the 480 area code was running out of numbers, with 602 not far behind, while 623 had enough numbers to last for several decades. Thus, the Arizona PUC decided to do a first-of-its-kind double boundary elimination overlay. Because 623 has by far the most unused numbers, there will be many 623 numbers assigned to areas now in 480 and 602, but few if any 480 or 602 numbers will be assigned outside their current boundaries.

Arkansas (new info for 2025)

Area code 870, which covers most of the land area of the state of Arkansas, was scheduled to have an overlay on , but number conservation measures extended its life by several years, so the overlay was postponed indefinitely. The effective date has finally been announced: . Of course, 7 months later, the date was advanced by 3½ months; the new effective date is . In the mean time, though, area code 870 will retain 7-digit local calling, because there is no 870-988-xxxx prefix.

Arkansas is already planning the next area code change: a “boundary elimination” overlay, erasing the boundaries between area codes 501, 479, and 870 & 327, creating one big statewide overlay with (initially) four area codes, in early 2025. Implementation details have not yet been determined. Area code 501 already has 10-digit local calls because of the 988 mandate, and 870 will switch to 10D in preparation for the first overlay, but 479 will have to introduce 10D for the big overlay.


California’s area code 209 was expected to run out of numbers by the end of 2022. The telecom industry asked regulators to finalize plans for an overlay no later than , but the CPUC dithered and delayed, finally announcing on that area code 350 will be added as an overlay, on a date still to be determined. The industry said it was critical that the CPUC issue a final decision no later than but the CPUC blithely blew right through that deadline, leaving a real threat of some customers in 209 being unable to get telephone numbers until the overlay actually happened. If you read through the May 19th decision — still marked as “proposed” — it contains several contradictory statements regarding the timing. Finally, on , they announced the effective date of — the Monday after the Thanksgiving holiday weekend, right smack in the middle of the “winter network freeze” that telcos traditionally observe in order to avoid making major changes during a period when many employees are busy with other things.

That sets us up for the next urgent area code relief in California. Area code 707 (the coast north of San Francisco) is projected to run out of numbers in early 2023. On , NANPA asked the CPUC to approve, no later than , the plan for an overlay with area code 369. Just days before that deadline, the CPUC website showed no public docket for the matter, much less any progress towards a final decision. However, the docket did exist, just not linked from the landing page for area code 707, and on , the CPUC approved the overlay, although without specifying the exact implementation dates. The effective date, , was announced with exactly six months to go. Disaster averted, but still a bewildering display of bureaucratic ineptness. Fortunately, the CPUC is doing much better with the overlay of area code 530, now scheduled for early 2025, more than 17 months in advance!

In southern California, two old area code splits have been erased in a maneuver known as a “boundary elimination overlay”. In downtown Los Angeles, the boundary between 213 and 323 has been eliminated; in San Diego, the boundary between 619 and 858 was eliminated. In each case, the two existing area codes became an overlay, with numbers from either code assignable anywhere in the combined geographic territory. In late 2024, area code 738 will be added as an overlay on 213 & 323.


The state of Illinois approved overlays for area codes 217, 708, and 618, but left the implementation dates open, to be triggered when each area code runs low enough on available numbers. The 217/447 overlay happened in , 708/464 finally went into effect in , and 618/730 went into effect in . The plan indicated that there would be a 13-month transition period in each area for permissive and then mandatory 10-digit dialing, test numbers, and finally assignment and activation of numbers in the new area code. However, the official announcement of dates for 708/464 came with barely 6 months to the activation date. The saving grace is that 708 and 618 (and all the area codes in Illinois) started mandatory 10D local calls as of , so a major hurdle for both telcos and customers had already been cleared before the overlays were ready to be activated. (In fact, nationally, of the area codes that kept 7D local calls, the first to see an overlay was Phoenix, Arizona. Area code 480 switched to 10D, but 602 and 623 kept 7D until the 602/‌480/‌623 boundary elimination overlay in 2023.)


The state of Missouri approved overlays for area codes 314 and 816, originally scheduled for 2001, then postponed until 2002, then suspended indefinitely. On , the effective dates were finally announced for 2022 and 2023, although the date for 816 was then pushed back by 8 months. The overlay for area code 573 has also been officially announced: area code 235 will be added on .

🇨🇦 Canada (English)

The Canadian province of Newfoundland and Labrador was scheduled to have an overlay of new area code 879 on existing area code 709, effective , but evolving conditions led the CRTC to postpone the overlay repeatedly, and finally postpone it indefinitely. However, the zombie overlay has been revived, now officially scheduled for

The Canadian province of New Brunswick was scheduled to have an overlay of new area code 428 on existing area code 506, effective , but evolving conditions led the CRTC to postpone the overlay, first to , and again to . The overlay has now gone into effect.

In fact, Canada is already planning overlays in every province, not including the territories of northern Canada, between now and 2024. The overlay for Newfoundland and Labrador was postponed indefinitely, but is now expected in early 2024. When that overlay finally happens, the only parts of Canada Without overlays will be area code 867 (Yukon, Northwest Territories, and Nunavut) and area code 807 (northwestern Ontario, including Thunder Bay). On the chopping block also are local interprovincial 7-digit dialing arrangements for Labrador City and Wabush, NL, and for Campbellton, NB, into the 418 & 581 & 367 area of eastern Québec. Those 7-digit dialing arrangements were terminated when Newfoundland & Labrador and New Brunswick implemented mandatory 10-digit local calls in preparation for their own overlays.

Canada has also decided to implement the 988 emergency number for suicide prevention and mental health resources, effective . As of 2022, only four Canadian area codes still permitted 7-digit local calling. New Brunswick, area code 506, was already scheduled for an overlay in early 2023. Newfoundland and Labrador, area code 709, has local numbers of the form 988-xxxx, so they introduced 10-digit dialing there, effective , even though the town where the 988 prefix is located, has a total population of 15 people. (However, since the overlay of 709 & 879, previously expected for 2028, has been advanced to early 2024, it’s a bit of a moot point.)

The territories of northern Canada, Yukon, Nunavut, and Northwest Territories, area code 867, also have 988-xxxx local numbers, specifically in Yellowknife, NWT. However, because the North is so sparsely populated, with most local calling areas encompassing only one town, the CRTC decided to order 10-digit local dialing only in Yellowknife; Yukon, Nunavut, and the remainder of NWT, retain 7-digit local calls.

That leaves area code 807, the westernmost slice of Ontario, from Thunder Bay in the south all the way up to Fort Severn (ᐗᔕᐦᐅ ᐃᓂᓂᐗᐠ) in the far north. There are no 807-988-xxxx numbers, and thus no need to require 10-digit dialing for local calls. Nonetheless, for absolutely no discernible reason other than bureaucratic inertia, the CRTC ordered 807 to switch to 10D effective — now postponed to for Thunder Bay only. Northwestern Ontario won’t need an overlay for about twenty years, so this is a clear-cut case of Ottawa bureaucrats imposing a small but ubiquitous inconvenience on hundreds of thousands of people for absolutely no justifiable reason.

🇨🇦 Canada (français)

La province de Terre-Neuve-et-Labrador devait mettre en œuvre un recouvrement de l’indicatif 709 avec le nouvel indicatif 879, à compter du , mais en raison des conditions évolutives le CRTC a remis plusieurs fois le recouvrement, et enfin le remit indéfiniment. Cependant, désormais on prévoit le recouvrement mort-vivant officiellement le

La province du Nouveau-Brunswick devait mettre en œuvre un recouvrement de l’indicatif 506 avec le nouvel indicatif 428, à compter du , mais en raison des conditions évolutives le CRTC a remis le recouvrement. La date d’entrée en vigueur de a été remis encore jusqu’au . Le recouvrement est désormais en vigueur.

En fait, le Canada prévoit déjà recouvrir tous les indicatifs (sauf 867 et 807) avant début 2024. Le recouvrement de Terre-Neuve-et-Labrador (709) a été remis indéfiniment, mais désormais on le prévoit au début 2024. À partir de ce recouvrement, les seules régions du Canada sans recouvrements seront l’indicatif 867 — le Yukon, les T.N.O., et le Nunavut — et l’indicatif 807 — le nord-ouest de l’Ontario, y compris Thunder Bay. On élimina aussi les arrangements interprovinciaux de composition locale à 7 chiffres pour Labrador City et pour Wabush, et pour Campbellton, Nouveau-Brunswick, vers l’est du Québec. Ces arrangements ont pris lorsque Terre-Neuve-et-Labrador et le Nouveau-Brunswick mirent en œuvre la composition locale obligatoire à 10 chiffres pour se préparer à leurs propres recouvrements.

Le Canada a également décidé de mettre en place le numéro d’urgence 988 pour la prévention du suicide et pour les ressources en santé mental, à compter du . En 2022, dans seuls quatre indicatifs régionaux canadiens peut on composer un appel local avec 7 chiffres. Le Nouveau-Brunswick, l’indicatif régional 506, déjà prévoyait un recouvrement au début de 2023. Terre-Neuve-et-Labrador, l’indicatif 709, utilise certains numéros locaux de la forme 988-xxxx, donc on introduira la composition à 10 chiffres, même si la ville où se trouve le préfixe 988, a une population totale de 15 personnes. (Toutefois, étant donné que le recouvrement des 709 et 879, précédemment prévu pour 2028, a été avancé au début de 2024, c’est un point un peu discutable.)

Aux territoires du nord du Canada, au Yukon, au Nunavut, et aux Territoires du Nord-Ouest, indicatif 867, il y a également certains numéros locaux de la forme 988-xxxx, plus particulièrement à Yellowknife, T.N.O. Cependant, comme le nord est si peu peuplé et la plupart des zones d’appels locaux ne comprennent qu’une seule ville, donc la CRTC a décidé de commander la composition à 10 chiffres uniquement à Yellowknife; au Yukon, au Nunavut, et au reste des T.N.O., on pourra toujours composer seuls 7 chiffres.

Cela laisse l’indicatif 807, la tranche la plus à l’ouest de l’Ontario, de Thunder Bay au sud jusqu’au Fort Severn (ᐗᔕᐦᐅ ᐃᓂᓂᐗᐠ) dans l’extrême nord. Il n’y a point de numéros 807-988-xxxx, donc pas besoin d’exiger la composition à 10 chiffres pour les appels locaux. Néanmoins, pour absolument aucune raison discernable autre que l’inertie bureaucratique, la CRTC a ordonné au 807 de passer à la composition à 10 chiffres à compter du , mais la ville de Thunder Bay soi-même bénéficie d’un sursis jusqu’au . Le nord-ouest de l’Ontario n’aura pas besoin d’un recouvrement avant environ vingt ans, il s’agit donc d’un cas clair où bureaucrates d’Ottawa imposent un petit mais omniprésent inconvénient à des centaines de milliers de personnes sans aucune raison justifiable.

Time Zone information is now available on the “Locator” page, which lists all active and upcoming area codes in numeric order with major cities.