| Old | New | Area Affected | 10D/1+10D Dialing | Overlay | Test Number |
|---|---|---|---|---|---|
| 215 267 |
445 | PA: Philadelphia | — | 2018-03-03 | 445-990-TEST |
| 916 | 279 | CA: Sacramento | 2018-02-10 | 2018-03-10 | 279-279-1279 |
| 619 858 |
619 & 858 | CA: San Diego; (“boundary elimination overlay”: 619/858 geographic split boundary from 1999 has been erased, forming the new 619 & 858 overlay, effective 2018-06-19) | 2018-05-19 | 2018-06-19 | (none) |
| 805 | 820 | CA: San Luis Obispo, Oxnard | 2018-06-02 | 2018-06-30 | 820-820-1820 |
| 609 | 640 | NJ: Trenton, Atlantic City | 2018-08-18 | 2018-09-17 | 640-990-TEST |
| 418 581 |
367 | QC:
eastern Québec, Canada, including Québec city and Gaspé Peninsula •
l’est de la province de Québec, Canada, y compris
la ville de Québec et la Gaspésie |
—[*] | 2018-11-24 | 1–367 + (210, 410, 510, 610, 810, ou/or 999) + (–TEST/–8378 ou/or –BILL$/–2455$) |
| 876 | 658 | Jamaica: entire nation | 2019-03-30 | 2019-04-30 |
658-295-TEST 658-357-TEST 658-465-TEST 658-644-TEST |
| 604 250 778 236 |
672 | BC: entire province of British Columbia, Canada | — | 2019-05-04 | 1–672 + (580, 610, 710, 810, or/ou 999) + (–TEST/–8378 or/ou –BILL$/–2455$) |
| 407 321 |
689 | FL: Orlando; (area code 321 continues to be also a non-overlay code for the “Space Coast” area) | — | 2019-06-04 | 689-689-1689 |
| 500 etc. |
524 | non-geographic: more numbers for iPads, tablets, etc. — mostly non-dialable from ordinary phones | — | 2019-07-12 | (none) |
| 510 | 341 | CA: Oakland, Fremont, Richmond | 2019-06-22 | 2019-07-22 | 341-341-1341 |
| 205 | 659 | AL: Birmingham, Tuscaloosa | 2019-10-12 | 2019-11-12 | 659-659-1659 |
| 937 | 326 | OH: Dayton | 2020-02-08 | 2020-03-08 | 326-326-1326 |
| 803 | 839 | SC: Columbia, central | 2020-04-25 | 2020-05-26 | 839-839-1839 |
| 500 etc. |
525 | non-geographic: more numbers for iPads, tablets, etc. — mostly non-dialable from ordinary phones | — | 2020-07-13 | (none) |
| 214 etc. |
945 | TX: Dallas and suburbs; area code 945 will be added to 214 & 972 & 469 overlay | — | 2021-01-15 | 945-945-1945 |
| 500 etc. |
526 | non-geographic: more numbers for iPads, tablets, etc. — mostly non-dialable from ordinary phones | — | 2021-01-28 | (none) |
| 909 | 840 | CA: San Bernardino, Ontario | 2021-01-23 | 2021-02-23 | 840-840-1840 |
| 217 | 447 | IL: Champaign, Springfield | 2021-02-27 | 2021-03-27 | 447-447-1447 |
| 814 | 582 | PA: Altoona, Erie: originally scheduled as an overlay in 2002, then shelved, then scheduled as a split for 2012-02-01, with Erie changing to 582 and Altoona keeping 814, then shelved again. However, the overlay finally happened on 2021-05-01. | 2021-04-03 | 2021-05-01 | 582-990-TEST |
| 405 | 572 | OK: Oklahoma City | 2021-04-24 | 2021-05-24 | 572-572-1572 |
| 850 | 448 | FL: Tallahassee, Pensacola, panhandle | 2021-05-22 | 2021-06-22 | 448-448-1448 |
| 500 etc. |
527 | non-geographic: more numbers for iPads, tablets, etc. — mostly non-dialable from ordinary phones | — | 2021-09-29 | (none) |
| 306 639 |
474 | SK: entire province of Saskatchewan, Canada | — | 2021-10-02 |
1–474 + (210, 410, 610, or 810) + (–TEST/–8378 or/ou –BILL$/–2455$) |
| 905 etc. |
742 | ON: Toronto suburbs (not including the city of Toronto); the 905 & 289 & 365 overlay added 742 on 2021-10-16 | — | 2021-10-16 |
1–742 + (222, 610, or/ou 999) + –TEST/–8378 or/ou –BILL$/–2455$) |
| 202 | 771 | DC: the city of Washington, D.C. | 2021-10-09 | 2021-11-09 | 771-990-TEST |
| (multi) | — | Major change throughout the United States: A total of 82 U.S. area codes in 35 states (plus Guam) are changing to mandatory 10-digit or 1+10D dialing for local calls, phased in from 2021-10-24 through 2022-07-15, in preparation for the introduction of the national 988 suicide prevention lifeline. (More information on “The Big 10D”) | 2021-10-24 | 2022-07-15 | — |
| 708 | (464) | IL: La Grange, certain suburbs south or west of Chicago; (Originally approved in 1999, but not formally scheduled until July 2021, effective 2022-01-21. Note: 708 is already scheduled to convert to mandatory 1+10D local calling on 2021-10-24 as part of the Big 10D.) | 2021-10-24‡ | 2022-01-21 | 464-464-1464 |
| 813 | (656) | FL: Tampa; (postponed due to Covid-19) |
2022-01-22‡ |
2022-02-22 |
656-656-1656 |
| 404 770 etc. |
(943) | GA: Atlanta metro area; (The 404 & 770 & 678 & 470 overlay will add 943) | — | 2022-03-15 | 943-943-1943 |
| 613 343 |
(753) | ON: Ottawa; (originally planned for 2023-06-10, the date was advanced by more than a year, to 2022-03-26) (initialement prévu pour le 2023-06-10, le recouvrement fut avancé de plus d’un an jusqu’au 2022-03-26) | — | 2022-03-26 | 1-753-610 + (–TEST/–8378 or/ou –BILL$/–2455$) |
| 403 780 etc. |
(368) | AB:
entire province of Alberta, Canada, area codes
403, 780, 587, and 825; 368 overlay will be added on
|
— | 2022-04-23 | 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) | 2022-04-09‡ | 2022-05-09 | 948-990-TEST |
| 540 | (826) | VA: Roanoke, Harrisonburg, outer suburbs of Washington, D.C. | 2022-05-14‡ | 2022-06-14 | 826-990-TEST |
| 303 720 |
(983) | CO: Denver metro area | — | 2022-06-17 | 983-983-1983 |
| 705 249 |
(683) | ON: Sudbury, Peterborough | — | 2022-06-18 | 1–683–610 + –TEST/–8378) or/ou –BILL$/–2455$) |
| 209 | (350?) | CA: Stockton, Modesto; (The 209 area code was expected to run out of numbers around 2026 or 2027, but updated projections have advanced that date to late 2022. Relief planning is underway, with details expected soon. It will definitely be an overlay, though, because 209 already has to change to 1+10D local dialing as part of The Big 10D. The new area code has not been announced, but 350 is an educated guess.) | 2021-10-24‡ | 2022-Q2? | t.b.d. |
| 910 | (472) | NC: Wilmington, Fayetteville; (Area code 472 will overlay 910; date advanced by nearly 7 months) | 2021-10-24‡ | 2022-08-02 | 472-472-1472 |
| 314 | (557) | MO: St. Louis; (suspended in 2002, finally resurrected in 2021) | 2021-10-24‡ | 2022-08-12 | 557-557-1557 |
| 610 484 |
(835) | PA: Philadelphia suburbs | — | 2022-09-02 | 835-990-TEST |
| 480 602 623 |
480 602 623 |
AZ: Phoenix metro area; the boundaries from the 602/480/623 split will be 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 has mandatory 10D local calls due to The Big 10D | 2023-08-12 | 2023-09-12 | (none) |
| 514 438 |
(263) | QC: Montréal (city only, not including suburbs) • (la ville seulement, banlieue non incluse) | — | 2022-10-22 | 1-263 + (210 ou/or 610) + (–TEST/–8378 ou/or –BILL$/–2455$) |
| 450 579 |
(354) | QC: Laval, suburbs/banlieue of Montréal; officially confirmed • officiellement confirmé | — | 2022-10-22 | 1–354 + (580, 610, 710, 999) + (–TEST/–8378 ou/or –BILL$/–2455$) |
| 819 873 |
(468) | QC: Gatineau/Hull, central, western, and northern Québec • Gatineau/Hull, le centre, l’ouest, et le nord du Québec | — | 2022-10-22 | 1–468 + (210 or/ou 610) + —TEST(–8378) or/ou –BILL(–2455) |
| 204 431 |
(584?) | MB: entire/l’ensemble de la province; new area code and dates not yet confirmed • nouvel indicatif et dates non encore confirmés | — | 2022-10-29 [tentative/provisoire] |
t.b.a./AC |
| 561 | (728) | FL: Palm Beach County; exact date t.b.a., but Florida PSC order says “no later than 2023-Q1” | 2021-10-24‡ | 2022-Q4? | 728-728-1728 |
| 816 | (975) | MO: Kansas City; (suspended in 2002, finally resurrected in 2021) | 2021-10-24‡ | 2023-02-10 | 975-975-1975 |
| 309 | (861) | IL: Bloomington, Peoria, Quad Cities; effective date t.b.a. | 2021-10-24‡ | 2023-02-24 | t.b.a. |
| 516 | (363?) | NY: Nassau County (western Long Island); (The 516 area code is expected to run out of numbers in mid-2023, so relief planning is already underway. It will definitely be an overlay, since 516 is already scheduled to change to 10D local calling because of The Big 10D. The new overlay area code has not been officially announced; 363 is an educated guess.) | 2021-10-24‡ | 2023-Q1 ? | t.b.a. |
| 506 | (428) | NB:
entire province of New Brunswick, Canada • l’ensemble de la province du Nouveau-Brunswick |
2023-04-15 |
2023-04-29 |
|
| 519 etc. |
(382?) | ON: London, Windsor; new area code and dates not yet confirmed • nouvel indicatif et dates non encore confirmés | — | 2023-06-10 | t.b.a./AC |
| 707 | (369?) | CA: north coast of California, Santa Rosa, Napa, Eureka; (The 707 area code is expected to run out of numbers in late 2023, so relief planning is already underway. It will definitely be an overlay, since 707 is already scheduled to change to 10D local calling because of The Big 10D. The new overlay area code has not been officially announced; 627 and 369 were previously reserved for a planned three-way split of 707, but 627 is in use as a prefix, so 369 is a solid bet.) | 2021-10-24‡ | 2023-Q2 ? | t.b.a. |
| 870 | AR: Jonesboro, Pine Bluff, southern, eastern, north central (surrounds Little Rock on 3 sides) originally announced for 2013-05-18 but postponed indefinitely, estimated 2023-Q2; note: area code 870 is not affected by “The Big 10D” and will thus retain 7‑digit local calls until the overlay | 2023 ? | (suspended) 2023 ? |
327-327-1327 327-639-TEST |
|
| 513 | (283) | OH: Cincinnati; (Reinstated; exact dates not yet officially announced. 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, some time in mid-2023, exact dates t.b.a.) | 2021-10-24‡ | 2023-Q2? | t.b.a. |
| 301 240 |
(227) | MD: Silver Spring, suburbs of Washington, D.C.; (dates t.b.a.) | — | 2024 ? | t.b.a. |
| 313 734 |
(679) | MI: Detroit, Ann Arbor; (suspended; 679 will overlay 313, circa 2026, and expand to also overlay 734, circa 2038. Neither 313 nor 734 is affected by “The Big 10D.”) | 2026 ? | 2026 ? | t.b.a. |
| 920 | WI: Green Bay, northeastern; (originally scheduled for 2014, current projected implementation 2026-Q4 !) | 2021-10-24‡ |
|
274-274-1274 274-222-TEST |
|
| 440 | (tba) | OH: Lorain, Ashtabula; (new overlay area code not yet officially announced; relief postponed to about 2028) | 2021-10-24‡ | 2028 ? | t.b.a. |
| 618 | (730) | IL: East St. Louis, southern; (postponed) | 2021-10-24‡ | 2029 ? | t.b.a. |
| 709 | (879) | NL: entire province of Newfoundland & Labrador, Canada (postponed indefinitely) • l’ensemble de la province de Terre-Neuve-et-Labrador, Canada (remis indéfiniment) |
suspended |
suspendu |
1–879 + (610, 620, 630, 640, 710, 777, 888, or/ou 999) + (–TEST/–8378 or/ou –BILL$/–2455$) |