This is a list of future area codes in the North American Numbering Plan, which are intended to be used as needed for additional telephone numbers in various locations. Relief formats and dates are subject to change.
New area code | Where | Affected area codes | Exhaust date* | Format | Effective date |
---|---|---|---|---|---|
227 | Maryland | 240, 301 | 2022 - 1st Qtr | Overlay | None |
272 | Pennsylvania | 570 | 2012 - 3rd Qtr | Overlay | None |
274 | Wisconsin | 920 | 2014 - 2nd Qtr | Overlay | February 22, 2014 |
283 | Ohio | 513 | 2020 - 2nd Qtr | Overlay | None |
327 | Arkansas | 870 | 2015 - 1st Qtr | Overlay | May 18, 2013 |
365 | Ontario | 289, 905 | 2015 - 2nd Qtr | Overlay | March 25, 2013 |
369 | California | 707 | 2017 - 4th Qtr | Split (3 way) | None |
380 | Ohio | 614 | 2019 - 2nd Qtr | Overlay | None |
431 | Manitoba | 204 | 2012 - 3rd Qtr | Overlay | November 3, 2012 |
437 | Ontario | 416/647 | 2013 - 1st Qtr | Overlay | |
447 | Illinois | 217 | 2013 - 3rd Qtr | Overlay | None |
464 | Illinois | 708 | 2014 - 3rd Qtr | Overlay | None |
557 | Missouri | 314 | 2021 - 1st Qtr | Overlay | None |
564 | Washington | 360 | 2014 - 1st Qtr | Overlay† | None |
582 | Pennsylvania | 814 | 2015 - 1st Qtr | TBD[1] | None |
627 | California | 707 | 2017 - 4th Qtr | Split (3 way) | None |
628 | California | 415 | 2017 - 2nd Qtr | Overlay | None |
639 | Saskatchewan | 306 | 2013 - 2nd Qtr | Overlay | May 25, 2013 |
659 | Alabama | 205 | 2014 - 4th Qtr | Overlay | None |
667 | Maryland | 410, 443 | 2012 - 2nd Qtr | Overlay | March 24, 2012 |
669 | California | 408 | 2012 - 4th Qtr | TBD[2] | None |
679 | Michigan | 313 | 2020 - 1st Qtr | Overlay | None |
689 | Florida | 407 | 2013 - 4th Qtr | Overlay | None |
730 | Illinois | 618 | 2014 - 2nd Qtr | Overlay | None |
737 | Texas | 512 | 2014 - 2nd Qtr | Overlay | None |
764 | California | 650 | 2022 - 3rd Qtr | Overlay | None |
873 | Quebec | 819 | 2012 - 4th Qtr | Overlay | June 1, 2013 |
935 | California | 619 | 2017 - 2nd Qtr | Split | None |
959 | Connecticut | 860 | 2012 - 3rd Qtr | Overlay | None |
975 | Missouri | 816 | 2020 - 3rd Qtr | Overlay | None |
984 | North Carolina | 919 | 2012 - 3rd Qtr | Overlay | April 30, 2012 [3] |
†Indicates planned overlay of multiple area code regions (i.e. not all area codes in the complex serve all areas).
*Indicates exhaust date of the existing area code(s) that will require relief. Others with exhaust dates within 4 years (i.e. by October 2015) that currently do not have an approved relief plan and relief area code: 270, 315, 336, 603, 609, 610/484, 615, 662, 713/281/832, 717, 740, 803, 812, 843, 850.[4]