Area code overlays and relief plans
In an overlay, a new code serves the same area as an existing one, so neighbors can have different area codes and local calls need 10 digits. 154 overlay areas are in service; the largest has 8 codes. NANPA lists 15 relief plans in progress.
- 154 overlay areas in service
- 8 codes in the largest
- 15 relief plans in progress
Relief planning (NANPA)
| Codes | State | Status | Exhaust date | Prefixes left |
|---|---|---|---|---|
| 253 | WA | Trigger | 2Q2056 | 275 |
| 327, 870 | AR | Trigger | 3Q2057 | 743/0 |
| 425 | WA | Trigger | 1Q2044 | 153 |
| 479 | AR | Trigger | 1Q2037 | 212 |
| 501 | AR | Trigger | 3Q2044 | 147 |
| 502 | KY | Trigger | 1Q2029 | 45 |
| 509 | WA | Active | 3Q2029 | 21 |
| 580 | OK | Active | 3Q2029 | 38 |
| 626 | CA | Active | 1Q2030 | 51 |
| 657, 714 | CA | Active | 2Q2028 | 85/1 |
| 734 | MI | Suspended | 4Q2044 | 70 |
| 828 | NC | Active | 2Q2029 | 51 |
| 912 | GA | Active | 2Q2028 | 55 |
| 949 | CA | Active | 3Q2029 | 40 |
| 956 | TX | Active | 2Q2029 | 47 |
Source: NANPA, NPA database of Oct 24, 2026.
Overlay areas in service
Alabama
Newest code since November 12, 2019
Alabama
Newest code since July 10, 2010
Alabama
Newest code since February 23, 2026
Alberta
Newest code since April 23, 2022
Arizona
Newest code since March 1, 1999
Arkansas
Newest code since February 20, 2024
British Columbia
Newest code since May 24, 2025
British Columbia
Newest code since October 19, 1996
British Columbia
Newest code since 1947
California
Newest code since November 28, 2022
California
Newest code since November 1, 2024
California
Newest code since March 10, 2018
California
Newest code since August 26, 2006
California
Newest code since July 22, 2019
California
Newest code since March 26, 2025
California
Newest code since February 1, 2023
California
Newest code since November 20, 2012
California
Newest code since March 21, 2015
California
Newest code since November 21, 2009
California
Newest code since January 31, 2025
California
Newest code since June 12, 1999
California
Newest code since September 23, 2008
California
Newest code since May 18, 2009
California
Newest code since June 30, 2018
California
Newest code since February 23, 2021
Colorado
Newest code since June 17, 2022
Colorado
Newest code since July 7, 2025
Connecticut
Newest code since December 12, 2009
Connecticut
Newest code since August 30, 2014
District of Columbia
Newest code since November 9, 2021
Dominican Republic
Newest code since July 1, 2009
Florida
Newest code since August 4, 2023
Florida
Newest code since June 4, 2019
Florida
Newest code since February 26, 2024
Florida
Newest code since June 22, 2021
Florida
Newest code since March 10, 2023
Florida
Newest code since February 22, 2022
Florida
Newest code since August 1, 2001
Georgia
Newest code since March 15, 2022
Georgia
Newest code since February 26, 2010
Georgia
Newest code since 1947
Georgia
Newest code since August 1, 1995
Georgia
Newest code since 1954
Georgia
Newest code since May 16, 2006
Idaho
Newest code since September 5, 2017
Illinois
Newest code since March 27, 2021
Illinois
Newest code since January 5, 2002
Illinois
Newest code since February 24, 2023
Illinois
Newest code since November 7, 2009
Illinois
Newest code since 1947
Illinois
Newest code since October 7, 2007
Illinois
Newest code since January 21, 2022
Illinois
Newest code since July 7, 2023
Illinois
Newest code since October 12, 1996
Illinois
Newest code since March 17, 2007
Indiana
Newest code since November 15, 2016
Indiana
Newest code since March 7, 2015
Jamaica
Newest code since April 30, 2019
Kentucky
Newest code since March 3, 2014
Kentucky
Newest code since 1947
Louisiana
Newest code since September 25, 2025
Manitoba
Newest code since October 29, 2022
Maryland
Newest code since June 14, 2023
Maryland
Newest code since March 24, 2012
Massachusetts
Newest code since May 2, 2001
Massachusetts
Newest code since May 2, 2001
Massachusetts
Newest code since May 2, 2001
Massachusetts
Newest code since May 2, 2001
Michigan
Newest code since September 7, 2002
Michigan
Newest code since November 7, 2025
Michigan
Newest code since December 13, 1997
Minnesota
Newest code since August 30, 2024
Mississippi
Newest code since January 30, 2026
Mississippi
Newest code since March 14, 2005
Missouri
Newest code since March 24, 2024
Missouri
Newest code since August 12, 2022
Missouri
Newest code since October 13, 2023
Nebraska
Newest code since March 26, 2011
Nevada
Newest code since June 3, 2014
New Brunswick
Newest code since April 29, 2023
New Jersey
Newest code since December 29, 2001
New Jersey
Newest code since September 17, 2018
New Jersey
Newest code since December 29, 2001
New Jersey
Newest code since December 29, 2001
New York
Newest code since January 1, 1992
New York
Newest code since June 10, 2017
New York
Newest code since March 11, 2017
New York
Newest code since March 24, 2023
New York
Newest code since June 18, 2026
New York
Newest code since January 20, 2023
New York
Newest code since September 19, 2017
New York
Newest code since November 16, 2023
New York
Newest code since July 16, 2016
Newfoundland and Labrador
Newest code since February 17, 2024
North Carolina
Newest code since May 23, 2016
North Carolina
Newest code since October 7, 2022
North Carolina
Newest code since April 1, 2001
North Carolina
Newest code since April 30, 2012
Nova Scotia and Prince Edward Island
Newest code since November 30, 2014
Ohio
Newest code since April 22, 2015
Ohio
Newest code since October 30, 2000
Ohio
Newest code since April 28, 2023
Ohio
Newest code since March 8, 2020
Ohio
Newest code since February 27, 2016
Ohio
Newest code since January 1, 2002
Ohio
Newest code since March 1, 2024
Oklahoma
Newest code since May 24, 2021
Oklahoma
Newest code since April 1, 2011
Ontario
Newest code since June 17, 2023
Ontario
Newest code since June 18, 2022
Ontario
Newest code since October 16, 2021
Ontario
Newest code since March 26, 2022
Ontario
Newest code since March 25, 2013
Ontario
Newest code since April 26, 2025
Oregon
Newest code since February 10, 2010
Oregon
Newest code since October 1, 2000
Pennsylvania
Newest code since March 3, 2018
Pennsylvania
Newest code since September 26, 2017
Pennsylvania
Newest code since October 21, 2013
Pennsylvania
Newest code since August 17, 2001
Pennsylvania
Newest code since 1947
Pennsylvania
Newest code since September 2, 2022
Pennsylvania
Newest code since May 1, 2021
Pennsylvania
Newest code since February 1, 1998
Puerto Rico
Newest code since September 15, 2001
Quebec
Newest code since October 22, 2022
Quebec
Newest code since October 22, 2022
Quebec
Newest code since November 24, 2018
Quebec
Newest code since October 22, 2022
Saskatchewan
Newest code since October 2, 2021
South Carolina
Newest code since May 26, 2020
South Carolina
Newest code since August 19, 2024
South Carolina
Newest code since October 19, 2015
Tennessee
Newest code since September 5, 2025
Tennessee
Newest code since March 28, 2015
Texas
Newest code since October 23, 2017
Texas
Newest code since January 15, 2021
Texas
Newest code since January 23, 2025
Texas
Newest code since January 16, 1999
Texas
Newest code since February 15, 2003
Texas
Newest code since July 1, 2013
Texas
Newest code since October 7, 2000
Utah
Newest code since March 29, 2009
Virginia
Newest code since June 14, 2022
Virginia
Newest code since March 1, 2000
Virginia
Newest code since February 1, 2024
Virginia
Newest code since May 9, 2022
Washington
Newest code since August 28, 2017
Washington
Newest code since 1947
Washington
Newest code since January 15, 1995
West Virginia
Newest code since March 28, 2009
Wisconsin
Newest code since May 5, 2023
Wisconsin
Newest code since September 15, 2023
Wisconsin
Newest code since August 14, 2010