Area Code 326
Ohio
Area code 326 serves Ohio, primarily Dayton, in the Eastern Time (ET) time zone. It is an overlay area code sharing territory with area code 937.
Overlay Area Code
This area code is part of an overlay region, meaning the same geographic area is served by multiple area codes. Overlay codes were introduced to meet growing demand for phone numbers without requiring existing customers to change their numbers.
This area code shares its geographic region with: area code 937 (Dayton).
In service since: 08-Mar-2020
Demographics & Economics
- Total Population
- 2,609,933
- Population Density
- 138 people/sq miabove U.S. average (U.S.: 93 people/sq mi)
- Median Household Income
- $65,344below U.S. median (U.S.: $75,144)
- Poverty Rate
- 12.3%near U.S. average (U.S.: 11.5%)
- Unemployment Rate
- 4.5%above U.S. average (U.S.: 3.6%)
- Education Attainment
- Bachelor's Degree+23.4%below U.S. average (U.S.: 33.7%)High School or Lower40.6%
Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.
See how this area code compares to all US area codes in the Statistics dashboard.
Time Zone
- Eastern Time (ET)
NANPA Relief Status
According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.
Source: NANPA NPA Relief Planning Reports · See all relief planning statuses
Current Time
Prefix Utilization
Geographic Coverage
State
OH
Major Cities
- Dayton
- Springfield
- Kettering
- Beavercreek
- Huber Heights
- Fairborn
- Troy
- Marysville
- Xenia
- Centerville
- Riverside
- Trotwood
- Piqua
- Sidney
- Miamisburg
- Springboro
- Vandalia
- Bellefontaine
- Englewood
- Clayton
- West Carrollton
- Greenville
- Wilmington
- Franklin
and 148 more cities
Historical Timeline of Area Code 326
Area code 326 went into service on March 8, 2020, as an all-services overlay for area code 937, which serves southwestern Ohio including Dayton, Springfield, and Wright-Patterson Air Force Base. The Public Utilities Commission of Ohio (PUCO) approved the overlay on May 23, 2018, under Case No. 17-2329-TP-COI, and new 326 numbers were assigned starting March 8, 2020. The 937 area code was created on September 28, 1996, split from area code 513, one of the original 86 area codes assigned in 1947. (PUCO)
Key milestones:
- 1947: Area code 513 created as one of the original 86 area codes, covering the southwestern quadrant of Ohio including Cincinnati and Dayton.
- September 28, 1996: Area code 937 created in a split of 513 due to exhaustion from the proliferation of cell phones, pagers, and fax machines. The digits 937 spell "YES" on a telephone keypad, used in promotional campaigns. (Wikipedia)
- April 2018: NANPA 2018-1 NRUF and NPA Exhaust Analysis projected 937 central office codes would be exhausted by Q3 2020. (PUCO)
- May 23, 2018: PUCO in Case No. 17-2329-TP-COI approved an all-services overlay as the relief method for the 937 NPA. (PUCO Press Release)
- July 3, 2018: NANPA published Planning Letter PL-517 documenting the overlay of NPA 326 onto NPA 937. The area code 326 translates to "DAO" on the alphanumeric dial pad, short for "DAyton, Ohio". (PUCO)
- February 11, 2019: Network preparation and customer education period began for the 937/326 overlay.
- August 10, 2019: Permissive dialing period began. Subscribers could dial local calls using either 7 or 10/11 digits within the overlay area.
- December 8, 2019: Test number 326-326-1326 was activated for network testing of the new area code. (PUCO)
- January 2, 2020: Earliest date central office codes in the new 326 NPA could be ordered through NANPA.
- February 8, 2020: Mandatory 10-digit/11-digit local dialing took effect. Seven-digit dialing ended within the 937/326 overlay area.
- March 8, 2020: Area code 326 went into service. New telephone lines or services began being assigned numbers using the 326 area code. (PUCO)
The 937/326 overlay covers a 20+ county region in southwestern Ohio. The combined numbering pool is projected to last through Q3 2057. (PUCO)
Regulatory History
Area code 326 was authorized through state-level regulatory action by the Public Utilities Commission of Ohio (PUCO), with NANPA coordination for numbering plan implementation. The PUCO approved an all-services overlay as the relief method for the 937 NPA on May 23, 2018, under Case No. 17-2329-TP-COI. (Source: PUCO)
| Year | Event | Docket | Regulatory Action & Impact |
|---|---|---|---|
| 2018 | NANPA Exhaust Analysis | 2018-1 NRUF | NANPA projected 937 central office codes would be exhausted by Q3 2020, triggering the need for area code relief. (PUCO) |
| 2018 | PUCO Overlay Approval | Case No. 17-2329-TP-COI | PUCO approved an all-services overlay as the relief method for NPA 937, assigning new NPA 326 to serve the same geographic area. (PUCO Press Release) |
| 2018 | NANPA Planning Letter | PL-517 | NANPA published Planning Letter PL-517 documenting the 326 overlay of 937 and setting the implementation timeline. (PUCO) |
| 2020 | 326 In-Service | N/A | Area code 326 went into service on March 8, 2020, with mandatory 10-digit dialing effective February 8, 2020. The FCC mandates 10-digit dialing with all-services overlays to maintain a level competitive environment for new telephone companies. (PUCO) |
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 326).
| County | Population | Share |
|---|---|---|
| Montgomery, OH | 675,646 | 27.2% |
| Greene, OH | 328,382 | 13.2% |
| Miami, OH | 217,320 | 8.7% |
| Clark, OH | 214,063 | 8.6% |
| Warren, OH | 155,162 | 6.2% |
| Champaign, OH | 113,388 | 4.6% |
| Brown, OH | 84,492 | 3.4% |
| Darke, OH | 79,944 | 3.2% |
| Highland, OH | 77,784 | 3.1% |
| Shelby, OH | 77,289 | 3.1% |
| Preble, OH | 71,402 | 2.9% |
| Clinton, OH | 63,713 | 2.6% |
| Logan, OH | 56,342 | 2.3% |
| Union, OH | 51,285 | 2.1% |
| Delaware, OH | 37,582 | 1.5% |
| Adams, OH | 33,202 | 1.3% |
| Pike, OH | 31,595 | 1.3% |
| Fayette, OH | 27,049 | 1.1% |
| Clermont, OH | 22,485 | 0.9% |
| Butler, OH | 12,230 | 0.5% |
| Auglaize, OH | 11,602 | 0.5% |
| Hardin, OH | 11,185 | 0.4% |
| Madison, OH | 10,397 | 0.4% |
| Ross, OH | 10,179 | 0.4% |
| Scioto, OH | 9,405 | 0.4% |
| Mercer, OH | 3,386 | 0.1% |
Area Code 326 Family Tree
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Area code 326 was originally assigned in 08-Mar-2020 to serve OH.
Call Context
This area code covers a metropolitan region in OH with moderate to high population density, centered on Dayton and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 326.
Other Area Codes in Ohio
Area codes that also serve Ohio, linked for easy comparison.