Area code 937
Where 937 is, how it is dialed, which carriers hold its numbers and how many of its codes are in use, from NANPA's 10/01/2026 files.
- State
- OH
- In service
- 1996
- Assigned codes
- 780of 800 possible
- Carriers
- 48
About area code 937
NANPA lists 937 as an in-service geographic area code for Ohio, first put into service on September 28, 1996. It is an overlay: 937 and 326 cover the same territory, so neighbors on the same street can have different area codes. It is in the Eastern time zone. The places with the most assigned exchanges include Dayton, Springfield, Xenia, Bellefontaine, and Marysville. By population, its largest named places are Dayton, Springfield, Liberty, Fairborn, and Franklin.
| Item | Value |
|---|---|
| State | Ohio |
| In service since | September 28, 1996 |
| Assigned by NANPA | June 28, 1996 |
| Overlay | Yes, with 326 |
| Parent area code (NANPA) | 513 |
| Time zone | Eastern |
| Local calls within the code | ten digits (area code plus number) |
| Assigned central office codes | 780 |
| Rate centers with codes | 123 |
| Carriers holding codes | 48 |
| Pooled codes | 544 |
| Codes assigned since 2020 | 37 |
| Relief planning in progress | No |
Source: NANPA NPA report and utilized central office code file, both dated 10/01/2026.
Places served by 937
937 holds 11% of the 7,301 central office codes assigned in Ohio, the 5th most of the state's 15 codes. 103 Census places could be matched to rate centers with 937 exchanges; the most populous are Dayton (136,000), Springfield (58,138), Liberty (45,529), and Fairborn (35,105). Each place page lists the exact prefixes and carriers for that town.
| Place | Population (2024) | Area codes | Exchanges | Carriers |
|---|---|---|---|---|
| Dayton, OH | 136,346 | 326, 937 | 263 | 39 |
| Springfield, OH | 58,138 | 326, 937 | 45 | 13 |
| Liberty, OH | 45,529 | 326, 937 | 4 | 4 |
| Fairborn, OH | 35,105 | 326, 937 | 17 | 10 |
| Franklin, OH | 33,007 | 326, 937 | 11 | 8 |
| Marysville, OH | 29,276 | 326, 937 | 19 | 9 |
| Troy, OH | 27,122 | 937 | 13 | 7 |
| Centerville, OH | 26,311 | 326, 740, 937 | 9 | 8 |
| Xenia, OH | 26,067 | 937 | 19 | 10 |
| Trotwood, OH | 23,073 | 326, 937 | 8 | 4 |
| Piqua, OH | 20,940 | 326, 937 | 16 | 9 |
| Sidney, OH | 20,392 | 326, 937 | 19 | 10 |
| Greenville, OH | 17,044 | 937 | 15 | 8 |
| Vandalia, OH | 15,013 | 326, 937 | 14 | 9 |
| Urbana, OH | 14,192 | 326, 937 | 8 | 5 |
Population: Census Vintage 2024 estimates for the matched place. Exchanges and carriers: NANPA utilized code file.
Ten-digit and seven-digit dialing in 937
According to NANPA's dialing-plan data, local calls within 937 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits. Because local calls need the area code, business cards, signage and website copy should always show the full ten-digit number. NANPA's dialing-plan note for this code reads: "1+10 digit permissible required excluding CMRS providers"
Who holds 937 exchanges
48 carriers hold the 780 central office codes assigned in 937. Ohio Bell Tel CO has the most, with 159 (20%). 544 of the codes (70%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. The code holder is not necessarily the carrier serving a given number today, since numbers can be ported between providers.
| Carrier (NANPA operating company) | Exchanges | Share |
|---|---|---|
| Ohio Bell Tel CO | 159 | 20% |
| New Cingular Wireless PCS, LLC - Il | 73 | 9.4% |
| T-mobile USA, INC. | 64 | 8.2% |
| Cellco Partnership d/b/a Verizon Wireless - Oh | 61 | 7.8% |
| Brightspeed of Northwest Ohio, INC. | 55 | 7.1% |
| Level 3 Communications, LLC - Oh | 53 | 6.8% |
| Frontier North, INC. - Oh | 53 | 6.8% |
| TWC Ip Enabled Services, LLC | 32 | 4.1% |
| Paetec Itel, LLC | 25 | 3.2% |
| Onvoy, LLC - Oh | 19 | 2.4% |
| Bandwidth.com CLEC, LLC - Oh | 17 | 2.2% |
| Level 3 Telecom of Ohio, LLC - Oh | 16 | 2.1% |
Carrier names are the operating company (OCN) names on NANPA's utilized central office code file dated 10/01/2026. A carrier holding a code may port numbers to other carriers.
Local calling areas in 937
NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 937 has codes in 123 rate centers. Rate center names in the file are abbreviations; where one matches a Census place, the table links to that city's local-number page.
| Rate center (NANPA) | Place | Codes |
|---|---|---|
| DAYTON | Dayton, OH | 251 |
| SPRINGFLD | Springfield, OH | 42 |
| BEAVERCREK | not matched | 19 |
| XENIA | Xenia, OH | 19 |
| BELLEFNTAN | Bellefontaine, OH | 18 |
| MARYSVILLE | Marysville, OH | 17 |
| WILMINGTON | Wilmington, OH | 17 |
| SIDNEY | Sidney, OH | 17 |
| FAIRBORN | Fairborn, OH | 15 |
| PIQUA | Piqua, OH | 15 |
| GREENVILLE | Greenville, OH | 15 |
| TROY | Troy, OH | 13 |
| MSBGWCRLTN | not matched | 12 |
| VANDALIA | Vandalia, OH | 12 |
| HILLSBORO | Hillsboro, OH | 11 |
| NEWCARLISL | New Carlisle, OH | 11 |
| GEORGETOWN | Georgetown, OH | 9 |
| ENON | Enon, OH | 9 |
| FRANKLIN | Franklin, OH | 9 |
| EATON | Eaton, OH | 8 |
| URBANA | Urbana, OH | 7 |
| TROTWOOD | Trotwood, OH | 6 |
| TIPP CITY | Tipp City, OH | 6 |
| WEST UNION | West Union, OH | 5 |
| CENTERVLLE | Centerville, OH | 5 |
Top 25 of 123 rate centers.
Number supply in 937
An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 780 are assigned in 937, 98% of 800. 37 were assigned in 2020 or later.
| Decade assigned | Exchanges | Share |
|---|---|---|
| 2000s | 155 | 54% |
| 2010s | 97 | 34% |
| 2020s | 37 | 13% |
Assignment dates as recorded in NANPA's utilized code file; codes without a recorded date are excluded.
A local 937 number on Callata
Callata Office costs $99 per month for up to 5 people, and each additional user is $20 a month. That covers up to 3 local numbers, calling from a browser or your cell, transcribed voicemail, recorded calls with AI summaries, after-hours routing and E911 on each number.
Porting a number you already use in area code 937 is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.
AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.
Frequently asked questions
Where is area code 937?
937 is a geographic area code in Ohio. Places with the most assigned exchanges include Dayton, Springfield, Xenia, and Bellefontaine.
What time zone is area code 937 in?
NANPA lists 937 in the Eastern time zone.
When did area code 937 go into service?
NANPA records an in-service date of September 28, 1996. The code was assigned on June 28, 1996.
Is 937 an overlay area code?
Yes. It shares its territory with 326.
Can my business get a 937 phone number?
Callata includes up to 3 local numbers on its $99/month plan (5 users included). Which 937 numbers are open depends on carrier inventory when you choose, and you can port an existing number for free.