Area code
937
937 is a United States area code. Under the North American Numbering Plan it belongs to Ohio, which has 15 area codes in total.
Validate a number in 937
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
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Area code 937 at a glance
NANPA lists 780 central office codes (prefixes) in use in area code 937, held by 48 holders across 123 rate centers.
| Fact | Value |
|---|---|
| In service since | 1996-09-28 |
| Time zone | Eastern (E) |
| Assigned overlays | 326 (2020-03-08) |
| Prefixes in use | 780 |
| Pooled prefixes | 544 (70%) |
| Rate centers | 123 |
| Companies holding prefixes | 48 |
| Assignment dates on file | 2001-01-24 to 2024-04-04 (289 prefixes) |
| ZIP codes in its places | 116 |
Rate centers in area code 937
| Rate center | Prefixes | Share |
|---|---|---|
| DAYTON | 251 | 32% |
| SPRINGFLD | 42 | 5% |
| BEAVERCREK | 19 | 2% |
| XENIA | 19 | 2% |
| BELLEFNTAN | 18 | 2% |
| MARYSVILLE | 17 | 2% |
| SIDNEY | 17 | 2% |
| WILMINGTON | 17 | 2% |
| 115 other rate centers | 380 | 49% |
Who holds the prefixes in 937
Ohio Bell Tel holds the most prefixes, 159 (20%). 70% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| Holder | Prefixes | Share |
|---|---|---|
| Ohio Bell Tel | 159 | 20% |
| New Cingular Wireless PCS | 73 | 9% |
| T-Mobile USA | 64 | 8% |
| Verizon Wireless | 61 | 8% |
| Brightspeed Of Northwest Ohio | 55 | 7% |
| Frontier North | 53 | 7% |
| 42 other carriers | 315 | 40% |
A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company. Find which carrier a number is on, or browse the prefix holders.
History of area code 937
- 1947-01-01 Area code 513, named as the parent of 937 in the NANPA report, was in service.
- 1996-09-28 Area code 937 went into service.
- 2020-03-08 Area code 326 went into service as an overlay in the same area as 937.
Area codes nearest to 937
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
- 283 about 44 mi
- 513 about 44 mi
- 380 about 59 mi
- 614 about 59 mi
- 220 about 95 mi
Overlay codes in the same area
ZIP codes in area code 937
116 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Dayton, OH | 43 |
| Marysville, OH | 2 |
| Sidney, OH | 2 |
A ZIP code and an area code are unrelated systems. A ZIP code can sit in more than one area code, and an area code spans many ZIP codes.
Complaints on file for 937 numbers
2,679 FCC complaints are on file for 2,308 numbers in 937, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 149 |
| 2024 | 130 |
| 2025 | 127 |
Other area codes in Ohio
Ohio is one state with 15 area codes in the NANPA table. 937 is one of them.
Next to 937 in the numbering table
These are the codes just before and after 937 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 937 was first assigned in Ohio. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in Ohio next to a 937 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 937
Where is area code 937?
NANPA assigns area code 937 to Ohio, United States.
In which state does area code 937 sit?
Ohio. 937 is one of 15 area codes the NANPA table assigns to the state.
Which places does area code 937 cover?
The places with the most ZIP codes among the rate centers in 937 are Dayton, OH, Marysville, OH and Sidney, OH. The rate center list on this page shows all of them.
Who owns area code 937?
NANPA assigns area codes. Within 937, Ohio Bell Tel holds the most prefixes, 159 prefixes or 20%.
Which time zone does 937 use?
The NANPA NPA report lists the time zone for 937 as Eastern (E).
What year did 937 enter service?
The NANPA NPA report gives an in-service date of 1996-09-28, so 937 has been in use since 1996.
Does area code 937 have an overlay?
Yes. 326 (in service 2020-03-08) shares the same area with 937, so numbers from all of them are local to each other.
Which area codes are nearest to 937?
The area codes closest to 937, measured between the centers of the ZIP code places they serve, are 283 (about 44 miles), 513 (about 44 miles), 380 (about 59 miles), 614 (about 59 miles) and 220 (about 95 miles).
How many prefixes does area code 937 have?
NANPA's report dated 2026-10-17 lists 780 prefixes in service in 937, spread over 123 rate centers and 48 holders.
Are there complaints about 937 numbers?
The FCC data on file has 2,679 complaints for 2,308 numbers in 937. They are unverified consumer reports. A number with no complaints on file is not proven safe.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.