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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.

Area code 937: NANPA facts
ItemValue
StateOhio
In service sinceSeptember 28, 1996
Assigned by NANPAJune 28, 1996
OverlayYes, with 326
Parent area code (NANPA)513
Time zoneEastern
Local calls within the codeten digits (area code plus number)
Assigned central office codes780
Rate centers with codes123
Carriers holding codes48
Pooled codes544
Codes assigned since 202037
Relief planning in progressNo

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.

Most populous places with 937 exchanges
PlacePopulation (2024)Area codesExchangesCarriers
Dayton, OH136,346326, 93726339
Springfield, OH58,138326, 9374513
Liberty, OH45,529326, 93744
Fairborn, OH35,105326, 9371710
Franklin, OH33,007326, 937118
Marysville, OH29,276326, 937199
Troy, OH27,122937137
Centerville, OH26,311326, 740, 93798
Xenia, OH26,0679371910
Trotwood, OH23,073326, 93784
Piqua, OH20,940326, 937169
Sidney, OH20,392326, 9371910
Greenville, OH17,044937158
Vandalia, OH15,013326, 937149
Urbana, OH14,192326, 93785

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.

Largest code holders in area code 937
Carrier (NANPA operating company)ExchangesShare
Ohio Bell Tel CO15920%
New Cingular Wireless PCS, LLC - Il739.4%
T-mobile USA, INC.648.2%
Cellco Partnership d/b/a Verizon Wireless - Oh617.8%
Brightspeed of Northwest Ohio, INC.557.1%
Level 3 Communications, LLC - Oh536.8%
Frontier North, INC. - Oh536.8%
TWC Ip Enabled Services, LLC324.1%
Paetec Itel, LLC253.2%
Onvoy, LLC - Oh192.4%
Bandwidth.com CLEC, LLC - Oh172.2%
Level 3 Telecom of Ohio, LLC - Oh162.1%

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 centers in area code 937 by assigned codes
Rate center (NANPA)PlaceCodes
DAYTONDayton, OH251
SPRINGFLDSpringfield, OH42
BEAVERCREKnot matched19
XENIAXenia, OH19
BELLEFNTANBellefontaine, OH18
MARYSVILLEMarysville, OH17
WILMINGTONWilmington, OH17
SIDNEYSidney, OH17
FAIRBORNFairborn, OH15
PIQUAPiqua, OH15
GREENVILLEGreenville, OH15
TROYTroy, OH13
MSBGWCRLTNnot matched12
VANDALIAVandalia, OH12
HILLSBOROHillsboro, OH11
NEWCARLISLNew Carlisle, OH11
GEORGETOWNGeorgetown, OH9
ENONEnon, OH9
FRANKLINFranklin, OH9
EATONEaton, OH8
URBANAUrbana, OH7
TROTWOODTrotwood, OH6
TIPP CITYTipp City, OH6
WEST UNIONWest Union, OH5
CENTERVLLECenterville, OH5

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.

Area code 937: central office codes by decade assigned
Decade assignedExchangesShare
2000s15554%
2010s9734%
2020s3713%

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.