North American Numbers Source-cited · ownership disclosed
Area code
937
In service
United States · since 1996

Dayton/Springfield

Serves the Dayton and Springfield region of southwestern-central Ohio. Created in 1996 by splitting from Cincinnati's 513.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Dayton/Springfield
Type
geographic
Status
in service
In service since
1996
Projected exhaust
2083 Q4

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 937 is

Southwestern-central Ohio (Dayton metro and Springfield, ~20 counties).

Communities served wholly or partly by 937:

DaytonSpringfieldKetteringHuber HeightsFairborn

Representative; spans ~20 counties (wholly or partially) incl. Montgomery, Greene, Warren, Clinton.

B · Relationships

How it relates to other codes

The codes 937 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Split from · 1996 513 Cincinnati Split from 513 (Cincinnati).
Overlay · 2020 326 Dayton/Springfield (overlay) 326 overlays the 937 area.
What's changing. Overlaid by 326 since March 2020; ten-digit dialing required.
C · History

How 937 got here

1996-09-28
Created via split of 513; "937" spells "YES" on a phone keypad.
Source: Wikipedia: Area codes 937 and 326
2020-03
Overlaid by area code 326; ten-digit dialing required.
Source: Wikipedia: Area codes 937 and 326
D · Capacity

How full it is

Prefixes assigned
797
Prefixes available
3
Thousands-blocks assigned
3,546

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 937 with another code →
Sources
Wikipedia ↗
Area codes 937 and 326
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.