North American Numbers Source-cited · ownership disclosed
Area code
283
In service
United States · since 2023

Cincinnati (overlay)

All-service overlay of area code 513 covering the Cincinnati metro and southwestern Ohio. Became available to carriers in April 2023.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Cincinnati (overlay)
Type
geographic
Status
in service
In service since
2023
Projected exhaust
2073 Q3

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 283 is

Southwestern Ohio, coextensive with area code 513 (Cincinnati metro).

Communities served wholly or partly by 283:

CincinnatiHamiltonMiddletownMasonWest ChesterNorwood

Serves the full 513 footprint; representative list.

B · Relationships

How it relates to other codes

The codes 283 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?

Overlay · 2023 513 Cincinnati All-service overlay sharing the 513 numbering plan area.
What's changing. Overlay of 513, in service since April 28, 2023.
C · History

How 283 got here

2000
Originally reserved as an overlay for 513 (permissive dialing began Jan 15, 2001) but implementation was suspended.
Source: Wikipedia: Area codes 513 and 283
2021-12-15
PUCO approved the 283 all-service overlay complex for the 513 NPA.
Source: PUCO / Wikipedia: Area codes 513 and 283
2023-04-28
Became available to carriers (put into service by NANPA).
Source: Wikipedia: Area codes 513 and 283
D · Capacity

How full it is

Prefixes assigned
62
Prefixes available
738
Thousands-blocks assigned
376

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

Compare 283 with another code →
Sources
Wikipedia ↗
Area codes 513 and 283
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.