Ohio · Eastern Time
283 Area Code
Area code 283 is in Ohio, serving southwestern Ohio, including Cincinnati, Hamilton and Middletown. It is in the Eastern Time zone. It shares its territory with overlay code 513, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 283 area code?
283 is a Ohio area code covering southwestern Ohio, including Cincinnati, Hamilton and Middletown. In the wider directory it sits in the Midwest region.
Cities in the 283 area code
- Cincinnati
- Hamilton
- Middletown
- Fairfield
- West Chester
- Mason
- Lebanon
- Oxford
- Norwood
- Blue Ash
- Sharonville
- Loveland
- Milford
- Forest Park
Counties served by 283
Hamilton County, Butler County, Warren County and Clermont County.
283 overlay codes and dialing
The 283 territory is covered by an overlay of 2 area codes: 283, 513. All of them serve the same geographic area, and the original code is 513. Because more than one code covers the same ground, 10-digit dialing is mandatory — you must dial the area code for every local call. New phone lines may be assigned any of these codes.
History of the 283 area code
283 went into service on April 28, 2023 as an overlay of 513, relieving number exhaustion in the Cincinnati area. Rather than splitting the region, the overlay lets existing customers keep their numbers while new lines draw from the added code. Learn more in our overlay guide.
Is 283 a scam or spam risk?
283 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 283 number on your screen is no guarantee the caller is in Cincinnati, OH or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other Ohio area codes
Explore more
See every code in Ohio, compare codes across the Midwest region, or view all Eastern Time codes. You can also browse the 2XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
283 area code FAQ
Where is the 283 area code?
The 283 area code is in Ohio, covering southwestern Ohio, including Cincinnati, Hamilton and Middletown, in the Midwest region.
What cities are in the 283 area code?
Cities in the 283 area code include Cincinnati, Hamilton, Middletown, Fairfield, West Chester, Mason, Lebanon, Oxford, Norwood and Blue Ash.
What time zone is 283 in?
283 is in the Eastern Time zone.
What is the overlay for the 283 area code?
283 shares its territory with 513. Both codes (283, 513) serve the same area, so 10-digit dialing is required for every call.
When did the 283 area code start?
283 went into service on April 28, 2023 as an overlay of 513.
Do I have to dial 10 digits for 283?
Yes. Because 283 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 283 a toll-free or premium code?
No. 283 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.