Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — AREA-CODE/283

283 area code

Area code 283 is in Ohio. It covers Cincinnati, Hamilton, Middletown and 115 other places: 115 ZIP codes in Hamilton, Butler, Clermont and 2 other counties. Local time there is , Eastern Time. In service since 2023 as an overlay: it covers the same area as 513, so a number from there can have either code.

State
Ohio
Time zone
Eastern
Largest city
Cincinnati
Overlays
513
In service since
2023
Rate centres
22
Prefixes assigned
48 (480,000 numbers)

Who calls from a 283 number

NANPA records the carrier each block of 283 numbers is assigned to. Of the 377,000 283 numbers assigned, 57% are with cable, internet-calling, business and other carriers (Onvoy and Commio); 43% with mobile carriers (AT&T Mobility, T-Mobile and Boost Mobile).

That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.

Carriers holding the most 283 numbers
CarrierKindShare
OnvoyCable, VoIP, other34%
AT&T MobilityMobile25%
T-MobileMobile7%
Boost MobileMobile6%
Verizon WirelessMobile4%
CommioCable, VoIP, other3%

An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.

Places in area code 283

The 18 places with a telephone rate centre of their own using 283, largest first. Each links to its ZIP codes.

Places in area code 283
PlaceZIP codesPopulation
Cincinnati, OH 71 311,224
Hamilton, OH 4 63,468
Middletown, OH 2 51,617
Mason, OH 1 35,509
Oxford, OH 1 21,753
Lebanon, OH 1 21,501
Trenton, OH 1 13,583
Harrison, OH 1 13,084
South Lebanon, OH 1 6,712
Waynesville, OH 1 2,777
Bethel, OH 1 2,658
Williamsburg, OH 1 2,608
Morrow, OH 1 2,523
Newtonsville, OH 1 787
Seven Mile, OH 1 463
Fayetteville, OH 1 324
Butlerville, OH — 178
Shandon, OH 1 —

Nearby places using 283

These places have no rate centre of their own in NANPA's records; the nearest one uses 283. Near an area-code boundary that can be wrong for part of a town.

ZIP codes in area code 283

115 ZIP codes in 41 towns, by the town each is mailed to, largest first. Each links to its own page.

Where 283 numbers are issued

NANPA's rate centres with the most 283 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.

Rate centres using area code 283
Rate centrePlacePrefixes
CINCINNATI Cincinnati 14
HAMILTON Hamilton 6
CLERMONT — 3
LTL MIAMI — 3
LEBANON Lebanon 2
MASON Mason 2

Counties

The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.

Which code covers where you are now? What area code am I in? answers from your location.

Questions about area code 283

Where is area code 283?

Area code 283 is in Ohio. It covers Cincinnati, Hamilton, Middletown and 115 other places: 115 ZIP codes in Hamilton, Butler, Clermont and 2 other counties.

What ZIP codes are in area code 283?

115 ZIP codes, by the town each is mailed to: Cincinnati (71, 45201 to 45999), Hamilton (4, 45011 to 45015), Middletown (2, 45042 to 45044), Mason (45040) and 37 more towns. The full list is on this page.

What time zone is area code 283 in?

Eastern time.

Is a 283 number a mobile or a landline?

It can be either. 43% of 283 numbers are assigned to mobile carriers and 0% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.

What area codes overlay 283?

513. They cover the same area as 283, so a new number there can be given any of them.

Does a 283 number mean the caller is in Ohio?

Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 283 call can come from anywhere.

Other area codes in Ohio

All 15 Ohio area codes, by area, with the cities each covers

Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.

Cite this page

zipcodes.pro. “Area code 283.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/283

Underlying data is public domain or openly licensed — sources, vintages and licences.