Area codes in Middletown, Ohio
Middletown, Ohio uses 2 area codes — 513 and 283. The main Middletown area code is 513.
Area codes serving Middletown
Phone numbers in Middletown are written as ten digits — for example (513) 555-0190 — and fall in the Eastern Time zone.
How Middletown came to have 2 area codes
The original Middletown area code is 513, in service since 1947. As the area ran low on available numbers, an overlay code was added over the same region for new phone lines: 283 (2023). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Middletown now uses all 2 codes and every local call is dialed with ten digits.
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Frequently asked questions
What is the area code for Middletown?
The main area code for Middletown, Ohio is 513. Middletown is now served by 2 area codes in total: 513, 283.
How many area codes does Middletown have?
Middletown has 2 area codes: 513, 283.
Why does Middletown have more than one area code?
As Middletown used up the numbers available in its original area code (513, in service since 1947), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Middletown number?
Dial all 10 digits — the area code (513 or 283) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.