Area codes in Delaware, Ohio
Delaware, Ohio uses 2 area codes — 740 and 220. The main Delaware area code is 740.
Area codes serving Delaware
Phone numbers in Delaware are written as ten digits — for example (740) 555-0190 — and fall in the Eastern Time zone.
How Delaware came to have 2 area codes
The original Delaware area code is 740, in service since 1997. As the area ran low on available numbers, an overlay code was added over the same region for new phone lines: 220 (2015). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Delaware now uses all 2 codes and every local call is dialed with ten digits.
All Ohio area codes · Is a Delaware call a scam?
Nearby cities
- Columbus area codes
- Marion area codes
- Ashland area codes
- Findlay area codes
- Lima area codes
- Dayton area codes
- Sandusky area codes
- Athens area codes
More cities in Ohio
- Cincinnati area codes
- Cleveland area codes
- Toledo area codes
- Akron area codes
- Youngstown area codes
- Oxford area codes
- Brunswick area codes
- Hudson area codes
Frequently asked questions
What is the area code for Delaware?
The main area code for Delaware, Ohio is 740. Delaware is now served by 2 area codes in total: 740, 220.
How many area codes does Delaware have?
Delaware has 2 area codes: 740, 220.
Why does Delaware have more than one area code?
As Delaware used up the numbers available in its original area code (740, in service since 1997), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Delaware number?
Dial all 10 digits — the area code (740 or 220) 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.