Area Code 220 – Ohio
The phone area code for Ohio is 220 (international format +1220). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 220
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Ohio
Overview of Area Code 220
Area code 220 is a geographic North American Numbering Plan (NANP) code serving the state of Ohio, United States. It is an overlay code for the western and central portions of the state, specifically covering the Columbus metropolitan area and surrounding regions. This code was introduced to supplement the existing 614 area code, which was nearing exhaustion due to high demand for telephone numbers.
Geographic Coverage and Jurisdiction
The 220 area code overlays the same geographic territory as 614, which includes Columbus, the state capital, and its contiguous counties: Franklin, Delaware, Fairfield, Licking, Madison, Pickaway, and Union. This region is a major economic and administrative hub, home to Ohio State University, numerous corporate headquarters, and a thriving technology sector. The overlay does not require a change in local dialing habits for calls within the region: all local calls must be dialed using the ten-digit number (area code + seven-digit number).
Dialing Formats and Instructions
- Local calls (within 220/614): Dial the full ten-digit number, e.g., 220-555-0123 or 614-555-0123.
- Domestic long-distance calls (from other U.S. area codes): Dial 1-220-555-0123.
- International calls (from outside the U.S.): Dial your country's exit code, then 1-220-555-0123.
For callers within the United States, the trunk prefix '1' is used before the area code for all calls outside the local calling area. For international callers, the U.S. country code is +1, so the full international format is +1 220 555 0123.
Overlay and Numbering Considerations
Because 220 is an overlay, it does not change the geographic boundaries of the existing 614 area code. All existing 614 numbers retain their original area code, while new numbers may be assigned either 614 or 220. This ensures that customers can keep their numbers when switching service providers within the region (number portability). The overlay also means that ten-digit dialing is mandatory for all local calls, a practice that has been in effect since the overlay's introduction in 2014.
Practical Implications for Businesses and Residents
For businesses, having a 220 number can be advantageous as it signals a local presence in the Columbus area. It is essential to update marketing materials and stationery to include the full ten-digit number. For residents, the overlay does not affect the cost of calls; calls within the overlay area are considered local. However, it is crucial to ensure that all stored contacts and automated systems are updated to include the area code.