New York · Eastern Time
315 Area Code
Area code 315 is in New York, serving central and northern New York, including Syracuse, Utica, Watertown and the North Country. It is in the Eastern Time zone. It shares its territory with overlay code 680, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 315 area code?
315 is a New York area code covering central and northern New York, including Syracuse, Utica, Watertown and the North Country. In the wider directory it sits in the Northeast region.
Cities in the 315 area code
- Syracuse
- Utica
- Rome
- Watertown
- Auburn
- Oswego
- Geneva
- Fulton
- Oneida
- Ogdensburg
- Massena
- Potsdam
- Seneca Falls
- Newark
Counties served by 315
Onondaga County, Oneida County, Jefferson County, Oswego County, Cayuga County, St. Lawrence County, Madison County, Herkimer County, Wayne County and Seneca County.
315 overlay codes and dialing
The 315 territory is covered by an overlay of 2 area codes: 315, 680. All of them serve the same geographic area, and the original code is 315. 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 315 area code
315 is one of the original area codes assigned in 1947, when AT&T and Bell Laboratories created the North American Numbering Plan and divided the country into the first 86 numbering plan areas. It has served the Syracuse area ever since, with 680 later added as an overlay to supply more numbers.
Is 315 a scam or spam risk?
315 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 315 number on your screen is no guarantee the caller is in Syracuse, NY or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other New York area codes
Explore more
See every code in New York, compare codes across the Northeast region, or view all Eastern Time codes. You can also browse the 3XX 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
315 area code FAQ
Where is the 315 area code?
The 315 area code is in New York, covering central and northern New York, including Syracuse, Utica, Watertown and the North Country, in the Northeast region.
What cities are in the 315 area code?
Cities in the 315 area code include Syracuse, Utica, Rome, Watertown, Auburn, Oswego, Geneva, Fulton, Oneida and Ogdensburg.
What time zone is 315 in?
315 is in the Eastern Time zone.
What is the overlay for the 315 area code?
315 shares its territory with 680. Both codes (315, 680) serve the same area, so 10-digit dialing is required for every call.
When did the 315 area code start?
315 went into service on January 1, 1947 as one of the original 1947 North American area codes.
Do I have to dial 10 digits for 315?
Yes. Because 315 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 315 a toll-free or premium code?
No. 315 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.