Ohio · Eastern Time
436 Area Code
Area code 436 is in Ohio, serving northeastern Ohio suburbs ringing Cleveland, plus Lorain, Lake, Geauga and Ashtabula counties. It is in the Eastern Time zone. It shares its territory with overlay code 440, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 436 area code?
436 is a Ohio area code covering northeastern Ohio suburbs ringing Cleveland, plus Lorain, Lake, Geauga and Ashtabula counties. In the wider directory it sits in the Midwest region.
Cities in the 436 area code
- Parma
- Lorain
- Elyria
- Mentor
- Strongsville
- Westlake
- North Olmsted
- North Royalton
- Solon
- Avon Lake
- Berea
- Willoughby
- Painesville
- Ashtabula
Counties served by 436
Cuyahoga County, Lorain County, Lake County, Geauga County and Ashtabula County.
436 overlay codes and dialing
The 436 territory is covered by an overlay of 2 area codes: 436, 440. All of them serve the same geographic area, and the original code is 440. 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 436 area code
436 went into service on March 1, 2024 as an overlay of 440, relieving number exhaustion in the Cleveland area. Rather than splitting the region, the overlay lets existing customers keep their numbers while new lines draw from the added code. Learn more in our overlay guide.
Is 436 a scam or spam risk?
436 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 436 number on your screen is no guarantee the caller is in Cleveland, OH or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other Ohio area codes
Explore more
See every code in Ohio, compare codes across the Midwest region, or view all Eastern Time codes. You can also browse the 4XX 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
436 area code FAQ
Where is the 436 area code?
The 436 area code is in Ohio, covering northeastern Ohio suburbs ringing Cleveland, plus Lorain, Lake, Geauga and Ashtabula counties, in the Midwest region.
What cities are in the 436 area code?
Cities in the 436 area code include Parma, Lorain, Elyria, Mentor, Strongsville, Westlake, North Olmsted, North Royalton, Solon and Avon Lake.
What time zone is 436 in?
436 is in the Eastern Time zone.
What is the overlay for the 436 area code?
436 shares its territory with 440. Both codes (436, 440) serve the same area, so 10-digit dialing is required for every call.
When did the 436 area code start?
436 went into service on March 1, 2024 as an overlay of 440.
Do I have to dial 10 digits for 436?
Yes. Because 436 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 436 a toll-free or premium code?
No. 436 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.