436 area code — Ohio geographic
Phone numbers beginning 436 are registered in Ohio (Eastern time zone). The code entered service on March 1, 2024. It is part of the 436/440 overlay complex — these codes share the same territory. Note that porting and VoIP mean a 436 number can be used from anywhere — the code marks where the number was assigned.
436 was created from 440 in 2024.
Practical takeaway: the 436 label narrows geography to Ohio, the prefix narrows it to a locality, and neither authenticates a caller. Verification means calling back through a number you found yourself.
NANPA projects numbering capacity for the 436/440 complex to exhaust in 2Q 2120.
Dialing: 10D locally, 10D to other codes (1+10 digit dialing permissible at service providers discretion excluding cmrs providers).
FAQ
Where is a 436 number from?
436 is assigned to Ohio in the Eastern time zone. The three digits after the area code (the prefix) narrow it down to a rate center.
Is 436 a toll-free number?
No. 436 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.
Why do 440 and 436 cover the same place?
They are overlays: when a code runs low on numbers, a new code is added over the same territory instead of splitting it. The 436/440 complex shares one service area, and local calls are dialed with 10 digits.