Area Code 436
Ohio
Area code 436 serves Ohio, primarily Parma, in the Eastern Time (ET) time zone. It is an overlay area code sharing territory with area code 440.
Overlay Area Code
This area code is part of an overlay region, meaning the same geographic area is served by multiple area codes. Overlay codes were introduced to meet growing demand for phone numbers without requiring existing customers to change their numbers.
This area code shares its geographic region with: area code 440 (Parma).
In service since: 01-Mar-2024
Demographics & Economics
- Total Population
- 1,591,224
- Population Density
- 496 people/sq miabove U.S. average (U.S.: 93 people/sq mi)
- Median Household Income
- $70,693near U.S. median (U.S.: $75,144)
- Poverty Rate
- 12.5%near U.S. average (U.S.: 11.5%)
- Unemployment Rate
- 5.2%above U.S. average (U.S.: 3.6%)
- Education Attainment
- Bachelor's Degree+31.6%near U.S. average (U.S.: 33.7%)High School or Lower33.4%
Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.
See how this area code compares to all US area codes in the Statistics dashboard.
Time Zone
- Eastern Time (ET)
NANPA Relief Status
According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.
Source: NANPA NPA Relief Planning Reports · See all relief planning statuses
Current Time
Prefix Utilization
Geographic Coverage
State
OH
Major Cities
- Parma
- Lorain
- Elyria
- Mentor
- Strongsville
- North Ridgeville
- Westlake
- North Olmsted
- North Royalton
- Avon Lake
- Avon
- Solon
- Willoughby
- Rocky River
- Parma Heights
- Painesville
- Mayfield Heights
- Broadview Heights
- Brook Park
- Berea
- Ashtabula
- Eastlake
- Fairview Park
- Middleburg Heights
and 73 more cities
Historical Timeline of Area Code 436
Area code 436 entered service on March 1, 2024, as an overlay of area code 440 in northeastern Ohio. The code was activated in response to projected exhaustion of available prefixes in the 440 area code. Source: PUCO
Key milestones:
- 1997: Area code 440 was created from a three-way split of area code 216, one of the original 86 North American area codes assigned in 1947. The split served Cleveland's suburban ring while 216 retained the city core. Source: Wikipedia
- 2020: NANPA issued Planning Letter PL-556, mandating 10-digit dialing nationwide for area codes where 988 appeared as a prefix. The Federal Communications Commission enforced this transition by October 24, 2021, which accelerated prefix consumption in the 440 region. Source: Ohio Consumer Counsel
- 2022: The Public Utilities Commission of Ohio opened Case No. 22-631-TP-COI to address 440 exhaustion. NANPA issued Planning Letter PL-610 on February 16, 2023, confirming the new 436 area code assignment. Source: PUCO
- March 1, 2024: Area code 436 went into service as an overlay. New subscribers in the 440 region began receiving 436 numbers. The test routing number for verification is 436-436-1436. Source: Wikipedia.
The overlay model means existing 440 subscribers retain their numbers. Both 440 and 436 numbers coexist in the same geographic area, requiring 10-digit dialing for all local calls. Source: Ohio Consumer Counsel
Regulatory History
Area code 436 resulted from a single regulatory action by the Public Utilities Commission of Ohio, with NANPA managing the technical implementation. Source: PUCO
| Year | Event | Docket | Regulatory Action & Impact |
|---|---|---|---|
| 2020 | 10-digit dialing mandate | PL-556 | NANPA Planning Letter PL-556 mandated 10-digit dialing nationwide for any area code where 988 appeared as a prefix. The deadline was October 24, 2021, reducing available prefix combinations in 440. Source: Ohio Consumer Counsel |
| 2022 | Exhaust proceeding opened | PUCO 22-631-TP-COI | PUCO initiated a proceeding to assign a new area code for the 440 region. NANPA confirmed the 440 area code was projected to exhaust available prefixes within 24 months. Source: PUCO |
| Dec 2022 | PUCO order approved | PUCO 22-631-TP-COI | PUCO approved the overlay on December 14, 2022, selecting an overlay over a split to preserve existing subscriber numbers. The order established 436 as the overlay code. Source: PUCO |
| Feb 2023 | NANPA planning letter issued | PL-610 | NANPA assigned area code 436 as the overlay for 440 via Planning Letter PL-610, dated February 16, 2023. Carriers received notification to update routing tables and provisioning systems. Source: PUCO |
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 436).
| County | Population | Share |
|---|---|---|
| Cuyahoga, OH | 527,800 | 33.2% |
| Lorain, OH | 328,165 | 20.6% |
| Lake, OH | 272,650 | 17.1% |
| Geauga, OH | 225,867 | 14.2% |
| Ashtabula, OH | 137,118 | 8.6% |
| Medina, OH | 31,383 | 2.0% |
| Trumbull, OH | 23,912 | 1.5% |
| Erie, OH | 23,124 | 1.5% |
| Summit, OH | 13,954 | 0.9% |
| Huron, OH | 7,251 | 0.5% |
Area Code 436 Family Tree
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Area code 436 was originally assigned in 01-Mar-2024 to serve OH.
Call Context
This area code covers a geographic region across OH, including Parma and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 436.
Other Area Codes in Ohio
Area codes that also serve Ohio, linked for easy comparison.