Area Code 440
Ohio
Area code 440 serves Ohio, primarily Parma, in the Eastern Time (ET) time zone. It has served the region since 16-Aug-1997.
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 436 (Parma).
In service since: 16-Aug-1997
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 440
On August 16, 1997, the North American Numbering Plan Administrator split area code 216 to create area code 440, assigning the suburban ring around Cleveland while 216 retained the city core. Source: Wikipedia — Area codes 440 and 436
Key milestones:
- August 16, 1997: Area code 440 went into service as a split of area code 216, one of the original 86 North American area codes assigned in 1997. The new code covered Lake, Geauga, Ashtabula, and Lorain counties, along with portions of Erie, Huron, Trumbull, and Cuyahoga counties. Source: Wikipedia — Area codes 440 and 436
- October 24, 2021: Mandatory 10-digit dialing took effect for area codes where 988 appeared as a possible prefix. NANPA Planning Letter PL-556 mandated the transition, reducing the total prefix combinations available in the 440 region. Source: Ohio Consumer Counsel
- December 14, 2022: PUCO approved Case No. 22-631-TP-COI, opening a proceeding to address projected exhaustion of 440 prefixes. NANPA confirmed the overlay was needed within 24 months. Source: PUCO
- February 16, 2023: NANPA issued Planning Letter PL-610, assigning area code 436 as an overlay of 440. The test routing number was set to 436-436-1436 for carrier verification. Source: Wikipedia — Area codes 440 and 436
- March 1, 2024: Area code 436 went into service as an overlay. Existing 440 subscribers retained their numbers, and new subscribers began receiving 436 numbers. Source: PUCO.
The transition from a single area code to an overlay model allowed northeastern Ohio to accommodate continued population growth and device proliferation without requiring existing subscribers to change their numbers.
Regulatory History
Area code 440 has undergone five significant regulatory events over its 29-year history. The Public Utilities Commission of Ohio manages area code administration for the state, with NANPA handling the technical implementation of splits and overlays. Source: PUCO
| Year | Event | Docket | Regulatory Action & Impact |
|---|---|---|---|
| 1997 | Split from 216 | NANPA Order | NANPA split 216 into 216, 330, and 440 to relieve prefix exhaustion; 440 assigned to Cleveland suburban ring covering eight counties. Source: Wikipedia — Area codes 440 and 436 |
| 2020 | 10-digit dialing mandate | PL-556 | PL-556 required 10-digit dialing in areas where 988 conflicts with existing prefixes; deadline October 24, 2021. Source: Ohio Consumer Counsel |
| 2022 | Overlay proceeding opened | PUCO 22-631-TP-COI | Case No. 22-631-TP-COI opened; NANPA projected 440 exhaustion within 24 months. Source: PUCO |
| Feb 2023 | Overlay code assigned | PL-610 | PL-610 assigned 436 as overlay; test number 436-436-1436 configured for carrier testing. Source: Wikipedia — Area codes 440 and 436 |
| Mar 2024 | 436 overlay activated | PUCO Order | 436 activated; existing 440 subscribers retained numbers; new assignments use 436 selectively. Source: PUCO |
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 440).
| 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 440 Family Tree
Hover over nodes to see details. Click to navigate to individual area code pages. Use scroll to zoom, drag to pan.
Area code 440 was originally assigned in 16-Aug-1997 to serve OH. Over the years, it has generated 1 descendant area code through a combination of geographic splits and overlays as demand for telephone numbers grew.
Call Context
This area code covers a metropolitan region in OH with moderate to high population density, centered on Parma and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 440.
Other Area Codes in Ohio
Area codes that also serve Ohio, linked for easy comparison.