Area Code 484

Pennsylvania

Area code 484 serves Pennsylvania, primarily Allentown, in the Eastern Time (ET) time zone. It is an overlay area code sharing territory with area code 610.

Published: February 17, 2026Verified against NANPA and FCC records

Overlay Area Code

This area code shares its geographic footprint with an overlay code, so the same cities are served by two area codes. Because overlays leave existing numbers untouched, this region's relief planning favors adding codes over redrawing boundaries.

The codes serving this same region: area code 835 (Allentown).

With prefix utilization already at 98.3%, numbering resources here are under sustained pressure — context that explains why overlays were introduced.

In service since: 05-Jun-1999

Learn more about overlay and split area codes →

Demographics & Economics

Total Population: 2,939,404
Population Density: 2,447 people/sq mi
above U.S. average (U.S.: 95 people/sq mi)
Median Household Income: $61,953
below U.S. median (U.S.: $80,734)
Poverty Rate: 14.5%
above U.S. average (U.S.: 12.5%)
Unemployment Rate: 6.5%
above U.S. average (U.S.: 5.2%)
Education Attainment: Bachelor's Degree+
41.0%
above U.S. average (U.S.: 35.7%)
High School or Lower
31.3%

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 income ranking and density ranking.

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

Eastern Time (ET)

Prefix Utilization

Geographic Coverage

State

Major Cities

Allentown
Reading
Bethlehem
Norristown
Chester
Drexel Hill
Easton
King of Prussia
Pottstown
West Chester
Phoenixville
Fullerton
Ardmore
Coatesville
Yeadon
Emmaus
Wyomissing
Lansdowne
Broomall
Darby
Northampton
Woodlyn
Bala Cynwyd
Middletown

and 249 more cities

Area Code 484 geographic coverage map (light mode)

Demographics

The estimated population served by area code 484 is approximately 2,939,404. The population density is 2,447 people per square mile, which is higher than the national average of 95. The median household income is $61,953, which is lower than the national median of $80,734. Approximately 41.0% of adults hold a bachelor's degree or higher, compared to the national rate of 35.7%. This rate is higher than the national average. The poverty rate stands at 14.5%, which is higher than the national rate of 12.5%.

History

Area code 484 serves as an overlay for the same territory as area code 610. It was introduced in 1999 to provide additional phone number capacity for the region. It shares its territory with area codes area code 610 and area code 835.

County Coverage

Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 484).

County	Population	Share
Delaware, PA	704,116	20.0%
Chester, PA	624,760	17.8%
Montgomery, PA	570,251	16.2%
Berks, PA	541,658	15.4%
Lehigh, PA	484,196	13.8%
Northampton, PA	365,559	10.4%
Bucks, PA	82,166	2.3%
Lancaster, PA	62,510	1.8%
Carbon, PA	40,938	1.2%
Monroe, PA	33,104	0.9%
Lebanon, PA	4,578	0.1%

Area Code 484 Family Tree

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Total Codes

Splits

Overlays

Max Depth

All Descendants

Code ▲	State	Type	In Service	Parent
835	PA	overlay	02-Sep-2022	484

Area code 484 was originally assigned in 05-Jun-1999 to serve PA. Over the years, it has generated 1 descendant area code through a combination of geographic splits and overlays as demand for telephone numbers grew.