Area Code 610
Pennsylvania
Area code 610 serves Pennsylvania, primarily Allentown, in the Eastern Time (ET) time zone. It has served the region since 08-Jan-1994.
Overlay Area Codes
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 484 (Allentown), area code 835 (Allentown).
In service since: 08-Jan-1994
Demographics
The estimated population served by area code 610 is approximately 3,513,836. The population density is 897 people per square mile, which is higher than the national average of 94. The median household income is $88,576, which is higher than the national median of $78,538. Approximately 41.3% of adults hold a bachelor's degree or higher, compared to the national rate of 35.0%. This rate is higher than the national average. The poverty rate stands at 9.1%, which is lower than the national rate of 12.4%.
History
Area code 610 was established in 1994 as a geographic area code. It shares its territory with area codes area code 484 and area code 835.
Demographics & Economics
- Total Population
- 3,513,836
- Population Density
- 897 people/sq miabove U.S. average (U.S.: 94 people/sq mi)
- Median Household Income
- $88,576above U.S. median (U.S.: $78,538)
- Poverty Rate
- 9.1%below U.S. average (U.S.: 12.4%)
- Unemployment Rate
- 5.2%near U.S. average (U.S.: 5.2%)
- Education Attainment
- Bachelor's Degree+41.3%above U.S. average (U.S.: 35.0%)High School or Lower31.1%
Statistics are population-weighted aggregations from Census ACS 5-year estimates.See Sources for details.
Geographic Coverage
State
PA
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
Time Zone
- Eastern Time (ET)
Current Time
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 610).
| 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% |
Call Context
This area code covers a geographic region across PA, including Allentown and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 610.
Other Area Codes in Pennsylvania
Area codes that also serve Pennsylvania, linked for easy comparison.
Frequently Asked Questions
Common questions about area code 610 and how phone numbering works.
Phone numbers assigned to area code 610 are tied to where they were originally provisioned — not the caller's current location. This code serving roughly 3514k people covers Allentown in PA, so a number originally set up there will retain the 610 prefix even if the owner moves or uses VoIP. Mobile phones keep their original number when users relocate, and businesses often adopt local area codes to establish a regional presence.
Start by looking up the area code on this site to understand its geographic context — area code 610 is associated with Allentown in PA. For caller-specific details, use your carrier's caller ID features or check public directories. If you suspect fraud, you can report it to the FTC. To file a complaint about robocalls or spoofed numbers, visit the FCC Consumer Complaint Center. You can also register with the National Do Not Call Registry.
When an area's available number pool runs low, regulators introduce an "overlay" code covering the same territory. Both codes coexist, and new numbers are assigned from whichever has availability. Area code 610 serves the Allentown region in PA, where growing demand for phone numbers necessitated an additional code. This area code shares its region with area code 484, area code 835. Learn more in our overlay vs split guide.