About Area Code 610
- Region Code
- 610
- City
- Allentown
- State
- Pennsylvania
- Population
- 5,399,237
- Largest City
- Allentown
- Neighboring Codes
- Time Zone
- Eastern Time
Pennsylvania
(610) Area Code 610 — Allentown, Pennsylvania
610 Area Code – Allentown, Pennsylvania: Location, Time Zone & History
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Map of Area Code 610
Available Phone Numbers
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History & Cultural Notes
Area code 610 serves a diverse economic corridor across eastern Pennsylvania, from the Lehigh Valley cities of Allentown, Bethlehem, and Easton down through Reading and the western and northern suburbs of Philadelphia. Formed on January 8, 1994 by splitting off the western and northern portion of area code 215, it was Pennsylvania's first new area code since the North American Numbering Plan began in 1947.
The region's economy leans on healthcare and hospital networks, along with manufacturing spanning medical devices, pharmaceuticals, food production, and metal fabrication. Warehousing and intermodal logistics have expanded significantly here, making the corridor a hub for e-commerce distribution, and pharmaceutical manufacturing investment has grown as well, including a large campus in Upper Macungie Township. Cities such as West Chester, Norristown, and Chester round out the territory beyond the Lehigh Valley and Reading.
- Healthcare and hospital networks
- Manufacturing: medical devices, pharmaceuticals, food, and metal fabrication
- Logistics, warehousing, and intermodal transport
- Life sciences and pharmaceutical production
Demand for numbers led to the 484 overlay in 1999 and later 835 in 2022, completing a three-way overlay that lacks the strong single-code identity of neighboring Philadelphia's 215 and instead ties the region to Lehigh Valley regional identity.