Allentown, Pennsylvania

Where Is Area Code 610?

Area code 610 is in southeastern Pennsylvania. It serves the Lehigh Valley, Delaware Valley suburbs, and nearby parts of eastern Pennsylvania. Allentown is one of the best-known cities in the 610 area.

Area code 610 covers communities such as Allentown, Bethlehem, Reading, West Chester, Norristown, Chester, and Media. It serves parts or all of counties including Lehigh County, Northampton County, Berks County, Delaware County, and Chester County. It also covers parts of Montgomery County.

The region includes the Lehigh River and the Schuylkill River. It is also home to major places such as Lehigh University in Bethlehem and Valley Forge National Historical Park near King of Prussia. Much of the 610 area sits west and north of Philadelphia.

History of Area Code 610

Area code 610 began on January 8, 1994. The North American Numbering Plan created it in a split from area code 215, which had long served Philadelphia and many nearby suburbs. The split reflected strong phone service growth in the Philadelphia suburbs, the Lehigh Valley, and Reading area.

Area code 484 was added as an overlay to 610 in 1999. Area code 835 was later added as a second overlay in 2022. Because of these overlays, the same geographic region can use 610, 484, or 835, and 10-digit dialing applies across the area.

Key Facts About Area Code 610

• Area code 610 is a Pennsylvania geographic area code that serves Allentown and a large part of southeastern Pennsylvania.
• Area code 610 is in the Eastern Time Zone.
• Area code 610 was created on January 8, 1994, in a split from area code 215.
• Area code 484 overlays the 610 region and was introduced in 1999.
• Area code 835 also overlays the 610 and 484 region, and it entered service in 2022.
• Major cities in the 610 area include Allentown, Bethlehem, Reading, West Chester, Norristown, Chester, and Media.
• The 610 region includes well-known institutions and landmarks such as Lehigh University, Villanova University, and Valley Forge National Historical Park.
• The 610 area serves part of one of Pennsylvania’s largest population corridors, but a single official population figure for the area code itself is not fixed because area code boundaries do not match city or county borders.

Frequently Asked Questions

What state is area code 610 in?

Area code 610 is in Pennsylvania.

What major cities use area code 610?

Major cities and communities that use area code 610 include Allentown, Bethlehem, Reading, West Chester, Norristown, Chester, and Media.

Is area code 610 a toll-free number?

No. Area code 610 is a geographic area code for southeastern Pennsylvania.