The area code 640 is located in Allentown, New Jersey.
An area code that's got Allentown, New Jersey covered is 640. Nestled in the heart of Allentown, this area code serves as the telephonic gateway to this charming town. Whether you're a resident or just passing through, area code 640 connects you to a bustling community teeming with history, culture, and natural beauty. From the historic main street to the picturesque farmlands, Allentown is a slice of small-town life that's worth exploring. So, dial up area code 640 and discover all that Allentown, New Jersey has to offer!