Pasadena, CA

ZIP code 91109 is located in Pasadena, California, and is primarily known for being the location of the renowned California Institute of Technology (Caltech). This area is also home to the Jet Propulsion Laboratory (JPL), a NASA center responsible for robotic exploration of our solar system. Additionally, the ZIP code includes the Pasadena City College, making it a hub for science, technology, and education in the region.