Zip Code 94588 - Pleasanton is a city in alameda county, california, united states. Portions of 94588 are also in dublin and hayward and livermore. Look up a zip code. Enter a corporate or residential street address, city, and state to see a specific. Web zip code 94588 is located in the city of pleasanton, california and covers 32.74 square miles of land area. Zip code 94588 is located in pleasanton california. Web look up a zip code ™. / 37.66250°n 121.87472°w / 37.66250;
Zip code 94588 is located in pleasanton california. Look up a zip code. Pleasanton is a city in alameda county, california, united states. Portions of 94588 are also in dublin and hayward and livermore. / 37.66250°n 121.87472°w / 37.66250; Web look up a zip code ™. Web zip code 94588 is located in the city of pleasanton, california and covers 32.74 square miles of land area. Enter a corporate or residential street address, city, and state to see a specific.