Below is a list of Callao MO zip codes. For your research we have also included Callao Area Code, Time Zone, UTC and the local Macon County FIPS Code. Each Callao Missouri zip code has a center Longitude / Latitude point (the Callao center is -92.623001098633 / 39.761798858643). For your convenience we have also indicated if that zip code in Callao observes Daylight Savings time.