Home/PostalMag/Post Office Photos/Earp, California Post Office 92242 Post Office Photos Earp, California Post Office 92242 PostalMag · Sunday, March 27, 2022 The Earp, California Post Office serves ZIP Code 92242. Photo by Tom Lewis. Earp Post Office 144977 Aqueduct Rd Earp, CA 92242 Location at Google Maps