Post Offices in Vacaville, California, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Cernon Post Office No Reviews Favorite Phone: (707) 451-6563Retail Hours Vacaville Post Office No Reviews Favorite Fax: (707) 451-6535Phone: (707) 451-6561Retail Hours