Post Offices in Rehoboth Beach, Delaware, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Rehoboth Beach Post Office No Reviews Favorite Fax: (302) 227-3370Phone: (302) 227-8406Retail Hours Rehoboth Beach Carrier Annex Post Office No Reviews Favorite Fax: (302) 227-8246Phone: (302) 227-8241Retail Hours