Post Offices in Northern Mariana Islands, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Rota Post Office No Reviews Favorite Fax: (670) 532-3160Phone: (670) 532-9401Retail Hours Saipan Post Office No Reviews Favorite Fax: (670) 235-1039Phone: (670) 234-6270Retail Hours