Post Offices in North Charleston, South Carolina, United States SearchSearch SearchSearch View: Grid 1View: Grid 2View: Grid 3View: Grid 4View: Grid 5View: List Cross County Post Office No Reviews Favorite Fax: (843) 760-5342Phone: (843) 760-5330Retail Hours North Charleston Post Office No Reviews Favorite Fax: (843) 553-0847Phone: (803) 926-6354Retail Hours Pinehaven Post Office No Reviews Favorite Fax: (803) 744-1607Phone: (803) 926-6354Retail Hours