International maritime shipping and trade operations in Cambodia are centered around a few primary designated port facilities, each identified by specific UN/LOCODE port identifiers. The country's principal deep-water seaport is the Port of Sihanoukville, designated by the port code KHPNH or KOS, which handles the vast majority of containerized import and export cargo. Additionally, the river port facilities operating in the capital city of Phnom Penh are designated under the port code PNH, managing regional freight traffic along the Mekong River network.