US CBP Port Codes

Schedule D port codes are the official numeric identifiers that U.S. Customs and Border Protection assigns to every domestic port of entry. Each code consists of a four-digit number where the first two digits indicate the customs district and the remaining digits identify the specific port within that district. Importers, brokers, and carriers must cite the correct Schedule D code on every customs entry, in-bond movement, and warehouse withdrawal filed with CBP.

Getting the port code wrong can route your entry to the wrong Center of Excellence and Expertise, delay cargo release, or trigger penalties. The district-port hierarchy also determines which FIRMS facilities (container freight stations, bonded warehouses, and Foreign Trade Zones) are available for examination and storage. When planning an import, always verify the Schedule D code against the port where goods will physically arrive and be presented to CBP.