U.S. Customs and Border Protection Website: U.S. Customs and Border Protection. Contact: Contact Customs and Border Protection. ... Local Offices: Ports of Entry—Air, Land, and Sea. Main Address: 1300 Pennsylvania Ave., NW. ... Phone Number: 1-202-325-8000. Toll Free: 1-877-CBP-5511 (1-877-227-5511) TTY: 1-866-880-6582. Forms: More items...