River cruise contact information Quickly find the correct contact details: River Cruise Reservations & Planning 1. Call the number +31 (0)20 5234600 2. Press 1 and 4 Accessible: Mon-Fri 09:00-17:00 Or send us an email: firstname.lastname@example.org Harbour Master’s Division team View marine radiotelephony channels View telephone number and extension numbers. For reporting your arrival and departure, operational reports, assistance with permit and exemption applications, hazardous substances, mooring facilities, etc. Harbour Dues Team View contact options For assistance with invoices, payments, direct debit, login/account questions, etc. Portbase For more information about Portbase, the shared Port Community System for the Ports of Amsterdam and Rotterdam, please visit www.portbase.com. Complaints If you have any complaints for or about the Harbour Master Division, please phone the Port of Amsterdam Complaint Line at +31 20 5234666 or use the Online Complaint Form.