If you have any questions about our Services or Portbase, please do not hesitate to contact us. Customers can always contact our Service Desk.

Service Desk

For support using our services.

Marketing & Sales

For information about our services or for complaints.

Software suppliers

Further information for software suppliers.


For questions about invoices.

General information

Blaak 16
3011 TA Rotterdam

Telephone: +31 (0)88 – 625 25 00


The entrance to the parking garage is located at the Wijnstraat (back of our office building). The easiest way is to enter the Zwartehondstraat when you come from the Blaak and then take the first street on the left (Wijnstraat). After 50 meters you will see the entrance to the parking garage on your left.

From the parking garage you can reach the central hall through the first parking floor. You can register at the reception in this central hall. If the parking garage is full, you can park (paid) in the parking garage ‘the Markthal’. Determine your route here.

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