The information below is taken directly from the Norwegian Customs website

Opening hours
​Always open, but please note that our service is limited outside ordinary office hours (Monday to Friday between 08.00 and 15.30). Please read more in the section «Tasks».

Office address
​Passenger terminal, Oslo Airport Gardermoen, ground floor (arrivals); right next to international arrivals.

Telephone
​+47 22 86 03 12