In Belgium there are 4 different GfK companies.
You can select the GfK company of your choice below.

Division Brussels GfK Panel Services Benelux B.V. Buro & Design Center Heizel Esplanade Heysel PB 36 B-1020 Brussels +32 (0)2 558 0558	Divison Leuven Arnould Nobelstraat 42 3000 Leuven GfK Retail and Technology Benelux +32 (0)2 474 39 50 GfK Significant +32 (0)16 74 24 24 GfK Audimetrie +32 (0)16 74 29 59