Den Haag and Brussels
To my best knwoledge Den Haag zoo opened: 1863 / closed: 1943 and Jardin Zoologique Brussels opened 1851 / closed 1879.
The zoo of The Hague closed down just after the war. About Brussels, I have been looking on the web but can't find anything fast. I remember that it had a similar history as The Hague (closed down very early on because of "mismanagement").
Utrecht never had a zoo.
To my best knwoledge Den Haag zoo opened: 1863 / closed: 1943 and Jardin Zoologique Brussels opened 1851 / closed 1879.