Here are the main digital out‑of‑home (DOOH) networks, owners and programmatic platforms active in Belgium — grouped by type with a one‑line note and a source you can check.

Major national operators / street & transit

• Clear Channel Belgium (large national Adshel/street, station and billboard digital inventory; programmatic via LaunchPAD). (clearchannel.be)
• JCDecaux Belgium (street furniture, stations, airports, shopping centers — extensive digital network and programmatic availability via VIOOH). (jcdecaux.com)
• Bauer Media Outdoor (large portfolio of digital screens across streets, stations and roadside; publishes Belgian DOOH research). (bauermediaoutdoor.com)

Premium large-format / landmark digital

• blowUP media (Ströer) — premium large-format LED and Frontline full‑motion city‑centre screens in Antwerp, Brussels, Ghent, Knokke, Leuven, etc. (blowup-media.be)

Cinema & venue networks

• Kinepolis / Brightfish (cinema screen advertising across Kinepolis cinemas; in‑theatre digital inventory). (corporate.kinepolis.com)

Retail, gym & in‑store networks

• Roularta (in‑store / “Mijn Stad TV” and other retail digital placements via the Roularta group). (roularta.be)
• Basic-Fit Digital (gym screen network; used in aggregator/partnerships). (glooh.co)

Programmatic platforms & aggregators (market access)

• Displayce (programmatic DOOH platform with office in Brussels; connects buyers to many Belgian screens). (displayce.com)
• VIOOH (premium DOOH SSP/exchange used by JCDecaux and others in Belgium). (blog.viooh.com)
• Glooh (self‑service DOOH aggregator offering access to multiple Belgian networks, including Clear Channel and JCDecaux inventory). (glooh.co)

Notes and how to use this list

• Clear Channel and JCDecaux are the two largest national DOOH owners; premium large-format (blowUP) and cinema (Kinepolis) handle landmark and venue inventory; programmatic platforms (Displayce, VIOOH, Glooh) let you buy across multiple owners. (clearchannel.be)
• The Belgian DOOH market is growing and increasingly programmatic — industry reports (UMA/BMO) show digital formats now represent a large and growing share of OOH spend. (uma.be)

If you want, I can:

• produce a downloadable spreadsheet with these networks and their Belgian contact/sales pages, or
• show programmatic inventory counts (screens/impressions) per operator where available. Which would you prefer?