Outline of the country "the Netherlands" with on overview of some airports. It shows large international airports and some regional and small airports and/or landingstrips.
EH - Netherland
EHAM (AMS) – Amsterdam Airport Schiphol – Haarlemmermeer, near Amsterdam
EHBD – Budel Airport – Weert
EHDB – KNMI – De Bilt
EHBK (MST) – Maastricht Aachen Airport – Maastricht
EHDL – Deelen Airbase – Deelen
EHDP – De Peel Airport – Venraij
EHDR – Drachten Airfield – Drachten
EHEH (EIN) – Eindhoven Airport – Eindhoven
EHGG (GRQ) – Groningen Airport Eelde – Eelde
EHGR (GLZ) – Gilze-Rijen Airbase – Gilze and Rijen
EHHO – Hoogeveen Airfield – Hoogeveen
EHHV – Hilversum Airport – Hilversum
EHKD (DHR) – De Kooy – De Kooy
EHVK (UDE) – Volkel Airbase – Uden
EHLE (LEY) – Lelystad Airport – Lelystad
EHLW (LHW) – Leeuwarden Air Base – Leeuwarden
EHMC – Air Operations Control Station Nieuw-Milligen – Nieuw-Milligen
EHMZ – Midden-Zeeland – Middelburg, Zeeland
EHOW – Oostwold Airport – Scheemda
EHRD (RTM) – Rotterdam The Hague Airport – Rotterdam
EHSB (SSB) – Soesterberg Air Base – Soesterberg
EHSE – Seppe Airport – Hoeven
EHST – Stadskanaal Airfield – Stadskanaal
EHTE – Teuge International Airport – Deventer
EHTL – Terlet Airfield – Terlet
EHTW (ENS) – Enschede Airport Twente – Enschede
EHTX – Texel International Airport – Texel
EHVB – Valkenburg Airbase – Valkenburg
EHVE - TrafficPort Venlo - Someren near Venlo
EHWO (WOE) – Woensdrecht Air Base – Woensdrecht
Recently I ran across another real-time flight tracker in the Netherlands for Google Earth. The Geluidsnet web site (in Dutch) lets you watch planes arriving and departing from a few airports through this Google Earth network link [Google Earth Required. You must have GE installed.] (once it loads, click on "Schiphol area" to see the tracks for the last 30 minutes). They display a vertical "fence" below each plane to help visualize the altitude and paths. Orange fences are arriving aircraft, green are departing. The visualization gives a better sense of position and the number of planes when viewed from an angle. If you look closely, you will notice every few seconds the positions (and fences) change.