Country code: +31
Alphabetic Yellow Pages telephone directory of people and businesses in the Netherlands. In Dutch. Put who or what you're looking for in war/wie and location (if needed) in waar and click zoek.
Comprehensive White Pages for people and businesses in Netherlands; in Dutch. Enter what service or company or the person you're looking for Wie/wat zoekt u? and an optional location Waar and then click on Zoeken (search). When the results are shown select the contact you want and click on Telefoonnummer tonen - show number. To search for businesses use the Bedrijf tab and for people, Persoon.
Online phone directory for the Netherlands, in Dutch only. You can search for people (particulier), organisations (vereniging) and businesses (bedrijven), by putting the name or keyword in Zoekopdracht and optional location Plaats. There is also an option to search by number (reverse search) by selecting nummer, address (adres), postcode or name (naam) - you'll need to put the location in when searching by name though - from the Quick Navigation (snel navigeren) bar above the main search box area. The quick navigation options don't seem to work in all browsers though - Chrome in particular. Results include map links.