To call Holland you dial your international dialing code, followed by 31 (country code for Holland), then the area code (omit the first zero) and the local number. 

Some important area codes: 

Calling within Holland

Orange-and-gray colored telephone booths are located inside and around most Netherlands Railways stations. From these booths you can make calls with coins, credit cards and special telephone cards. Telfort telephone cards are available from the GWK – Holland Welcome Service, Wizzl Shops at a wide range of railway stations and all ticket offices at the Netherlands Railway stations.

The Telfort booths have a starting tariff of EUR 0,10. The consequent units cost EUR 0,10 per unit. It follows that a telephone call from one of these booths costs a minimum of EUR 0,20.

If you wish to make a telephone call from a green telephone booth (located outside railway stations) you need a different telephone card. These are available from, among other places, the GWK - Holland Welcome Service offices, post offices and major department stores.

The phone nummer for emergencies is 112. If you are not in an emergency situation, but you wish to contact the police, 0900 88 44 (only within Holland). Please note that this is not a free call.