The international code for Spain is +34. All numbers in Spain are nine digits long, the first three are the area code.

Public pay phones
Public pay phones in Spain are blue and easy to use, you can find them in hotels, bars/restaurants and in the street (cabinas). They accept euro coins and tarjetas telefonicas (phone cards) which come in different denominations. They are available at post offices, tobbacconists and estancos and are usually more economical and safer than carrying cash around. Some phones do not accept cash anyway. They can be used until the credit expires. To use them tear off the breakable section at the top before inserting in the payphone. When you dial, its value appears in the window. After you hang up, the card is returned so you can use it until its value runs out. The best time to phone is usually between 10pm and 8am or anytime on Sundays or holidays.

Area Codes
Here is a list of Spanish area codes:

Calling Internationally
The best option for dialling internationally is to buy a card with a calling number (these do not insert into the pay phone but can be used at pay phones). Instructions and numbers are listed on the back of the cards. Some of these have a set rate for phoning at any time of day. There is usually a choice of languages.

Direct dialling links
The following sites list international dialling codes:
http://kropla.com/dialcode.htm
http://www.the-acr.com/codes/cntrycd.htm

International phone cards
http://www.recil.net/ospiti/topphone

Mobile Phones
Many travellers choose to travel with mobile phones for making reservations, keeping in touch with family and friends (especially other travel friends) and are essential if you are looking for work. Generally a pre-paid mobile phone deal will ultimately save you more money. Spain and most European countries use the 900 Mhz GSM mobile network so most mobile phones purchased in Australia, New Zealand or South Africa will work in as long as the SIM card is not locked. The GSM system is not compatible with mobile phones in North America or Japan. Some mobile networks use the 1800 Mhz system which work with dual-band phones. In Spain there are a number of mobile phone networks.
 
Voicemail and Fax
Voicemail is a good option if you don't have a phone but still want a phone number. If you need to send or receive faxes in Spain many post offices, shops or offices with "Fax Publico" signs can do this for you.