Country code: +972
White Pages for Israel - includes phone numbers of all Israeli residences and many mobile phones.
Simple to use reverse look up site - choose the area code from the drop down box and then enter the rest of the number in the second box.
Telephone directory for Israel. Search for people or businesses; when the people search results are shown, you will need to click on 'show number' to display the one you want. Business results show maps as well. In a mix of English and Hebrew.