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. In Hebrew and Russian. This site used to offer an English version as well but the link no longer works. The first tab on the right is businesses; category, keyword and location are options. The second tab is for people search. The name of the person goes in the first box (from right to left) and the city/location in the second box. The third tab is Government departments and the fourth tab (again, working from right to left) is a map based search.