AT&T, Sprint, Verizon have decided to waive call and text message fees to Japan for the month of March. Also Comcast Communications and Cox Digital. Here is an article on Engadget about it. Check with your carrier to see if it applies to you.
There are a number of organizations trying to help people find out about their friends and relatives. Many of them do not post public information because of privacy concerns. In those cases there are forms to fill out and presumably you will get a direct response. The phone companies, for example, will check cell phone numbers of their subscribers for you. You will not see the information made public.