If you would like to contact an embassy or consulate you can go to http://usembassy.state.gov/ for access to U.S. Embassy and Consulate webpages.
Note that, in accordance with the Privacy Act, the Department of State may not release information about those registered without their express written authorization.
If your family needs to reach you because of an emergency, they can pass a message to you through the Office of Overseas Citizens Services, which can be contacted from within the United States at 1-888-407-4747 (toll free), and from overseas at 202-501-4444. The Office of Overseas Citizens Services will contact the U.S. Embassy or Consulate in the country in which you are traveling in order to pass the message to you.