Try the site above. Here's an excerpt from the site:
Active Duty Member Information
The Coast Guard World Wide Locator has duty stations for active duty personnel.
To locate Active Duty Personnel Only: The telephone number is (202) 493-1697 or
Send us an e-mail with the person's full name to CGlocator@Ballston.uscg.mil
Coast Guard Personnel Command does not have custody of crew lists or current addresses for former Coast Guard service members.
Caution: The author of this post is a product of the US public education system.