You have several options. There is an online application on the DEEP website under boating. It is the Request For A Hull Identification Number Application. You can fill that form out and send it to the Boating Division at deep.boating@ct.gov. If you can't find the form online, you can use the same email address listed above and request the application be sent to you either by mail or email. Or you can call the boating division at 860-434-8638.