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http://www.sarsat.noaa.gov/beacon.html
Register Your Beacon
The Most Important Step
NOAA is proud to announce that the National Beacon Registration Database for U.S. coded beacons is available online! Emergency beacon owners can register and update their beacons directly via the internet.

If you purchase a new or used U.S. coded 406 MHz beacon you
MUST register it with NOAA as required by law. If you change any information on your registration (such as phone number, address, bought a new boat, etc.) you
MUST update the 406 MHz beacon registration with NOAA. Also, if you sell your 406 MHz beacon, notify NOAA that you have done so, inform the buyer that they must register the beacon for themselves. Otherwise, you may be contacted by rescue authorities if it is activated! Please provide the new owner our phone number or this web page so they can register the beacon.
If you have previously registered your 406 MHz beacon with NOAA but have not accessed your registration information via our online registration site, you can access your beacon (just be sure you have your 15-digit Unique ID at hand) and view/update your registration now!
You should confirm the accuracy of the information registered with NOAA (particularly the beacon ID) after receiving confirmation that your beacon has been registered. Notify NOAA immediately if inaccurate.
The online registration capability is a significant advantage to beacon owners. Beacon owners can update their registration information as often as it changes. And the update is done immediately instead of having to wait to either fax or mail your changes in. It is important to note, however, that your registration is valid for only two years and you are required to re-register the beacon every two years so that we can maintain up-to-date records on your contact information. We will attempt to contact you every two years to confirm this information. Please keep in mind: it is important to contact NOAA anytime your contact information changes!