As per their page: Amateur Radio's most comprehensive, worldwide, free repeater directory. Encouraging and supporting over-the-air repeater use.
The repeater database is separated into two categories:
- North America: This area includes the USA (including the US territories of Puerto Rico, Guan, and American Samoa), Canada, and Mexico.
- Rest of World: This area includes all other countries and territories not covered under North America above.
The Repeater Subscriptions menu item leads to the Repeater Change Notification System.
Annually, Repeaterbook.com processes more than 18,000 repeater adds, edits, and deletes. That's a lot of change, and you want to know when these changes happen, so you can keep your radio programming current. What good is a memory in your radio if it tries to key up a dead repeater? What if the CTCSS code changed? And you certainly don't want to miss that new repeater that just went operational. You could memorize our database (40,000 repeaters) and then check back every so often to see what changed, or, you can let us just shoot you an email and let you know when it happens.
What is the Repeater Change Subscription System? This is the module we built to notify you when there is a repeater add, edit, or delete. You can subscribe to an entire state or province, and if you are tracking repeaters in the United States, you can even track down to the county level. We will let you filter down the results to a specific band (do you want to know about the 1.25 meter and 6 meter changes if you don't own those radios?) or even a specific operating mode. Maybe you have a DMR radio and you want to know when a new DMR repeater pops up in an area.
How often will I get an email? Every Monday morning, we will send you a single notification about any repeaters that were updated during the last 7 days. No matter how many areas you sign up for, you will receive a single email. Depending on how many updates there were, it could be long or short. If you feel you no longer need the emails, there is an option to delete your subscription here on this page, or from the email itself. You have full control of the areas you subscribe to.
What types of changes do you report? All changes! The way we compile the list is to look at the date the repeater was added or last updated. This update date cannot be manipulated, so whenever an admin submits the add or changes, the date is set by the server. We search for all repeaters with an update within the last 7 days, and if it matches one that you subscribed to, we let you know. Not all updates have a meaningful change, or in other words, a change that affects the operation of the repeater. It may have been a minor grammar adjustment or an admin just researching the repeater and updating that it is still operational. We apologize if that confuses anyone, but we wanted to make sure you were notified any time someone touches the repeater record.
How can I help? Now that you have received information from the site, we hope that you will be inspired to give a little. We depend on users like you to help us keep our database as up-to-date as possible. You might think that there was a national database or legal requirements to report repeater information, but there isn't! This all has to be gathered up and curated. We do all of this for you for free! If you find that there are any errors in the repeaters, please let us know right away.
Who can use the module? Anyone with a Repeaterbook.com account can use the module. Currently, the module is only available for countries in North America. We will be adding the rest of the world and the ability to subscribe to a location and search radius in the future.
A note about the Proximity Subscription Service The search radius is not a true circle, but rather a square. A box is drawn around the centerpoint of the location to the north, south, east, and west. This means the distance into the corners is slight further and may result in some results outside the intended radius. Also, the Google Maps API is used to geolocate your subscribed location. The service can only return results if it is able to determine a latitide and longitude from the location you entered.
What is geocoding? Geocoding is the process of converting addresses (like "1600 Amphitheatre Parkway, Mountain View, CA") into geographic coordinates (like latitude 37.423021 and longitude -122.083739).
Link seems secure (https://)