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Repeaterbook.com's primary purpose is to list repeater listings across the world. But we also recognize that simplex nodes are a valid use of the radio spectrum and there are not a lot of opportunities to list nodes on the Web. To this end, Repeaterbook.com has agreed to list simplex nodes in a special section.
A simplex node is any radio system that is connected to a digital Internet modem. This is not the same as a simplex repeater, which records audio from a remote user and replays it on the same frequency to a wider area.
To be listed on Repeaterbook.com, the simplex node must be operational and open for use by all amateurs. No closed or private simplex nodes will be listed. Also, frequent requests for changes to a simplex node on Repeaterbook.com may be cause for removal from the directory. Frequent changes increase the workload of the admins.