After some testing it has been concluded that call sign routing does not work if you are using a standard cellular connection like Sprint, AT&T, T-Mobile, Verizon, etc. if you are using Ircddb group 1 or group 2 servers. This includes using Starnets too. It does work with Freedom pop. It will also work if you are using the Quadnet server for Ircddb.

If you use the quadnet server, you will not be able to route to those users that are on group1 or group 2.
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Fran, W1FJM