<HTML><BODY>As my friend (Kirill Galinurov, an active OpenSIPS user) told me just now, <br>- use 'allow_register' function with register.allow/register.deny files;<br>- use 'check_address' function with 'address' table.<br><br>Though I haven't tried yet.<br><br>Regards, Alexey</BODY></HTML>