Hello, you can do this with the usrloc and registrar modules, there are functions to check lookup and registration status. Cheers, Henning -- Henning Westerholt - https://skalatan.de/blog/ Kamailio services - https://gilawa.com -----Original Message----- From: sr-users <sr-users-bounces(a)lists.kamailio.org> On Behalf Of ahmed moghazy Sent: Tuesday, November 10, 2020 11:41 AM To: sr-users(a)lists.kamailio.org Subject: [SR-Users] Checking user registration I want kamailio to reject call and send message user is not registered when a caller is trying to call unregistered user (callee) , Thank you. _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users