It sems like re-REGISTERS where seen as new ones. Have a look at the contact matching doc: http://www.opensips.org/html/docs/modules/devel/usrloc.html#contact-matching-algs It would also be nice to see the first REGISTER and compare it to the re-REGISTER so we could undertand why this happened. -- /Saúl http://www.saghul.net | http://www.sipdoc.net