Hi Keith, you can take the from userpart from the pseudovar $fU. Find further infos on the pseudovar documentation site: http://www.kamailio.org/wiki/cookbooks/4.1.x/pseudovariables After that you can try to match that with the module regex, see documentation here: http://kamailio.org/docs/modules/4.1.x/modules/regex.html But I recomend using "app_perl". By that you get the whole SIP-message. Apply PERL regexpower onto it and return some values via avps, or insert branch directly in perl. Depending on how sophisticated your LCR rules are using the LCR-Module or any other module might also be worth a thought. greetz Am 29.07.2014 21:55, schrieb Keith: -- Moritz Graf, M.Sc. Betrieb NGN-Plattform G-FIT GmbH & Co. KG Greflingerstr. 26, 93055 Regensburg