My SIP Invite: INVITE sip:firstname.lastname@example.org:5060;rinstance=084eee3438cc22fb;received=10.112.189.140:5060 Here my DID is clearly before the destination IP Address, "INVITE SIPID@IP:5060;" In the Provider Source ID tab: I have checked the "Source indentification by DID" box, Selected: "Request Line URI : User Part" as the "SIP Field containing DID numbers", added masks for the DID's such as: 4124992700 4124992701 4124992702 Then added the DID's to the DID tab in the Edit VOIP Provider. Calls still only route to the destination setup under the "Edit VOIP Provider" screen, no matter the routing on the spific DID's further down the tree. I have also tried setting the fields ReqLineURI : User Part to Line ID and Line Number on the Edit Voip Provider screen to no avail. Followed this link as well: http://support.orbtalk.co.uk/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=32 I have searched quite a few posts and have not been able to solve this as of yet. Any ideas appreciated.