Hello, Faced with a very weird issue. SIP provider shows 404 returned from 3cx when routing inbound calls (outbound works fine)... -Turn logging to verbose, make test call -3CX gets the call, begins to route it to the IVR --3CX fails saying it can't build a route. So I look closely.. and here is what it shows. No information is removed here, this is literally what it shows. Phone number has been changed for privacy. Code: Call(C:97): Making route(s) from Line:10000<<+12223334444 to <sip:800@:5060> Followed by: Code: Call(C:97): No known route from Line:10000<<+12223334444 to target:<sip:800@:5060> Obviously this is a problem, it should show Code: Call(C:97): Making route(s) from Line:10000<<+12223334444 to <sip:firstname.lastname@example.org:5060> (see the missing internal IP address) Running on Linux, latest stable version. The first time this happened, I made a backup, uninstalled, purged, reinstalled, restored backup. All was well. Now, it happened again. I haven't touched the install in over a week, wake up, same issue, same cause. I had auto backup turned on for once a week, so I restored the backup from a few hours beforehand, and now it is working again. I'm really confused by what could cause this and what the best way to fix this is. Ideas?