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Q.850 cause 3: No route to destination

No route to the destination: the network does not know how to reach that number.

3

Q.850 name: No route to destination
Group: Normal events
FreeSWITCH: NO_ROUTE_DESTINATION
Asterisk: HANGUPCAUSE=3
SIP response from a gateway: 404 Not Found
In SIP: Reason: Q.850;cause=3

Why it happens

No route for this prefix on your PBX or at the carrier.
The destination is not enabled on your account (for example international or premium).

What to check

Check the outbound routes on the PBX and ask the carrier whether the destination is open for you.