Strange; how do they manipulate an area code; I don't believe 000 is possible. This # appeared on my Caller ID; no message was left.
Again, I recommend answering these unwanted calls, immediately asking the caller to hold, placing the call on HOLD; check back every four minutes or so. Alternatively, you can pick up, then hang up, immediately. Keep doing that everytime you receive an unwanted call . Eventually they'll get the idea. In the meantime, you cost them.