asterisk dialplan changes

I need a little help in Asterisk. Let's say i have DIDs from 100 to 110 (so a DID range). Inbound calls from this DiD range should end at extension 200. So when I call 100, then 200 should ring. It is done in freepbx, but when I call 100, 200 rings, but the "called number" is 200, and not 100. See the problem? I would like to see a dialplan for this, so when i dial 100, then asterisk should dial 100, and rings 200 (so the dialed number should be 100, but rings 100 at 200's location). these are just examples, not a real DIDs, extensions, etc. But I would like to see this done, should be an easy task with an experienced Asterisk guy.