I'd say use WTF: http://new.myfonts.com/WhatTheFont/

Most certainly custom.

Like Jan said, it's a custom made font, not available to the public.

However, I've attached a small sample of the font that might help you find a substitute for it.

The uppercase reveals this started out as FF DIN.

Konsens by Hubert Jocham and Nudista by Tomas Brousil could be interesting as substitute.

Did you draw this, David?