[HECnet] Request for comments on subdividing area 9

Hello! The current way I allocate node numbers is in sequential order and it's getting tremendously messy and difficult to manage, so I am going to come up with a plan to divide things more cleanly and I'm looking for feedback. I'm thinking: 9.1-9.21 for administration/control purposes (area routers and so forth), subdividing the area in to geographic areas (areas of ~250 each initially, the others can be further subdivided as needed), and then subdividing those geographic regions by purpose. so: (apologies about this chart being absolutely atrocious and useless, it functioned largely as stress relief) 9.1-9.21 | V relief OHIO (9.22-9.271)-----|----------------|-------------------| | | | | | V V V V V (VMS) (PDP-11) (PDP-10) (OTHER) (WORKSTATION) 9. (22-.72) (73-123) (124-174) (175-225) (226-278) And repeat for other regions. Should I subdivide further? What could I use instead of OTHER? Should I break up the area differently? Further suggestions? Should I put physical hardware as a sub-sub-subdivision, its own tertiary level (in place of OTHER), or not differentiate them at all? Let me know your thoughts.