[registrars] Using IANA IDs

[Eric Brunner-Williams in Portland Maine]

Rob,

I agree that it seems that the IANA allocations are one-time, however,
there are non-allocations that show up in registries (see Jay's note),
and when an IANA code point is "de-allocated", how is the name of the
defunct (or at least not currently "in status", dues, policy or whatnot)
recovered?

Who were registrars #4-7, what is #8, who was #10-12, 17-30, et seq.?

Eric