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223.255.255.0/24

  • From: bdragon
  • Date: Thu Feb 20 01:51:16 2003

223.255.255.0/24 has historically been designated as a special-use network
as it is the numerically highest Class C network. It is listed in
RFC3330 as Reserved but open for possible future allocation.

Now that 222/7 has been allocated to APNIC, the question comes up as to
whether it is retaining the Reserved designation, or whether APNIC will
keep it as reserved. I note that the APNIC whois servers do not denote
it as Reserved.

I bring this up since many bogon filters include this network for both
routing and packet filtering.

I have queries out to both APNIC and IANA as to the present status of
that network, but I expect IANA will likely defer to APNIC.

If it is no longer reserved, I've suggested that RFC3330 be updated
to reflect its present status (such as prior-special-use networks
are listed).

In any event, pending confirmation from APNIC, I suggest folks look over
their own bogon filtering. A quick check of Rob's list doesn't have
this network specified. I believe that Juniper has a prebuilt bogon
list, but I don't recall whether this network is on it or not.

I've suggested APNIC send out email to the operations community, but
if they don't, I'll send an update with whatever they send me.





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