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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical 223.255.255.0/24
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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