There is a new report at: http://figaro.ans.net/route-dumps/970520/overlap-summary.html Summary: There are 114 AS in which aggregates are registered and unregistered more specific prefixes announced but for which the aggregate is not announced. Some of these may be cases where the aggregate is not being formed due to a configuration error. There are 197 of these registered but unannounced aggregates. These aggregates overlapped 840 prefixes. There is an updated report on unregistered prefixes at: http://figaro.ans.net/route-dumps/970520/ These two reports used the May 9 routing dumps but use copies of the routing registries from May 19, reflecting changes made since May 9. The original reports are at: http://figaro.ans.net/route-dumps/ The main page has not been updated to reflect this third iteration. Curtis btw- This was previously announced to NANOG only. I'm not sure what distribution list is appropriate. Suggestions by private response please to avoid clogging the mailing lists.