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ASN to IP Mapping

> Users of this report should be aware that there are some subtle deviations from this spec in the published data:
> - the RIPE NCC uses the non-ISO 3166 2 letter code 'EU' for some allocations. I do not know exactly why;

EU is, of course, an ISO-3166 2 letter code, it just happens to be "Exceptionally Reserved". I would naively have assumed EU was used for entities that span multiple European countries.

> - the date field is not quite as described in that file for ARIN entries. Again, I do not know why.
> - the RIPE NCC does not provide the "opaque-id" in their records



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