ASN to IP Mapping

John McCormac jmcc at
Sun Mar 8 12:37:28 UTC 2015

On 08/03/2015 09:32, Geoff Huston wrote:
> 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;
>   - 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

Some of the EU allocations seem to be CDNs and other trans-national 


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