[tor-dev] GeoLite ASN Database broken

[nusenu]

Dear MaxMind Support,

your GeoLite ASN database [1] appears severely broken.
(probably by a recent code change on how AS names are collected)

Karsten Loesing from the Tor Project determined [2] that the amount of
records with nameless autonomous system entries in your DB increased
from ~500 (Feb 2016) to over 57000 in the current version (June 2016):

grep '"' -v GeoIPASNum2.csv |wc -l
57179

but the actual root cause probably affects *all* entries in the database.

After investigating weird AS names in your DB called "73-75 Dr.
Staicovici" (AS8708) or "Warszawa 02-822" (AS12741), it appears as if
you are using the first "descr" line instead of the actual AS name.

Example:
AS Number: AS8708
AS Name according to MaxMind: "73-75 Dr. Staicovici"
actual AS Name according to [3]: RCS & RDS SA
http://bgp.he.net/AS8708#_whois

[1]
http://download.maxmind.com/download/geoip/database/asnum/GeoIPASNum2.zip

For more background see the Tor Project's bugtracker entry:
[2] https://trac.torproject.org/projects/tor/ticket/19420

thank you for looking into this,
nusenu
(I'm not a member of the Tor Project)

[3] http://thyme.apnic.net/current/data-used-autnums


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