generate the IP addresses from the ASN database

[randomgambit]

Hello and thanks for this wonderful package.

I know I can use this:

with geoip2.database.Reader('/path/to/GeoLite2-ASN.mmdb') as reader:
 response = reader.asn('1.128.0.0')
 response.autonomous_system_organization

to get the autonomous_system_organization for a given IP.

Something I was not able to figure out is whether this package can generate all the possible IPs for each autonomous_system_organization in the maxmind ASN database. For instance, can we get the IPs by iterating over the IP networks in CIDR format that are in the data? Is there a method for that?

Thanks!

[oschwald]

Unfortunately, this is not currently possible with this package. There is an issue for maxminddb that suggests adding the network information to a lookup, which could be used like this. The Perl reader and the third-party Go reader both have a way to iterate over the database, which also could be used for this.

Right now, the easiest solution would be to just use our CSV databases for this purpose. The ASN one can be downloaded from https://dev.maxmind.com/geoip/geoip2/geolite2/

[randomgambit]

thanks @oschwald , very useful. I may have found a package that can do that

from netaddr import IPNetwork
for ip in IPNetwork('192.0.2.0/23'):
... print '%s' % ip
...
192.0.2.0
192.0.2.1

but that raises two questions:

1. are the IP addresses generated from the CIDR in a deterministic way?
2. how does maxmind come up with the ASN mapping anyway? I have looked online and I cannot find a single source for this kind of data.

Thanks again for helping! Keep up with the great work