ip-location-db/iptoasn-asn
| Database | Type | License | Updated | IPv4 | IPv6 | IPv4-num | IPv6-num |
|---|---|---|---|---|---|---|---|
IPtoASN 
|
ASN | PDDL by IPtoASN | Daily |
CSV MMDB |
CSV MMDB |
CSV | CSV |
ip_range_start, ip_range_end, autonomous_system_number, autonomous_system_organization
ip_range_start and ip_range_end are either IP addresses, or IP addresses in numeric format (depending upon which files you choose) and these two fields represent an inclusive range of IP addresses for that data row.
For example, in the -ipv4.csv files, the CSV line: 1.0.0.0,1.0.0.255,AU would mean that any IP addresses between 1.0.0.0 and 1.0.0.255 (inclusive) are AU. In -ipv4-num.csv files, the equivalent line would be: 16777216,16777471,AU.
For example, in the -ipv6.csv files, the CSV line: 2001:200::,2001:200:ffff:ffff:ffff:ffff:ffff:ffff,JP would mean that any IP addresses between 2001:200:: and 2001:200:ffff:ffff:ffff:ffff:ffff:ffff (inclusive) are JP. In -ipv6-num.csv files, the equivalent line would be: 42540528726795050063891204319802818560,42540528806023212578155541913346768895,JP.
Please be careful when using IPv6 and IPv6-num files in your program, the numerical value exceeds 32bit unsigned integers, and you would need to use a 128bit unsigned integer.
autonomous_system_number is a unique number assigned to an Autonomous System (AS) by the IANA. wiki.
IPtoASN database [Update: Hourly]
You can download hourly updated database in tsv format from original site.
This is licensed under a Public Domain Dedication and License v1.0.
There are some differences from above ASN database.
This files are subject to the Public Domain Dedication and license v1.0. You may use these databases without attribution for any purpose.