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53 lines
2.1 KiB
Markdown
53 lines
2.1 KiB
Markdown
# ipverse-asn-ip
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IPv4 and IPv6 subnets (e.g. 100.2.30.0/22) organized by announcing autonomous systems. The subnets are aggregated to save space.
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This repository is updated daily.
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## Use cases
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- Firewalling, e.g. to ban all IP addresses from that notorious, Spam-friendly network provider
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- Route advertisment check, see if/how the routes of a specific autonomous system are seen (even over time, thanks to Git's changelog)
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- Find out more about a specific ASN (autonomous system number) using the provided lookup table (currently .csv format only) or use it in your own software project for bulk/offline use
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- Statistical analysis purposes, e.g. the number of public IPv4 addresses currently announced vs unused/unassigned
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## How to use
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To download the announced subnets for a specific autonomous system (AS1234 IPv4 adresses in this example), try:
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```$ curl https://raw.githubusercontent.com/ipverse/asn-ip/master/as/1234/ipv4-aggregated.txt```
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The same for all IPv6 subnets from AS1234:
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```$ curl https://raw.githubusercontent.com/ipverse/asn-ip/master/as/1234/ipv6-aggregated.txt```
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The data (IPv4 + IPv4 combined) is available in JSON format as well:
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```$ curl https://raw.githubusercontent.com/ipverse/asn-ip/master/as/1234/aggregated.json```
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The resulting JSON will look similar to this:
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```
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{
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"asn": 1234,
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"handle": "FORTUM",
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"description": "Fortum",
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"subnets": {
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"ipv4": [
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"132.171.0.0/16",
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"137.96.0.0/16",
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"193.110.32.0/21"
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],
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"ipv6": [
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"2405:1800::/32"
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]
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}
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}
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```
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To download the latest lookup table used to enhance the generated route data:
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```$ curl https://raw.githubusercontent.com/ipverse/asn-ip/master/as.csv```
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If you plan to use the routing data for firewalling purposes, have a look at:
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- [ipset-blacklistlist](https://github.com/trick77/ipset-blacklist) ipset/iptables based Bash script, IPv4 only
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- [todo](https://localhost) insert link to a popular project with nftables and IPv6 support
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## Yeah, but how to I get the ASN for an IP address?
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Check out this excellent blog post: https://blog.jiayu.co/2018/10/quick-url-to-asn-lookups/
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