asn-db
is a Rust library that can load and index ASN database (ip2asn-v4.tsv
file) from IPtoASN website.
Once loaded it can be used to lookup an IP address for matching ASN record that contains:
- network base IP address and mask (e.g. ipnet::Ipv4Net value like
1.1.1.0/24
), - assigned AS number (e.g.
13335
), - owner country code (e.g.
US
), - owner information (e.g.
CLOUDFLARENET - Cloudflare, Inc.
).
It is also possible to write and then read optimized binary representation of the database to a file for fast load times. Note that at this time only IPv4 records are supported.
Example
Load database from ip2asn-v4.tsv
file and lookup 1.1.1.1
IP address.
use Db;
use File;
use BufReader;
let db = form_tsv.unwrap;
let record = db.lookup.unwrap;
println!;
println!;
This prints:
Record {
ip: 16843008,
prefix_len: 24,
as_number: 13335,
country: "US",
owner: "CLOUDFLARENET - Cloudflare, Inc."
}
1.1.1.0/24