Crate asn_db

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.).

Example

Load database from ip2asn-v4.tsv file and lookup 1.1.1.1 IP address.

use asn_db::Db;
use std::fs::File;
use std::io::BufReader;

let db = Db::form_tsv(BufReader::new(File::open("ip2asn-v4.tsv").unwrap())).unwrap();
let record = db.lookup("1.1.1.1".parse().unwrap()).unwrap();

println!("{:#?}", record);
println!("{:#?}", record.network());

This prints:

Record {
    ip: 16843008,
    prefix_len: 24,
    as_number: 13335,
    country: "US",
    owner: "CLOUDFLARENET - Cloudflare, Inc."
}
1.1.1.0/24

Usage

Use Db::from_tsv(input) to load database from ip2asn-v4.tsv data. You can then use db.store(output) to store the binary encoded data index for fast loading with Db::load(input).

Use db.lookup(ip) to lookup for matching record by an IP address.

Structs

Db	ASN record database that is optimized for lookup by an IP address.
Ipv4Net	An IPv4 network address.
Ipv4Addr	An IPv4 address.
Record	Autonomous System number record.

Enums

DbError
TsvParseError

Functions

read_asn_tsv

Reads ASN database TSV file (ip2asn-v4.tsv format) provided by IPtoASN as iterator of Records.