#asn #ip-address #ip

asn-db2

Lookup an IP address for matching ASN information in the database from https://iptoasn.com/

2 releases

0.2.2 Aug 5, 2023
0.2.0 Aug 3, 2023

#1158 in Database interfaces

MIT license

18KB
388 lines

Latest Version Documentation License

asn-db2 is a Rust library that can load and index ASN databases (ip2asn-v4.tsv, ip2asn-v6.tsv, ip2asn-combined.tsv files) from IPtoASN website.

This crate is a rewritten fork of Jakub Pastuszek's asn-db crate.

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.).

Both IPv4 and IPv6 addresses and networks are supported.

Example

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

use asn_db2::Ipv4Database;
use std::fs::File;
use std::io::BufReader;

let db = Ipv4Database::from_reader(BufReader::new(File::open("ip2asn-v4.tsv").unwrap())).unwrap();
let entry = db.lookup("1.1.1.1".parse().unwrap()).unwrap();

println!("{:#?}", entry);

This prints:

Entry {
    subnet: 1.1.1.0/24,
    as_number: 13335,
    country: "US",
    owner: "CLOUDFLARENET",
}

Dependencies

~2–2.9MB
~44K SLoC