> [!CAUTION]
> **🚨 CRITICAL NOTICE: Data Bugs & Migration**
>
> Please be aware that the current data published to `npm` and the `main` branch **contains bugs resulting in incorrect data**.
>
> To immediately resolve these data accuracy and compliance issues, **updates via `npm` are completely deprecated and will stop.**
>
> The corrected data and new, compliant generation logic are already available in the **[`main-test`](https://github.com/sapics/ip-location-db/tree/main-test)** branch.
> We will be completely replacing the `main` branch with this structure very soon.
>
> **Action Required:** We strongly urge all users to switch immediately to avoid using incorrect data.
> Please update your systems to download the latest data directly from our [GitHub Releases](https://github.com/sapics/ip-location-db/releases).
# [ip-location-db](https://github.com/sapics/ip-location-db)/asn-mmdb
## Download
| Database | Type | License | Updated | IPv4 | IPv6 | IPv4+IPV6 | IPv4-num | IPv6-num |
|---|---|---|---|---|---|---|---|---|
| [RouteViews + ASN + DB-IP](https://github.com/sapics/ip-location-db/tree/main/asn/)
[](https://www.npmjs.com/package/@ip-location-db/asn)
[](https://www.npmjs.com/package/@ip-location-db/asn-mmdb) | ASN | [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) by [RouteViews](https://www.routeviews.org/routeviews/) and [DB-IP](https://db-ip.com/) and [NRO](https://www.nro.net/) | Daily | [CSV](https://cdn.jsdelivr.net/npm/@ip-location-db/asn/asn-ipv4.csv)
[MMDB](https://cdn.jsdelivr.net/npm/@ip-location-db/asn-mmdb/asn-ipv4.mmdb) | [CSV](https://cdn.jsdelivr.net/npm/@ip-location-db/asn/asn-ipv6.csv)
[MMDB](https://cdn.jsdelivr.net/npm/@ip-location-db/asn-mmdb/asn-ipv6.mmdb) | [MMDB](https://cdn.jsdelivr.net/npm/@ip-location-db/asn-mmdb/asn.mmdb) | [CSV](https://cdn.jsdelivr.net/npm/@ip-location-db/asn/asn-ipv4-num.csv) | [CSV](https://cdn.jsdelivr.net/npm/@ip-location-db/asn/asn-ipv6-num.csv) |
## MMDB Format
```
autonomous_system_number, autonomous_system_organization
```
### autonomous_system_number
`autonomous_system_number` is a unique number assigned to an Autonomous System (AS) by the [IANA](https://www.iana.org/). [wiki](https://wikipedia.org/wiki/Autonomous_system_(Internet)).
## Referenced Database and License
### [RouteViews](https://www.routeviews.org/routeviews/) database [Update: every 2 hours]
We are using this database to get AS number from ipv4 address for [asn](https://www.npmjs.com/package/@ip-location-db/asn).
This is licensed under a [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/).
### ASN database [Update: Daily]
Created by merging 5 RIRs ([afrinic](https://afrinic.net), [apnic](https://www.apnic.net), [arin](https://www.arin.net), [lacnic](https://www.lacnic.net), [ripe ncc](https://www.ripe.net)) IP-ASN-Country database.
[ASN (Autonomous System Number)](https://wikipedia.org/wiki/Autonomous_system_(Internet)) is a unique number assigned to an Autonomous System (AS) by the [IANA](https://www.iana.org/).
Data source licensed under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) by the [NRO](https://www.nro.net/).
### [DB-IP](https://db-ip.com/) database [Update: Monthly]
You could download and read the license from [ip-to-asn-lite](https://db-ip.com/db/download/ip-to-asn-lite) or [ip-to-country-lite](https://db-ip.com/db/download/ip-to-country-lite) or [ip-to-city-lite](https://db-ip.com/db/download/ip-to-city-lite).
Most of the AS Organization name used in [asn](https://www.npmjs.com/package/@ip-location-db/asn) uses [ip-to-asn-lite](https://db-ip.com/db/download/ip-to-asn-lite) database.
We also use [ip-to-asn-lite](https://db-ip.com/db/download/ip-to-asn-lite) to get AS Number from ip address as a supplemental.
These database are licensed under a [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/).
In the case of a web application, you must include a link back to DB-IP.com on pages that display or use results from the database. You may do it by pasting the HTML code snippet into your code: `IP Geolocation by DB-IP`.
If you need better accuracy or no attribution or daily updates, please use the [Commercial Version of db-ip](https://db-ip.com/db/ip-to-country).
## Merge rule for multiple database
When merging multiple database, set the front database above back one.
For example, geo-whois-asn-country is created by merging 3 database with GeoFeed > Whois > ASN.
In more detail, the geo-whois-asn database matches the GeoFeed results, for ip ranges not covered by GeoFeed it matches the Whois results, and for ip ranges not covered by either it matches the ASN results.
```
GeoFeed: 1.0.0.0, 2.0.0.0, AU
3.0.0.1, 4.0.0.0, US
Whois: 1.0.0.0, 2.2.0.0, FR
2.5.0.1, 4.0.0.0, IN
ASN: 1.0.0.0, 4.0.0.0, JP
```
is converted to
```
GeoFeed-Whois-ASN: 1.0.0.0, 2.0.0.0, AU
2.0.0.1, 2.2.0.0, FR
2.2.0.1, 2.5.0.0, JP
2.5.0.1, 3.0.0.0, IN
3.0.0.1, 4.0.0.0, US
```