Maxmind's GeoLite Legacy Downloadable Databases contain ASN for IPv4 and IPv6 at:Both binary and CSV data formats are available to download for free. A CSV entry may look like this:,'AS20001 Time Warner Cable Internet LLC'The first two fields are IP address range in decimal.
Find out what your public IPv4 and IPv6 address is revealing about you! My IP address information shows your location; city, region, country, ISP and location on a map. Many proxy servers, VPNs, and Tor exit nodes give themselves away. Alamat IP publik ditugaskan untuk komputer oleh Internet Service Provider secara langsung setelah komputer terhubung ke gateway Internet. Sebuah alamat IP publik dapat berupa statis atau dinamis. Sebuah alamat IP public static tidak dapat berubah dan digunakan terutama untuk hosting halaman Web atau layanan di Internet.
The last field contains the ASN and the entity name.Alternatively, Internet-Wide Scan Data Repository (which recently launched Censys with free online search and API) includes a regular DNS lookup for all IPv4 PTR records at:The freely downloadable CSV file contains entries such as:99.99.99.90,adsl-99-99-99-90.dsl.lsan03.sbcglobal.netThe first field is the IP and the second field is the host name which you may be able to use to infer ISP.