
CC2ASN
A simple lookup service for AS-numbers and prefixes belonging to any given country in the world.
Read moreA simple lookup service for AS-numbers and prefixes belonging to any given country in the world.
Read moreASN - an autonomous system (AS) is a collection of connected IP routing prefixes under mutual administration, usually by a single organization or entity. Read more
Prefix - Subdivision of an internet protocol (IP) network, where the routing prefix is expressed in CIDR-notation. Read more
CC - a country code (CC) is a unique numeric representation for the country. This services uses the ISO 3166-1 Alpha-2 standard codes (e.g. 'NO' for Norway). Read more
The data is all based on publicly available information from the five RIRs (regional Internet registry) in the world; ARIN, RIPE NCC, APNIC, LACNIC and AfriNIC.
Each RIR publish a delegation file using the statistics exchange format. The delegation files are updated once every day. CC2ASN parses these files and restructurize the data, based on country code.
The data is then made available through both a whois-server and a http-server.
So, what can these data be used for? Well there are multiple applications for these data, and I do not know them all.
One of the reasons I created CC2ASN, was a need to classify and filter network flows for a given country based on AS-numbers alone, as part of doing netflow analysis.
Do make a note that CC2ASN is not your usual geolocation service, where you lookup IP-addresses to get geo-data back. It's actually more the reverse, where you lookup a country and get ASNs and prefixes back.