ASN (Autonomous System Number)
An Autonomous System Number identifies a collection of IP address ranges under the control of a single organization (an Internet Service Provider, cloud provider, or enterprise). ASNs are used in threat intelligence to identify hosting providers commonly used by attackers.
Frequently Asked Questions
What is ASN (Autonomous System Number)?
An Autonomous System Number identifies a collection of IP address ranges under the control of a single organization (an Internet Service Provider, cloud provider, or enterprise). ASNs are used in threat intelligence to identify hosting providers commonly used by attackers.
How is ASN (Autonomous System Number) related to IP Reputation?
ASN (Autonomous System Number) and IP Reputation are both key concepts in threat intelligence. IP reputation is a score or classification indicating whether an IP address has been associated with malicious activity. Factors include appearance on blocklists, volume of spam sent, history of port scanning, C2 hosting, and abuse reports.
Related Terms
IP Reputation
IP reputation is a score or classification indicating whether an IP address has been associated with malicious activity. Factors include appearance on blocklists, volume of spam sent, history of port scanning, C2 hosting, and abuse reports.
Blocklist (Denylist)
A blocklist is a list of IPs, domains, URLs, or file hashes known to be malicious. Firewalls, DNS resolvers, and email gateways use blocklists to automatically block traffic from known bad actors. Blocklists must be kept current to remain effective.
Put this intelligence to work
Query indexed indicators — IPs, domains, URLs, and hashes — in seconds.