asnmap

Map autonomous system numbers and IP ranges

TLDR

Lookup ASN for IP

$ asnmap -ip [8.8.8.8]

Lookup domain

$ asnmap -d [google.com]

Lookup by ASN number

$ asnmap -a [AS15169]

Lookup by organization

$ asnmap -org "[Google LLC]"

Output CIDR ranges

$ asnmap -a [AS15169] -json

SYNOPSIS

asnmap [-ip ip] [-d domain] [-a asn] [-org name] [options]

asnmap quickly maps ASN (Autonomous System Number) information. It can lookup ASN from IP addresses, domains, or organization names, and return associated IP ranges.
This is useful for reconnaissance, network mapping, and understanding organizational IP allocations.

PARAMETERS

-ip address

Lookup ASN for IP address

-d domain

Lookup ASN for domain

-a asn

Get IP ranges for ASN

-org name

Search by organization name

-json

JSON output

-silent

Silent mode

-o file

Output file

CAVEATS

Data comes from public sources and may not be current. Some organizations have multiple ASNs. Results should be verified for security work.

HISTORY

asnmap was developed by ProjectDiscovery as part of their security reconnaissance toolkit.