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Network
Map an organization's network ranges from ASN data.
overview
asnmap opens infrastructure mapping: resolve a company, ASN, domain, or IP to the CIDR blocks that autonomous system owns before any host expansion.
Use it when DNS alone understates scope and you need the address space behind a name or a single observed IP.
Trickest provides asnmap as a managed Network node. Feed -org, -asn, -domain, -ip, or -file; take FILE and FOLDER ranges into mapcidr, then a port scanner.
use cases
Look up a company by name or ASN to get every CIDR it owns, then treat those ranges as the in-scope boundary for the rest of the engagement.
Resolve a domain to its ASN and ranges to find broader infrastructure behind a single site, including siblings that share the same address space.
Emit -json ranges and hand them to mapcidr and a port scanner so probing runs against owned IP space, not only published hostnames.
Pass -file with organizations, ASNs, or domains to map many footprints in one run and write the combined ranges for downstream nodes.
reference
| Name | Type | Flag | Description |
|---|---|---|---|
| org | STRING | -org | Target organization to look up (e.g. EXAMPLE). |
| asn | STRING | -asn | Target ASN to look up (e.g. AS64500). |
| domain | STRING | -domain | Target domain to look up (e.g. example.com). |
| ip | STRING | -ip | Target IP to look up (e.g. 198.51.100.10). |
| file | FILE | -file | File of targets to look up in bulk. |
| json | BOOLEAN | -json | Display output in JSON format. |
| csv | BOOLEAN | -csv | Display output in CSV format. |
| v6 | BOOLEAN | -v6 | Include IPv6 CIDR ranges in the output. |
Showing key inputs. asnmap exposes 15 inputs in total.
| Name | Type | Flag | Description |
|---|---|---|---|
| org | STRING | -org | target organization to look up (e.g. EXAMPLE) |
| asn | STRING | -asn | target ASN to look up (e.g. AS64500) |
| domain | STRING | -domain | target domain to look up (e.g. example.com) |
| ip | STRING | -ip | target IP to look up (e.g. 198.51.100.10) |
| file | FILE | -file | file of targets to look up in bulk |
| json | BOOLEAN | -json | display output in JSON format |
| csv | BOOLEAN | -csv | display output in CSV format |
| v6 | BOOLEAN | -v6 | display IPv6 CIDR ranges in the output |
| silent | BOOLEAN | -silent | display silent output, ranges only with no banner |
| verbose | BOOLEAN | -verbose | display verbose output |
| proxy | STRING | -proxy | list of proxies to use (comma separated) |
| proxy-file | FILE | -proxy | file containing a list of proxies to use |
| resolvers | FILE | -resolvers | file with a list of resolvers to use |
| config | FILE | -config | asnmap configuration file |
| disable-update-check | BOOLEAN | -disable-update-check | disable the automatic asnmap update check |
example
# map every CIDR range an organization ownsasnmap -org EXAMPLE -silent192.0.2.0/25192.0.2.128/25198.51.100.0/25198.51.100.128/25203.0.113.0/25203.0.113.128/26203.0.113.192/26guidance
Use asnmap when you need owned CIDR ranges from a company, ASN, domain, or IP before scanning. It maps address space only; follow with mapcidr and a port scanner. Prefer get-asn-prefixes when you already hold the AS number.
Expands and slices CIDR ranges. Run after asnmap to turn ranges into host lists.
Broader org intelligence including ASNs from passive OSINT. asnmap stays a focused ASN-to-CIDR lookup.
Pulls prefixes for an ASN. Prefer this lighter sibling when you already have the AS number.
faq
related
Validate public DNS resolvers against trusted baselines.
Parallel ICMP echo sweeps for CIDR ranges and host files.
Probe a domain list for working HTTP and HTTPS servers.
A fast and multi-purpose HTTP toolkit that runs multiple probers with reliable, high-throughput results.
Expand, aggregate, and slice CIDR ranges into host lists.
Asynchronous SYN port scanner for wide IP ranges; bound runs with --rate and --excludefile.
An organization name feeds asnmap, which maps its CIDR ranges and passes them to mapcidr, expanding them into a host-range output for scanning.
Facts on this page come from the live Trickest tool library.