Individual skill
asn-infrastructure-mapping
Map organization IP infrastructure via ASN, CIDR, TLD expansion, and reverse DNS.
recon/asn-infrastructure-mapping/SKILL.md
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- Last checked
- Nov 9, 2026
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- Repository last updated
- Nov 7, 2026
- License
- MIT
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- bug-bounty Repository topic
- cloud-security Repository topic
- firebase-hacking Repository topic
- hermes-agent Repository topic
- jwt-attacks Repository topic
- offensive-security Repository topic
- penetration-testing Repository topic
- reconnaissance Repository topic
- red-team Repository topic
- security-automation Repository topic
- recon Declared skill tag
- asn Declared skill tag
- cidr Declared skill tag
- ip-range Declared skill tag
- tld Declared skill tag
- reverse-dns Declared skill tag
- infrastructure Declared skill tag
- devops Derived category
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# ASN Infrastructure Mapping
Map an organization's entire IP infrastructure by pivoting from domain to ASN (Autonomous System Number), extracting CIDR ranges, and discovering every hostname and service across all owned IP blocks. Includes TLD expansion to find sibling domains on different top-level domains with separate infrastructure.
## When to Use
- You have a target domain and want to discover EVERY IP owned by the organization.
- Passive subdomain enumeration found only a few hosts — the rest may be on sibling TLDs or different IP ranges.
- The target has a known ASN that can be expanded to full CIDR blocks.
- Services on non-standard ports are invisible to web-only recon.
- Acquired subsidiaries or international domains may sit on different ASNs with weaker security.
## Prerequisites
