Reverse IP, ASN & Subnet CIDR Footprinter

Analyze IPv4 subnets, BGP routes, CIDR masks, usable host capacities, and BGP/ASN registry pivots.

Deconstruct any IPv4 address or CIDR notation into network addresses, broadcast boundaries, wildcard masks, usable host ranges, and binary bit allocations. Pivot directly into Hurricane Electric BGP, Shodan host recon, Censys, and ViewDNS to identify co-hosted domains.

Features

• Full CIDR bitmask & binary calculation
• Private vs Public RFC 1918 scope detection
• Usable host capacity & boundary mapping
• Direct BGP & threat intelligence pivots

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