C99.nl alternatives
6 tools in the catalogue cover the same ground as C99.nl and can replace it depending on the need. Each one is reachable, re-checked daily, and listed with its pricing.
- AltDNS (T)freePermutation-based DNS tool that generates and resolves alternative subdomains from known names.
- Aquatone (T)freeGo-based tool for domain reconnaissance that automates subdomain discovery, HTTP service scanning, screenshot capture, and visual HTML report generation for attack surface analysis.
- Bluto (T)freeRecon utility for domain intelligence including DNS records, email patterns, and infrastructure clues.
- DNS Recon (T)freePython-based DNS enumeration script supporting zone transfers, standard record enumeration, TLD expansion, DNS brute force, and PTR lookups.
- dnspop (T)freeDNS reconnaissance utility for enumerating records and identifying domain-related infrastructure.
- Fierce Domain Scanner (T)freeDNS reconnaissance tool focused on subdomain discovery and non-contiguous IP space mapping.
C99.nl
Domain Name
Also written C99
Multi-purpose web-based recon toolset covering subdomain finder, reverse IP, whois, phone lookup, port scanner, malware scanner and more — 20+ tools in one.
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Quick all-in-one domain and IP reconnaissance without installing tools
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