Subdomain Finder

Subdomain Finder - Discover Subdomains via CT Logs

logiover/subdomain-finder

Discover every subdomain of any domain using Certificate Transparency logs (crt.sh). Fast bulk subdomain enumeration for security recon, attack-surface mapping, asset discovery and SEO. No API key — export to CSV or JSON.

Subdomain Finder: Certificate Transparency

glitchbound/subdomain-scraper

Enumerate every subdomain of a domain from public Certificate Transparency logs. No brute-force wordlist and no DNS hammering, because every TLS certificate is logged, so the hosts are already public record. Deduplicated to one row per hostname, with first seen, issuing CA and current validity.

Subdomain Finder

happitap/subdomain-finder

Subdomain Finder is a high-speed intelligence tool that uncovers subdomains for any target domain using Certificate Transparency (CT) logs. Unlike traditional brute-force tools, it requires no heavy traffic and provides results in seconds.

Real Subdomain Finder

onescales/real-subdomain-finder

Discover every subdomain for any domain. Queries 40+ OSINT sources including cert transparency, DNS archives & web scanners. Results enriched with DNS validation, HTTP probing, and subdomain takeover detection. Simple Subdomain Lookup that works!

Subdomain Finder - Discover Every Subdomain Of A Domain

thirdwatch/subdomain-finder

Discover every subdomain for any apex domain. Merges 4 sources: certificate transparency (crt.sh), HackerTarget, RapidDNS, plus DNS bruteforcing of common names. Verifies each is live via DNS + HTTP probe.

Find all the subdomains of any website and check its SSL certificates. Paste a domain and get every subdomain seen in public certificate records, plus the certificate issuer, valid dates and days until expiry. Great for security checks and finding forgotten sites. No API key needed.

Subdomain Finder - CT Log Enumeration + Live DNS Check

eliai/subdomain-finder

Enumerate a domain's subdomains from Certificate Transparency logs, with an optional live DNS resolve. All subdomains in one record. $0.005 per domain (not per subdomain), far cheaper than paid finders; failures are free.

Subdomain Discovery API

crawland/subdomain-discovery-api

Paginated subdomain enumeration for any registered domain — DNS records, registrar, WHOIS, vendor reputation, and category labels per subdomain, served from the Crawland threat-intelligence backend.

Subdomain Finder — Certificate Transparency (crt.sh)

bgfc97/crtsh-subdomain-finder

Discover subdomains of any domain from public Certificate Transparency logs (crt.sh). Attack-surface mapping and recon with first/last-seen dates. No key, no proxy.

Certificate Transparency Scraper: Subdomain Discovery

arman-bd/certificate-transparency-scraper

Query certificate transparency logs via crt.sh to enumerate subdomains, issuers, validity windows and certificate history for any domain. Passive attack-surface discovery. no login, no proxy, no browser.