HackerTarget IP Tools API
FreemiumLiveLast verified 29 Sept 2026
ASN, DNS, reverse DNS/IP, WHOIS, GeoIP, HTTP header and subnet lookups for any IP or domain as plain text.
Example request
curl -s 'https://api.hackertarget.com/aslookup/?q=AS15169'
Free tier, in plain English
Free without a key for 50 calls a day per IP. Memberships raise that to 500–2,000 a day, and extra credits can be bought.
Alternatives in WHOIS & DNS
DigMyNameChecks domain availability and compares registrar prices across 50+ TLDs, no key required.FreeDomain IntelligenceWHOIS/RDAP, DNS, SSL certificate, subdomain and SPF/DMARC/DKIM data for a domain in one call.FreemiumDomainr (Fastly)Domain name suggestions and registration status (available, parked, premium, for sale) across TLDs.DomScanDomain, DNS, WHOIS/RDAP, TLS, typosquatting and brand-monitoring lookups across 1,100+ TLDs.FreemiumHost.ioDNS records, backlinks, IP/ASN and related-domain data across 600M+ registered domains.Freemium
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