The trusted source for
IP address data
Look up any IP address, ASN, or domain — powered by data from all 5 Regional Internet Registries.
Daily RIR Updates
Global data synced daily directly from RIPE, APNIC, ARIN, LACNIC, and AFRINIC.
IPv4 & IPv6 Support
Full native support for dual-stack lookup and analysis on all networking tools.
Easy Integration
Modern REST API with structured JSON output. Zero-config integration for developers.
No Paid Plans
IP-FD is 100% free. No hidden fees, no subscriptions, and no premium gates.
Generous Limits
100 req/min (Anonymous)
500 req/min (With API Key)
BGP & Peering
Live ASN data including announced prefixes, upstreams, and peering relations.
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DNS Preference
IPv6‑only: —
Dual‑stack: —
Networking Tools
Professional-grade tools for network analysis
DNS Checker
Look up DNS records for any domain
SPF Checker
Validate SPF records
MX Checker
Check mail server records
DMARC Checker
Validate DMARC policy
What's My IP
See your public IP info
Subnet Calculator
Calculate IPv4/IPv6 subnets
Blacklist Checker
Check IP against DNSBL lists
Server Info
Detect website technology
User Agent
Identify your browser info
ASN Lookup
Look up Autonomous System info
SSL Checker
Inspect SSL certificates
Password Generator
Generate secure passwords