Free network lookup tools for developers, IT admins, and security professionals. No account needed.
Look up any IP address to find its geographic location, ISP, organization, and network details.
Query DNS records for any domain including A, AAAA, MX, TXT, CNAME, NS, and more.
Check SPF, DKIM, and DMARC records to diagnose email delivery issues.
Check if an IP address is listed on major spam and security blacklists.