DNS Explorer 3.0 brings a complete rebuild with native code, new octopus logo, enhanced DNS lookups with geolocation data, subdomain deep search, and improved reverse DNS with port scanning.
Learn how to analyze and optimize SPF records to stay under the 10 DNS lookup limit. Use our free SPF analyzer to prevent PermError and improve email deliverability.
Learn what an A record is in DNS, how it maps domain names to IPv4 addresses, and how A records are used to direct web traffic and host services online.
Learn what an AAAA record is in DNS, how it maps domain names to IPv6 addresses, and how it enables modern internet connectivity for dual-stack and IPv6-only devices.
Learn how CAA records in DNS work to control which Certificate Authorities can issue SSL/TLS certificates for your domain, improving security and preventing unauthorized issuance.