DNS Tools Share Tweet DNS Tools A curated collection of free DNS utilities for webmasters, developers and sysadmins. Quickly inspect DNS records, validate SPF/DMARC/DKIM, check propagation and diagnose DNS issues to keep your domain healthy and deliverable. DNS Tools list SPF Record Checker Lookup and validate SPF records to prevent email spoofing and improve deliverability. DNSSPF · Email Domain DNS Validation Automatic checks for missing or misconfigured DNS records and common errors. AuditRecords · Errors Reverse IP Lookup Resolve IP addresses to hostnames — useful for identifying shared hosting. NetworkIP · Hosts DNS Lookup Retrieve A, AAAA, CNAME, MX, NS, TXT and other DNS records for any domain. LookupAll records CNAME Lookup View CNAME chains and canonical hostnames for a given entry. DNSCNAME NS Lookup Display authoritative nameservers and delegation for the domain. DNSNameservers MX Lookup See mail exchange records and priorities to diagnose email routing. EmailMail servers WhatsMyDNS Check DNS propagation across multiple global resolvers to verify updates. PropagationGlobal DMARC Validation Tool Validate DMARC records and check for correct policies and syntax. EmailDMARC Domain DNS Health Checker Quick health report covering DNS, DNSSEC hints and basic SSL observations. AuditHealth DMARC Record Generator Create DMARC records with recommended options and easy copy-to-DNS support. GeneratorDMARC DNSKEY Lookup Inspect DNSSEC keys and signatures (DNSKEY) to verify domain signing. DNSSECSecurity DS Lookup Lookup DS records used for DNSSEC delegation verification. DNSSECDS DKIM Checker Validate DKIM selectors and public keys to protect mail integrity. EmailDKIM
