All Tools
Every look up available on ServerRecords, each on its own page with an explanation of what it does, why it matters, and real-world examples — plus the look up itself, ready to run.
Overview
- All DNS Records Look UpLook up every DNS record type for a domain at once — A, AAAA, MX, TXT, CNAME, NS, SOA, CAA, SRV — plus SPF, DMARC and WHOIS, with plain explanations.
- Email Health CheckOne combined look up of everything that affects a domain's email deliverability: MX, SPF, DMARC, MTA-STS and TLSRPT.
- Domain Health CheckOne combined look up of a domain's overall state: all DNS records, WHOIS registration, HTTPS connectivity and security headers.
DNS Records
- A Record Look UpLook up a domain's A record — the IPv4 address it resolves to — with a plain explanation of what it means.
- AAAA Record Look UpLook up a domain's AAAA record — its IPv6 address — with a plain explanation of what it means.
- MX Record Look UpLook up a domain's MX records to see which mail servers handle its incoming email, in priority order.
- TXT Record Look UpLook up all of a domain's TXT records — used for SPF, domain verification, and more — in one place.
- CNAME Record Look UpLook up a domain's CNAME record to see which other hostname it's aliased to.
- NS Record Look UpLook up a domain's NS records to see which nameservers are authoritative for its DNS.
- SOA Record Look UpLook up a domain's SOA record — the administrative metadata for its DNS zone.
- CAA Record Look UpLook up a domain's CAA record to see which certificate authorities are allowed to issue SSL/TLS certificates for it.
- SRV Record Look UpLook up a domain's SRV records, used to locate specific network services like VoIP or chat.
- PTR Record Look Up (Reverse DNS)Perform a reverse DNS look up to find the hostname an IP address maps back to.
- DNSKEY Record Look UpLook up a domain's DNSKEY records — the public keys resolvers use to verify DNSSEC signatures.
- DS Record Look UpLook up a domain's DS record — the parent-zone anchor that links its DNSSEC keys into the chain of trust.
- NSEC Record Look UpLook up a domain's NSEC records — DNSSEC's mechanism for proving a name doesn't exist.
- RRSIG Record Look UpLook up a domain's RRSIG records — the actual DNSSEC signatures covering its record sets.
- CERT Record Look UpLook up a domain's CERT records — an uncommon record type for storing certificates in DNS.
- IPSECKEY Record Look UpLook up a domain's IPSECKEY records — keying material for opportunistic IPsec tunnels.
- LOC Record Look UpLook up a domain's LOC record — an informational record publishing geographic coordinates in DNS.
- DNSSEC Status Look UpCheck whether a domain is DNSSEC-signed, anchored to the chain of trust, and actually validating.
Email Authentication
- SPF Record Look UpLook up a domain's SPF record and see, in plain language, which mail servers it authorizes to send email.
- DKIM Record Look UpLook up a domain's DKIM record for a given selector, and see whether it publishes a valid public signing key.
- DMARC Record Look UpLook up a domain's DMARC policy and see, in plain language, what it tells mail servers to do with mail that fails authentication.
- BIMI Record Look UpLook up a domain's BIMI record and see whether it publishes a brand logo for authenticated email.
- MTA-STS Look UpLook up a domain's MTA-STS record and policy file to see whether inbound mail is required to use encrypted, authenticated delivery.
- TLSRPT Look UpLook up a domain's TLSRPT record to see where SMTP TLS delivery failure reports are sent.
- SMTP Server TestConnect to a domain's primary mail server and check its greeting, EHLO response, and STARTTLS support.
Security
- HSTS Look UpCheck whether a domain's website sends the HTTP Strict Transport Security header, and for how long.
- HTTP/HTTPS Look UpCheck whether a domain's website responds over HTTPS and whether plain HTTP correctly redirects to it.
- llms.txt Look UpCheck whether a domain publishes an llms.txt file summarizing its content for AI tools and crawlers.
- Blacklist Look UpLook up whether a domain's mail server IP address is listed on major email blacklists (DNSBLs).
Domain Info
Tools
- Password GeneratorGenerate a strong, random password in your browser — length, character sets, and ambiguous-character exclusion are all configurable.
- SPF Record GeneratorBuild a valid SPF TXT record from a list of authorized mail sources, without memorizing the syntax.
- DMARC Record GeneratorBuild a valid DMARC TXT record with your chosen policy, alignment mode, and reporting addresses.
- SPF FlatteningResolve a domain's SPF includes, a, and mx mechanisms down to raw IP addresses to help stay under the 10-lookup limit.
- CT Subdomain ResolverDiscover a domain's subdomains from public Certificate Transparency logs and resolve each to its IP addresses — for building router allowlists when wildcard matching isn't supported.
- Mail Header AnalyzerPaste the raw headers of an email you received and get each field analyzed — SPF/DKIM/DMARC results, the delivery path with per-hop delays, and sender consistency checks.