Domain Tools

Domain Age Checker

Find out how old a domain is using WHOIS data.

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Domain Hosting Checker

Find the hosting provider and nameservers for any domain.

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MX Record Lookup

An MX, or Mail Exchanger, record tells the internet which servers are responsible for accepting email for a domain. When someone sends a mes...

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NS Record Lookup

NS, or Name Server, records identify the authoritative DNS servers for a domain. When any resolver wants to look up a record for example.com...

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TXT Record Lookup

TXT records hold arbitrary text strings attached to a domain. Originally meant for human-readable notes, they now carry critical machine-rea...

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CAA Record Lookup

A CAA, or Certification Authority Authorization, record lists which certificate authorities are allowed to issue SSL or TLS certificates for...

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SOA Record Lookup

SOA stands for Start of Authority. Every DNS zone has exactly one SOA record, which holds metadata about the zone itself rather than any hos...

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SPF Checker

SPF, the Sender Policy Framework, lets a domain publish a list of servers authorized to send mail on its behalf. Receiving servers read the...

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DMARC Checker

DMARC, or Domain-based Message Authentication, Reporting, and Conformance, builds on SPF and DKIM to tell receivers what to do when a messag...

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DKIM Checker

DKIM, or DomainKeys Identified Mail, lets a sending server cryptographically sign outgoing messages with a private key. The matching public...

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DNS Propagation Checker

DNS propagation is the period during which a record change at the authoritative name servers spreads to resolvers around the world. Each res...

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DNSSEC Checker

DNSSEC, the Domain Name System Security Extensions, adds cryptographic signatures to DNS responses so resolvers can verify the data was not...

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HSTS Checker

HSTS, or HTTP Strict Transport Security, is a response header that tells browsers to only ever connect to a site over HTTPS. Once a browser...

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Punycode Converter

Punycode is an encoding that represents Unicode characters using only the ASCII letters, digits, and hyphens that DNS supports. It allows in...

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Subdomain Finder

The tool queries Certificate Transparency logs, which are public, append-only ledgers of every TLS certificate issued by participating CAs....

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Domain Availability

The tool queries the registry's WHOIS or RDAP service for the domain. If the response indicates "no match" or "not found", the name is avail...

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DNSBL Checker

A DNSBL, or DNS-based Blocklist, is a list of IP addresses or domains known for sending spam, hosting malware, or other abusive behavior. Ma...

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Cloudflare Detector

It checks several signals: nameservers ending in .ns.cloudflare.com, the resolved IP falling inside published Cloudflare ranges, specific HT...

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Typo-squatting Detector

Generate common typo and TLD variants of a domain, then check which are actually registered. Brand-protection use case.

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