Check DNS records and configurations for any domain
Looking up DNS records...
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Understanding the technology behind our DNS query service
We take the domain name you provide and prepare it for DNS lookup, determining which record types to query based on your selection.
We query authoritative DNS servers to retrieve the requested DNS records, following the DNS resolution process to get accurate results.
We compile and organize the DNS records into an easy-to-read format, categorizing them by record type and providing explanations of their purpose.
Understanding the different types of DNS records and their purposes
Maps a domain name to an IPv4 address. This is the most common record type and is used to point a domain to a web server.
Maps a domain name to an IPv6 address. Similar to an A record but for the newer IPv6 protocol.
Specifies mail servers responsible for accepting email for the domain. Includes a priority value to determine server preference.
Contains text information for various purposes, including domain verification, SPF records for email security, and DKIM keys.
Creates an alias from one domain name to another. Useful for subdomains that should point to the same content as another domain.
Specifies the authoritative name servers for the domain. These servers contain the definitive DNS records for the domain.
Contains administrative information about the zone, including the primary name server, administrator email, and various timers.
Specifies the location of services, including the hostname, port, and priority. Used for services like SIP, XMPP, and others.
Common questions about DNS and DNS lookups
DNS (Domain Name System) is like the internet's phone book, translating human-readable domain names (like example.com) into IP addresses (like 93.184.216.34) that computers use to identify each other. Without DNS, you would need to remember and type numeric IP addresses instead of domain names to access websites and services. DNS is crucial for the functioning of the internet as we know it today.
A DNS lookup can reveal various information about a domain, including:
- IP addresses associated with the domain (A and AAAA records)
- Mail server configurations (MX records)
- Name servers hosting the domain's DNS (NS records)
- Text records for verification and security (TXT records)
- Aliases and redirects (CNAME records)
- Administrative information (SOA records)
This information can be useful for troubleshooting email delivery issues, verifying domain ownership, checking DNS propagation, and understanding a domain's infrastructure.
DNS propagation typically takes anywhere from a few minutes to 48 hours, depending on several factors:
- TTL (Time To Live) values set in your DNS records
- The DNS providers and servers involved
- Internet Service Providers' cache policies
- Your local DNS cache
Lower TTL values (measured in seconds) can speed up propagation, but most changes are visible within 4-8 hours globally. For critical changes, it's best to plan ahead and allow up to 48 hours for complete propagation.
TTL (Time To Live) is a value in DNS records that specifies how long (in seconds) a DNS record should be cached by resolving servers and clients before they should request a fresh copy from the authoritative DNS server. A lower TTL means changes propagate faster but increases DNS query load, while a higher TTL reduces load but slows down propagation of changes.
Common TTL values:
- 300 seconds (5 minutes): For records that might change frequently
- 3600 seconds (1 hour): A balanced approach for most records
- 86400 seconds (24 hours): For stable records that rarely change
Common DNS issues and their solutions include:
Website not resolving:
- Verify A/AAAA records point to the correct IP address
- Check that your domain's NS records are correct
- Ensure your domain registration is active and not expired
Email delivery problems:
- Verify MX records point to your mail servers
- Set up SPF, DKIM, and DMARC records (TXT records)
- Check for blacklisting of your mail server IPs
Slow DNS resolution:
- Use a reliable DNS provider with global presence
- Optimize TTL values appropriately
- Consider using a DNS-based CDN for improved performance