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    DNS Lookup Tool

    Query DNS records for any domain with multiple record types

    Enter a domain name and select the DNS record type to query. This tool supports all common DNS record types including A, AAAA, MX, CNAME, TXT, NS, SOA, and more.
    DNS Query
    Enter domain name and select record type to perform DNS lookup
    About This Tool

    This page provides original, human-reviewed information about general DNS lookups across all common record types, explaining answer sections, authoritative responses, and NXDOMAIN results.

    Understanding DNS

    The Domain Name System (DNS) is like the internet's phone book. It translates human-readable domain names (like example.com) into IP addresses that computers use to communicate with each other.

    How DNS Works:

    1

    You enter a domain name in your browser

    2

    Your computer queries DNS servers to find the IP address

    3

    DNS servers return the corresponding IP address

    4

    Your browser connects to the website using the IP address

    Key Concepts:

    TTL (Time To Live)

    How long DNS records are cached before being refreshed

    Name Servers

    Servers that store and serve DNS records for domains

    DNS Records

    Different types of information stored in DNS (A, MX, CNAME, etc.)

    DNS Propagation

    Time it takes for DNS changes to spread across the internet

    Public DNS Servers:

    ProviderPrimary DNSSecondary DNSIPv6 DNS
    114DNS114.114.114.114114.114.115.115-
    DNSPod DNS+119.29.29.29182.254.116.1162402:4e00::
    DNS.SB (Telecom/Mobile)101.226.4.6218.30.118.6-
    DNS.SB (Unicom)123.125.81.6140.207.198.6-
    CNNIC DNS1.2.4.8210.2.4.8-
    Google DNS8.8.8.88.8.4.42001:4860:4860::8888
    Cloudflare DNS1.1.1.11.0.0.12606:4700:4700::1111
    IBM Quad9 DNS9.9.9.9149.112.112.1122620:fe::fe
    DNS.SB185.222.222.222185.184.222.2222a09::
    OpenDNS208.67.222.222208.67.220.2202620:0:ccc::2
    V2EX DNS199.91.73.222178.79.131.110-
    Alibaba Cloud DNS223.5.5.5223.6.6.62400:3200::1
    Tencent Cloud DNS183.60.83.19183.60.82.98-
    Baidu Cloud DNS180.76.76.76-2400:da00::6666
    Microsoft DNS4.2.2.14.2.2.2-
    Huawei Cloud DNS122.112.208.1139.9.23.90-
    ByteDance DNS180.184.1.1180.184.2.2-
    OneDNS117.50.11.1152.80.66.66-
    Chunghwa Telecom DNS168.95.192.1168.95.1.1-
    Hong Kong Broadband DNS203.80.96.10203.80.96.9-
    Norton DNS199.85.126.10199.85.127.10-
    Oracle Dyn DNS216.146.35.35216.146.36.36-
    Credit Suisse DNS64.6.64.664.6.65.6-
    DNS Record Types

    A

    Maps domain names to IPv4 addresses (32-bit)

    AAAA

    Maps domain names to IPv6 addresses (128-bit)

    MX

    Specifies mail servers responsible for receiving email

    CNAME

    Creates an alias from one domain name to another

    TXT

    Stores arbitrary text data, often used for verification

    NS

    Specifies authoritative name servers for the domain

    SOA

    Contains administrative information about the domain

    PTR

    Maps IP addresses back to domain names (reverse DNS)

    SRV

    Specifies location of services (host, port, priority)

    CAA

    Specifies which certificate authorities can issue certificates

    DNSKEY

    Contains public keys for DNSSEC validation

    DS

    Contains hash of child zone's DNSKEY record

    TLSA

    Associates TLS certificates with domain names

    SSHFP

    Contains SSH public key fingerprints

    DNS Troubleshooting

    Common DNS Issues

    • Domain not resolving (NXDOMAIN error)
    • Slow DNS resolution times
    • Incorrect or outdated DNS records
    • DNS propagation delays
    • DNS server timeouts or failures

    Troubleshooting Steps

    • Check if the domain is registered and not expired
    • Verify DNS records are correctly configured
    • Test with different DNS servers (Google, Cloudflare, etc.)
    • Check DNS propagation status globally
    • Clear local DNS cache and try again
    • Use command-line tools like nslookup or dig

    Diagnostic Commands

    nslookup example.com
    dig example.com MX
    ping example.com
    DNS Best Practices

    For Domain Owners:

    • Use multiple name servers for redundancy
    • Set appropriate TTL values (not too high, not too low)
    • Implement DNSSEC for enhanced security
    • Monitor DNS resolution performance regularly
    • Keep DNS records up to date and remove unused ones

    For System Administrators:

    • Use reliable DNS providers with good uptime
    • Implement DNS monitoring and alerting
    • Plan for DNS changes and propagation time
    • Use DNS load balancing for high availability
    • Regularly audit and clean up DNS records

    Security Considerations:

    • Enable DNSSEC to prevent DNS spoofing
    • Use secure DNS providers that support DoH/DoT
    • Monitor for unauthorized DNS changes
    • Implement DNS filtering for malware protection
    • Regularly review and update DNS security policies

    Related Tools

    MX Lookup
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    DMARC Checker
    Check and analyze DMARC records
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    Analyze email headers
    DKIM Checker
    Verify DKIM signatures
    WHOIS Lookup
    Domain registration info
    SMTP Test
    Test SMTP connectivity
    SSL Certificate Lookup
    Check SSL certificates
    DNS Propagation Checker
    Check DNS propagation
    Ping Test
    Test network connectivity
    Traceroute
    Trace network path
    Subnet Calculator
    Calculate IP subnets
    What Is My IP
    Check your IP address

    Need Help?

    Our tools are designed to be intuitive, but if you need assistance, we're here to help.

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    About Our Tools

    Professional-grade email and DNS diagnostic tools trusted by IT professionals worldwide.

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    EmailToolBox is a free suite of email testing, deliverability and domain diagnostics tools. Check your email health, validate SPF/DKIM/DMARC, look up DNS records and monitor blacklist status in seconds - no signup required.

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    DNS Lookup - Free Multi-Type DNS Record Lookup Tool - EmailToolBox