Professional DNS lookup tool for checking A, AAAA, MX, CNAME, TXT, NS records and troubleshooting domain issues. Real-time DNS resolution with detailed record information.
✅ Real DNS Lookups: This tool performs actual DNS queries using DNS-over-HTTPS to Cloudflare, Google, and Quad9 DNS servers. Results are live and current.
Type the domain name you want to check into the input field. You can enter any domain without the protocol (e.g., "example.com" instead of "https://example.com"). The tool accepts international domains and subdomains.
Choose the specific DNS record type you want to query, or select "ALL" for comprehensive lookup. A records show IPv4 addresses, AAAA for IPv6, MX for email servers, CNAME for aliases, TXT for verification data, and NS for name servers.
Click "Lookup DNS" to query multiple DNS servers and retrieve the requested records. The tool will display all found records with their values, TTL (Time To Live), and additional information.
Review the returned DNS records for proper configuration. Check TTL values for caching behavior, verify IP addresses are correct, ensure MX records point to valid mail servers, and confirm all necessary records are present.
DNS lookup is the process of querying Domain Name System servers to resolve domain names into IP addresses and retrieve various DNS records. It's essential for website functionality, email delivery, domain verification, and troubleshooting connectivity issues. DNS acts as the internet's phone book, translating human-readable domain names into machine-readable IP addresses.
A Records: Map domain names to IPv4 addresses (32-bit). Essential for website hosting and the most common record type.
AAAA Records: Map domain names to IPv6 addresses (128-bit). Important for modern internet infrastructure and future-proofing.
MX Records: Specify mail exchange servers responsible for receiving email for the domain. Include priority values for backup servers.
CNAME Records: Create aliases pointing one domain name to another. Useful for subdomains and CDN configurations.
TXT Records: Store arbitrary text data, commonly used for domain verification, SPF, DKIM, and DMARC email security.
NS Records: Specify authoritative name servers for the domain. Critical for DNS delegation and zone management.
DNS propagation is the time required for DNS changes to spread across all DNS servers worldwide. TTL (Time To Live) values control how long DNS records are cached by resolvers. Lower TTL values mean faster propagation but increased DNS queries. Higher TTL values reduce server load but slow down updates. Typical propagation times range from minutes to 48 hours.
DNS problems can cause websites to be unreachable or email delivery failures. Common issues include missing A records, incorrect MX record priorities, expired domains, DNS server outages, and propagation delays. Use DNS lookup tools to verify record configurations, check multiple DNS servers, and monitor propagation status after making changes.
Implement DNS security measures including DNSSEC for cryptographic validation, regular monitoring of DNS records for unauthorized changes, using reputable DNS hosting providers, setting appropriate TTL values, and maintaining backup DNS servers. Monitor for DNS hijacking attempts and configure proper SPF, DKIM, and DMARC records for email security.
DNS lookup is the process of querying DNS servers to resolve domain names into IP addresses and retrieve DNS records. It's essential for domain functionality, email delivery, website hosting, and troubleshooting connectivity issues. Without proper DNS records, websites won't load and emails won't be delivered.
A records point domains to IPv4 addresses, AAAA records to IPv6 addresses, MX records handle email routing with priority levels, CNAME records create domain aliases, TXT records store text data for verification and security, and NS records specify authoritative name servers for domain delegation.
Check DNS records with lookup tools like ours, verify nameserver configuration is correct, test DNS resolution from multiple locations, check TTL values for caching issues, flush local DNS cache, ensure DNS propagation is complete after changes, and verify domain isn't expired or suspended.
DNS propagation is the time it takes for DNS changes to spread across all DNS servers worldwide. It typically takes 4-48 hours, depending on TTL values and DNS server caching policies. Lower TTL values speed up propagation but increase query load on DNS servers.
TTL (Time To Live) values determine how long DNS records are cached by resolvers. Higher TTL reduces DNS queries but slows updates. Lower TTL enables faster changes but increases server load. Common values: 300 seconds for frequently changing records, 3600 seconds for stable records, 86400 seconds for rarely changing records.
DNS lookup failures occur due to misconfigured nameservers, expired domains, DNS server outages, network connectivity issues, firewall blocking DNS ports (53), incorrect DNS records, or domain suspension. Check domain status, verify nameserver configuration, and test from multiple DNS resolvers.
Check MX records for mail server configuration with priority values. Verify SPF records in TXT format for sender authorization. Confirm DKIM records for email authentication. Check DMARC policy in TXT records for email security. Use DNS lookup tools to verify all email-related records are properly configured.
Authoritative DNS servers contain the original DNS records for domains and provide definitive answers. Recursive DNS servers query authoritative servers on behalf of clients and cache responses. Our tool uses recursive resolvers to query authoritative servers for the most current DNS information.
Use DNS lookup tools from different geographic locations, check multiple DNS resolvers (Google, Cloudflare, OpenDNS), verify records show new values consistently, wait for TTL period to expire, and test from different networks. Full propagation occurs when all resolvers return updated records.