DNS Lookup Tool
Resolve domain names to IP addresses, explore DNS records, and troubleshoot domain configurations. DNS (Domain Name System) is the foundation of how the internet translates human-readable names into machine-readable IP addresses.
A DNS lookup translates a domain name (like google.com) into an IP address, enabling your browser and applications to locate servers on the internet. DNS lookups are essential for troubleshooting network issues and verifying domain configurations.
Most Visited Websites
Here are some of the most visited domains on the internet. Click any to perform a DNS lookup:
google.com youtube.com facebook.com baidu.com wikipedia.org yahoo.com amazon.com twitter.com instagram.com linkedin.com gmail.com quora.com stackoverflow.com chatgpt.com x.com microsoft.com reddit.com netflix.com weather.com pinterest.com github.com apple.com zoom.com analytics.google.com wordpress.com yahoo.co.jp yandex.ru whatsapp.com office.com bing.com live.com craigslist.org bestbuy.com samsung.com nytimes.com deepseek.com zoom.us
Common DNS Record Types
DNS records store information about domain names and their associated services. Here are the most common types:
- A Record
- Maps a domain name to an IPv4 address (e.g., google.com → 142.250.185.46)
- AAAA Record
- Maps a domain name to an IPv6 address (128-bit addresses)
- CNAME Record
- Creates an alias for another domain name (canonical name)
- MX Record
- Specifies mail servers responsible for receiving email for a domain
- TXT Record
- Stores arbitrary text, often used for verification (SPF, DKIM, DMARC)
- NS Record
- Specifies authoritative name servers for a domain
- PTR Record
- Performs reverse DNS lookups (IP address to domain)
- SOA Record
- Contains zone information and DNS server details
- SRV Record
- Specifies location of specific services on the network
- CAA Record
- Specifies which Certificate Authorities can issue certificates
DNS Fundamentals
Key concepts and features that make DNS work:
Hierarchical & Distributed
DNS uses a hierarchical system with root servers, top-level domains (TLDs), and authoritative servers working together to resolve names globally.
Caching
DNS records are cached at multiple levels (recursive resolvers, ISPs, local systems) to improve performance and reduce server load.
TTL (Time To Live)
Determines how long DNS records remain cached before being refreshed. Shorter TTLs mean faster updates, longer TTLs mean better performance.
Load Balancing
DNS can distribute traffic across multiple servers by returning different IP addresses for the same domain to balance server loads.
Failover
DNS automatically redirects traffic to backup services when primary services fail, providing high availability and redundancy.
DNSSEC
Domain Name System Security Extensions adds cryptographic signatures to DNS queries, preventing spoofing and man-in-the-middle attacks.
CDN Integration
DNS helps content delivery networks intelligently route users to the nearest server, reducing latency and improving content delivery speeds.
Email Routing
DNS MX records are essential for email delivery, directing mail to the correct mail servers based on domain configuration.
DNS History Timeline
DNS invented by Paul Mockapetris
First DNS root server created
First domain registered (symbolics.com)
1.5+ billion websites on the internet