DNS Lookup

Query domain DNS records including A, AAAA, CNAME, MX, NS, TXT, etc.

Common Use Cases

  • Troubleshoot website access issues by checking DNS resolution
  • Verify DNS records after domain migration to confirm propagation
  • Check email server configuration by viewing MX records
  • Verify CDN setup by examining CNAME records
  • Confirm domain ownership through TXT record verification

DNS Record Types Explained

  • A：A record: Maps domain to an IPv4 address
  • AAAA：AAAA record: Maps domain to an IPv6 address
  • CNAME：CNAME record: Maps domain to another domain (alias)
  • MX：MX record: Mail exchange record for email routing
  • NS：NS record: Nameserver record specifying DNS servers
  • TXT：TXT record: Text record, commonly used for SPF, DKIM verification

Frequently Asked Questions

What's the difference between DNS lookup and Ping?

DNS lookup converts a domain name to an IP address, while Ping tests network connectivity. DNS results show which IP a domain resolves to; Ping measures latency to that IP.

What does the TTL value mean?

TTL (Time To Live) indicates how long (in seconds) a DNS record is cached. Lower TTL means faster propagation of DNS changes; higher TTL improves query efficiency. Common values are 300-3600 seconds.

Why can't I find some DNS records?

Some records may have high TTL causing caching, or the domain simply doesn't have certain record types configured. Additionally, some DNS providers may not support all record types.

How DNS Works

DNS (Domain Name System) is the phonebook of the internet. When you type a URL in your browser, DNS servers convert human-readable domain names (like example.com) into machine-readable IP addresses (like 93.184.216.34).

The global DNS system uses a hierarchical structure, from root servers to top-level domain servers (like .com, .cn), then to authoritative nameservers. Each DNS query traverses this hierarchy to find the correct IP address.