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What is a DNS lookup?
A DNS (Domain Name System) lookup retrieves the records that control how a domain is configured.
This includes IP addresses, mail servers, name servers, and verification records.
Why TTL matters
TTL (Time To Live) determines how long DNS records are cached by servers and browsers.
Lower TTL values allow faster DNS updates, while higher values improve caching efficiency.
What this tool shows
- A Records (IPv4 addresses)
- AAAA Records (IPv6 addresses)
- MX Records (mail servers)
- NS Records (name servers)
- TXT Records (verification & configuration)
- CNAME Records (aliases)
- TTL values for each record
Common DNS Record Types Explained
- A Record: Points a domain to an IPv4 address.
- AAAA Record: Points a domain to an IPv6 address.
- MX Record: Directs email to mail servers.
- NS Record: Identifies authoritative name servers.
- TXT Record: Used for SPF, DKIM, verification.
- CNAME Record: Alias pointing to another domain.
How DNS Affects Website Performance
DNS performance plays a critical role in website loading speed. Slow DNS resolution can delay initial connection times and impact user experience and Core Web Vitals.
What is DNS Propagation?
DNS propagation refers to the time it takes for DNS changes to update across global servers. This can take minutes to 48 hours depending on TTL values and caching.
Why Use a DNS Lookup Tool?
- Diagnose domain configuration issues
- Verify hosting and server setup
- Check email (MX) configuration
- Confirm DNS propagation changes
- Audit DNS security records
Related Website Tools
- Website Speed Test
- Hosting Provider Checker
- Website Status Checker
- DNS Lookup Tool