DNS Lookup Tool
Resolve domain names to IP addresses and fetch DNS records (A, AAAA, MX, TXT, CNAME, etc.). Perfect for network diagnostics, domain analysis, and troubleshooting DNS issues.
Popular Domains
DNS Record Types Guide
Creates alias pointing to another domain
Specifies authoritative name servers
Start of Authority record with zone info
Reverse DNS lookup (IP to domain)
DNS Best Practices
✓ Recommendations
- • Use multiple DNS providers for redundancy
- • Set appropriate TTL values (300-3600 seconds)
- • Monitor DNS response times regularly
- • Implement SPF, DKIM, and DMARC records
- • Use CDN with DNS load balancing
- • Keep DNS records up to date
- • Use meaningful subdomain names
- • Implement DNS security measures
✗ Common Issues
- • Long DNS propagation delays
- • Single point of failure
- • Incorrect MX record priorities
- • Missing A/AAAA records
- • Wildcard DNS misconfigurations
- • Outdated or orphaned records
- • DNS cache poisoning vulnerabilities
- • Lack of monitoring and alerting
DNS Troubleshooting Tips
DNS Resolution Issues
Check if domain resolves to correct IP addresses. Look for missing A or AAAA records, verify TTL settings, and ensure DNS servers are responding properly.
Email Delivery Problems
Verify MX records are properly configured with correct priorities. Check for SPF, DKIM, and DMARC records to prevent email delivery issues.
Website Loading Issues
Ensure A records point to correct server IPs. Check CNAME records for subdomains, verify CDN configuration, and monitor DNS response times.
Propagation Delays
DNS changes can take 24-48 hours to propagate globally. Use lower TTL values before making changes, and test from multiple locations and DNS providers.
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