Core Features
DNS Checker provides professional-grade DNS querying and comparison tools.Multi-Resolver Queries
Query multiple DNS resolvers simultaneously:Parallel Queries: - Check all resolvers at once - Compare results
side-by-side - Identify discrepancies quickly - Save time with batch queries
Supported Resolvers: - Google Public DNS - Cloudflare DNS - OpenDNS -
Quad9 - And many more…
Comprehensive Record Types
Support for all major DNS record types:- Basic Records
- Email Records
- Security Records
Essential DNS Records - A: IPv4 addresses - AAAA: IPv6 addresses
- CNAME: Canonical names - MX: Mail exchange servers - NS: Nameservers - TXT: Text records
Results Display
Clear Formatting
Clear Formatting
- Organized by resolver - Color-coded results - Easy-to-read layout - Copyable values
Comparison View
Comparison View
- Side-by-side comparison - Highlight differences - Identify propagation status - Spot configuration errors
Raw Data Access
Raw Data Access
- View full DNS responses - Access TTL values - See response times - Export results
DNS Propagation Checking
Global Verification Check if DNS changes have propagated worldwide.
TTL Monitoring View Time-To-Live values to estimate propagation.
Real-Time Updates Re-query to see updated DNS records instantly.
Discrepancy Detection Automatically identify inconsistent records across
resolvers.
User Interface
DNS Checker features a clean, professional interface optimized for technical
users.
- Dark Mode: Easy on the eyes with Slate color scheme
- Responsive Design: Works on all devices
- Fast Loading: Optimized performance
- Clean Layout: Focused on DNS results without clutter
Query Options
1
Enter Domain
Type the domain name you want to query
2
Select Record Type
Choose from A, AAAA, MX, CNAME, TXT, NS, SOA, and more
3
Choose Resolvers
Select specific resolvers or query all at once
4
Get Results
View results from all resolvers in a clean, organized format
Advanced Features
DNS Over HTTPS (DoH): - Secure DNS queries - Encrypted communication -
Privacy-focused - Modern protocol support
Query Customization: - Custom DNS resolvers - Timeout configuration -
Query flags - Response filtering
Performance
Fast Queries Results in 1-3 seconds typically
Parallel Execution All resolvers queried simultaneously
Optimized Minimal resource usage
Troubleshooting Tools
Perfect for diagnosing DNS issues:Propagation Verification
Propagation Verification
Check if your DNS changes have propagated: - Compare results across resolvers
- Identify which servers have updated - Estimate time to full propagation - Verify consistency
Configuration Validation
Configuration Validation
Verify DNS configuration: - Check MX records for email - Validate
SPF/DKIM/DMARC - Verify nameserver setup - Test CDN DNS configuration
Debug Connectivity
Debug Connectivity
Troubleshoot domain issues: - Verify A/AAAA records exist - Check for DNS
resolution failures - Identify misconfigured records - Compare expected vs
actual values
Use Case Examples
For Developers: - Verify website DNS after deployment - Check SSL
certificate CAA records - Debug API endpoint DNS - Validate subdomain
configuration
For Admins: - Monitor email server MX records - Verify nameserver
delegation - Check DNSSEC configuration - Audit DNS infrastructure
Privacy & Security
Secure & Private - No logging of queries - HTTPS-only interface -
DNS-over-HTTPS queries - No data collection
Benefits
Save Time: - Query all resolvers at once - Get instant results - No
manual checking
Accurate Results: - Direct resolver queries - Real-time data - No
caching issues
Easy Debugging: - Clear result display - Comparison view - Discrepancy
highlighting