DNS Security Lookup Online Free
Lookup and validate DNS records critical to domain and email security. Run queries for SPF, DMARC, DKIM selectors, MX, AAAA, and TXT records to protect against spoofing.
DNS Security Lookup
Check DNS security records including SPF, DMARC, DKIM, MX, TXT and related domain settings.
How to Use This Tool
Enter Domain
Type your domain name (e.g. company.com) into the lookup search box.
Select DNS Records
Choose target records (e.g., SPF, DMARC, MX, or all security records).
Run DNS Query
Click the query button to fetch current DNS configurations.
Check Alignment Status
Analyze the fetched record output to identify configuration errors or missing authentication entries.
Validating email spoofing protection
You want to confirm if your domain has email protection enabled. Input the domain and view the DMARC record status. If the tool reports 'No DMARC record found at _dmarc.yourdomain.com', you need to generate and publish a DMARC policy.
Common Use Cases
Email Compliance
Ensure your domain complies with Google and Yahoo sender guidelines by validating SPF and DMARC settings.
Domain Security
Identify DNS records that could allow attackers to spoof company emails in phishing campaigns.
DevOps & SREs
Audit newly configured DNS servers during registrar migrations.
Academic Learning
Understand how SPF mechanism blocks, DMARC reporting nodes, and DKIM public key files are organized.