DNS Lookup: Intelligence & Security Analyzer

What This Tool Checks

Our DNS intelligence platform performs comprehensive domain analysis in a single automated workflow. When you enter a domain or IP address, the tool queries authoritative nameservers and gathers data across multiple dimensions: DNS records, email security configuration, SSL/TLS certificates, and optional global propagation checks.

The analysis covers all major DNS record types (A, AAAA, MX, TXT, NS, CNAME), automatically performs reverse DNS lookups to map IP addresses to hostnames, inspects SSL certificates for expiry and configuration issues, and parses email security records (SPF, DMARC, DKIM) to calculate a security score from 0 to 100.

DNS Record Types Explained

Email Security Analysis

When enrichment is enabled, our tool performs deep email security analysis by parsing SPF, DMARC, and DKIM records. The security score (0-100) reflects your domain's resilience against email spoofing and phishing attacks.

SPF (Sender Policy Framework) defines which mail servers can send email on behalf of your domain. A valid SPF record starts with v=spf1 and includes mechanisms like include:, ip4:, and enforcement qualifiers (-all for strict rejection, ~all for soft fail).

DMARC (Domain-based Message Authentication) builds on SPF and DKIM by instructing receiving servers how to handle authentication failures. Policies include p=none (monitoring only), p=quarantine (send to spam), and p=reject (block delivery). Our tool highlights weak policies and recommends upgrades.

DKIM (DomainKeys Identified Mail) uses cryptographic signatures to verify email authenticity. Each sending server uses a selector (like default._domainkey) to publish public keys. Our tool parses DKIM TXT records and validates key configuration.

SSL/TLS Certificate Inspection

When SSL inspection is enabled, our tool connects to your domain over HTTPS and retrieves certificate metadata including issuer (Let's Encrypt, DigiCert, etc.), subject alternative names (SANs) covering additional domains, validity period, and days until expiry.

The tool highlights certificates expiring within 30 days and provides a downloadable calendar reminder (.ics file) to ensure timely renewal. This prevents service disruption from expired certificates—a common cause of downtime in production environments.

DNS Propagation & Reverse DNS

DNS propagation checking queries multiple global resolvers (Google DNS 8.8.8.8, Cloudflare 1.1.1.1, Quad9, OpenDNS) to verify consistency across the internet. This is essential after DNS changes—you can confirm whether updates have reached major providers worldwide.

Reverse DNS performs PTR record lookups to resolve IP addresses back to hostnames. This is critical for mail server validation (many spam filters require matching forward and reverse DNS) and network reconnaissance during incident response.

Common Use Cases

DevOps & Site Reliability: Verify DNS changes after infrastructure migrations, confirm CDN integration, validate load balancer configuration, and troubleshoot connectivity issues by inspecting A/AAAA records and nameserver delegation.

Email Deliverability: Diagnose bounced emails by checking MX records and SPF configuration, improve inbox placement by implementing DMARC with strict policies, and monitor email security posture to prevent domain spoofing.

Security Auditing: Assess domain security posture before penetration testing, identify misconfigurations that enable email spoofing, verify certificate validity for compliance requirements, and detect DNS hijacking by monitoring nameserver changes.

Incident Response: During outages, quickly identify DNS resolution failures, check whether SSL certificates expired unexpectedly, trace email routing problems to MX misconfigurations, and verify DNS propagation after emergency changes.

Frequently Asked Questions