DNS Lookup Tool
Enter a domain name or IP address below to perform a DNS lookup. The tool retrieves available DNS records and provides an automated intelligence analysis of the domain configuration.
DNS Lookup Tool & DNS Intelligence Checker
Use the DNS Lookup Tool to inspect DNS records for a domain and analyze its email security, DNS infrastructure and technical configuration. Check A, AAAA, MX, TXT, NS, CNAME, SOA, SRV, SPF and other DNS records in one place.
DNS records contain important information about how a domain operates on the internet. They can reveal web servers, mail infrastructure, authoritative nameservers, email authentication policies and other technical configuration signals.
DNS Intelligence goes beyond displaying raw DNS records. It analyzes the available records and organizes useful findings into categories such as email security, email infrastructure, DNS infrastructure and domain verification.
What Does This DNS Lookup Tool Check?
The tool supports multiple DNS record types. Each record provides different information about a domain’s infrastructure and services.
A Record
An A record maps a domain name to an IPv4 address. It can help identify the IPv4 infrastructure associated with a domain.
AAAA Record
An AAAA record maps a domain to an IPv6 address. It provides information about IPv6 connectivity and infrastructure.
MX Record
MX records identify the mail servers responsible for receiving email for a domain. They can also provide useful signals about the domain’s email provider.
TXT Record
TXT records can contain domain verification information, email authentication policies and other configuration data published through DNS.
NS Record
NS records identify the authoritative nameservers for a domain and provide information about its DNS hosting infrastructure.
CNAME Record
A CNAME record creates an alias from one domain name to another hostname. It is commonly used for services, subdomains and hosted applications.
SOA Record
The Start of Authority record contains important administrative and technical information about a domain’s authoritative DNS zone.
SRV Record
SRV records provide service discovery information, including the hostname and port associated with supported services.
SPF
SPF helps identify which mail servers are authorized to send email on behalf of a domain. The tool also analyzes the SPF policy and include mechanisms.
DMARC
DMARC defines how receiving mail systems should handle messages that fail email authentication checks. The intelligence analysis identifies the configured DMARC policy and reporting configuration.
What Is DNS Intelligence?
A traditional DNS lookup returns technical records. DNS Intelligence takes the next step by analyzing those records and converting them into structured signals that are easier to understand.
Instead of requiring users to interpret every DNS record manually, the system identifies useful infrastructure and email security signals from the available DNS configuration.
Email Security Analysis
Email security is one of the most important parts of DNS configuration. The intelligence system examines available email authentication records and identifies useful security signals.
SPF Analysis
The tool detects SPF records and analyzes their configured policy. It can identify whether the domain uses a strict -all policy or a less restrictive ~all policy.
The system also identifies SPF include mechanisms, which can help reveal third-party services authorized to send email for the domain.
DMARC Analysis
The tool detects DMARC records and analyzes the configured policy, including policies such as none, quarantine and reject.
It can also identify aggregate reporting configuration when a DMARC reporting address is present.
DKIM Analysis
DKIM uses cryptographic signatures to help authenticate email messages. DKIM records are published under selector-specific DNS names.
The intelligence system can test known selector candidates based on the detected mail provider. Because DKIM selectors are not universally discoverable from standard DNS records, an unverified result does not necessarily mean that DKIM is absent.
DNS-based analysis provides configuration signals. It does not by itself prove that every email sent from a domain is correctly authenticated or that an organization is fully protected against email attacks.
Email Infrastructure
DNS records can provide useful information about a domain’s email infrastructure.
Mail Provider Detection
MX records are analyzed to estimate the mail provider being used by the domain. This can help identify whether email infrastructure is associated with providers such as Google, Microsoft or other email services.
MX Records
The system reports whether mail exchange records are present and shows the configured mail infrastructure returned by DNS.
DNS Infrastructure
DNS Intelligence also analyzes the infrastructure responsible for resolving the domain.
DNS Provider
The system estimates the DNS provider using authoritative nameserver information.
Nameservers
Authoritative nameservers are analyzed to identify DNS redundancy and provide information about the domain’s authoritative DNS configuration.
SOA Information
The Start of Authority record provides additional information about the domain’s authoritative DNS zone.
Infrastructure Analysis
DNS Intelligence also identifies basic network and service infrastructure associated with a domain.
IPv4 Addresses
A records are analyzed to identify IPv4 addresses associated with the domain.
IPv6 Addresses
AAAA records are analyzed to determine whether IPv6 addresses are published.
CNAME
CNAME configuration is checked to identify whether the queried domain uses a canonical hostname.
SRV Records
SRV records are checked for service discovery information.
Domain Verification Signals
TXT records are often used by online services to verify ownership or control of a domain.
DNS Intelligence can identify recognizable domain verification records associated with services such as Google, Microsoft, Apple and Facebook when those records are present.
These signals can provide additional context about services connected to a domain.
How DNS Intelligence Works
The analysis process follows several steps:
- The domain is submitted to the DNS lookup system.
- Available DNS records are queried.
- The returned records are organized by record type.
- Email-related records are analyzed for security signals.
- MX records are used to identify the estimated mail provider.
- Nameserver records are analyzed to estimate the DNS provider.
- Infrastructure records are analyzed for IPv4, IPv6, CNAME and service information.
- Verification-related TXT records are identified.
- The results are organized into structured intelligence findings.
Why Use a DNS Intelligence Tool?
Raw DNS records can be difficult to interpret, especially when a domain has many TXT records, multiple mail providers or complex email authentication configurations.
DNS Intelligence organizes these technical signals into understandable categories so that users can quickly identify important aspects of a domain’s configuration.
It can be useful for DNS research, website infrastructure analysis, email security reviews, troubleshooting and cybersecurity investigations.
Frequently Asked Questions
What is a DNS lookup?
A DNS lookup retrieves DNS records associated with a domain name. These records provide information about websites, mail servers, nameservers, services and other internet infrastructure.
What DNS records can this tool check?
The tool supports A, AAAA, MX, TXT, NS, CNAME, SOA, SRV, SPF and Reverse DNS lookups. It can also analyze available DNS records through the DNS Intelligence system.
Can DNS lookup identify an email provider?
Yes. MX records can provide useful signals about the mail infrastructure used by a domain. The intelligence system uses these records to estimate the mail provider.
Can I check SPF and DMARC?
Yes. The DNS Intelligence analysis detects available SPF and DMARC records and provides additional information about their policies and configuration.
Does the tool check DKIM?
The system supports DKIM selector testing and provider-aware selector discovery. Because a DKIM selector is not always discoverable through standard DNS records, an unverified result does not necessarily mean DKIM is missing.
What is DNS Intelligence?
DNS Intelligence is the process of analyzing DNS data and turning raw records into useful infrastructure, email security and domain configuration signals.
Is this DNS lookup tool free?
The DNS Lookup Tool is available for users to inspect DNS records and explore domain infrastructure through DNS Intelligence.
Learn More About DNS and Internet Infrastructure
If you want to understand the technology behind DNS and internet infrastructure, explore more DNS Intelligence research and guides.
- What Is DNS? A Beginner’s Guide
- DNS Intelligence Explained
- How DNS Data Becomes Intelligence
- Email Infrastructure Explained
- Web Hosting Explained
Check a Domain’s DNS Configuration
Enter a domain into the DNS Lookup Tool to explore its DNS records and discover useful signals about its email security, DNS infrastructure and internet configuration.
Start your DNS lookup above.