Attack Surface & Exposure Management
Continuously map internet-facing domain assets, discovering uncatalogued development subdomains, testing servers, and exposed cloud services before adversaries locate them.
How the sector deploys itDomainIntel
Examine publicly available domain, DNS and subdomain information to understand internet-facing digital infrastructure: discover subdomains, analyse zone records, map related domain assets, and maintain structured inventories for attack-surface management and authorised security assessments.
DomainIntel · workspaceDomain scope defined
inventory · domain assetsno markings
- Scope
- DNS
- Subdomains
- Routing
- Dossier
Where it looks
- DNS zone recordswaiting
- CT log streamswaiting
- IP & ASN mappingwaiting
- Related domainswaiting
Running
Interface simulation: an illustration of the workflow, not a live analysis
What it is
Domain, DNS and subdomain intelligence for internet-facing infrastructure
DomainIntel delivers domain intelligence by examining publicly available domain, DNS and subdomain information to help teams understand internet-facing digital infrastructure. It can assist with identifying subdomains, reviewing DNS records and mapping related domain assets, providing valuable context for attack-surface management, asset inventory, threat research and authorised security assessments.
A clearer view of domain relationships can help organisations identify forgotten or unexpected assets, investigate infrastructure changes and prioritise further validation. DomainIntel’s importance is its ability to turn dispersed technical records into an organised picture of a domain’s observable footprint.
Typical capabilities include DNS record analysis, subdomain discovery, domain relationship mapping and structured asset reporting, using passive and otherwise authorised sources wherever possible to provide dependable visibility without invasive network probing.
Key capabilities include DNS record analysis, subdomain and related-domain discovery, and visibility into publicly observable domain assets.
- Inspects A, AAAA, MX, TXT, NS, SOA, and CNAME zone records from open authoritative resolvers
DNS records
Inspects A, AAAA, MX, TXT, NS, SOA, and CNAME zone records from open authoritative resolvers
- Enumerates publicly observable subdomains, hosts and service endpoints without active intrusion
Subdomain discovery
Enumerates publicly observable subdomains, hosts and service endpoints without active intrusion
- Turns dispersed technical records into an organized picture of a domain's observable infrastructure
Asset mapping
Turns dispersed technical records into an organized picture of a domain's observable infrastructure
- Operates using passive and authorised sources to protect operational discretion and server availability
Passive OSINT
Operates using passive and authorised sources to protect operational discretion and server availability
Interactive Domain Topology
From a root domain seed to structured infrastructure intelligence
Simulate multi-resolver DNS harvesting, passive Certificate Transparency streaming, and zone exposure checks.
Interactive Domain Intelligence Engine
Domain, DNS & Subdomain Infrastructure Graph
Passive DNS record harvesting, subdomain mapping and attack-surface exposure identification.
Apex Seed:
apex-security-cloud.io
Passive infrastructure topology · Click any subdomain node to inspect DNS records & exposures
api.v1.apex-security-cloud.io
API Record · AS13335 (Cloudflare, US)
Resolved IP104.21.72.19
DNS Confidence98%
Zone Records (Public DNS)
A104.21.72.19TTL 300s
AAAA2606:4700:3036::6815:4813TTL 300s
Infrastructure Attributes
REST GatewayTLS 1.3 StrictWAF Protected
Exposure Context & Findings
Primary production API gateway endpoint; responsive HTTP 200.
Passive OSINT Standard
Discovered from open DNS resolvers and public Certificate Transparency logs without active vulnerability probing or network intrusion.
Apex Authority:apex-security-cloud.io
DNS Zone Record Analysis
Passive Subdomain Discovery
Domain Asset & Exposure Inventory
How it works
From a root domain seed to structured infrastructure intelligence
- 01
Define root domain scope
Specify target apex domains, wildcard boundaries, and passive discovery policies
- 02
Authoritative DNS record harvest
Query public root resolvers for A, AAAA, MX, NS, SOA, and TXT verification records
- 03
Passive subdomain enumeration
Aggregate subdomains from Certificate Transparency logs, public zone data, and web indexes
- 04
Host & IP infrastructure resolution
Map discovered hostnames to IP allocations, ASN designations, and hosting networks
- 05
Domain relationship & alias clustering
Surface shared mail servers, name server clusters, CNAME aliases, and affiliate assets
- 06
Stale asset & exposure gap surfacing
Highlight orphaned subdomains, dangling CNAME pointers, and unmaintained test endpoints
- 07
Structured domain asset dossier
Synthesise normalized zone maps, asset inventories, and audit trails for security review
DomainIntel · workspace01 Define root domain scope
Interface simulation: an illustration of the workflow, not a live analysis
- 01
Define root domain scope
Specify target apex domains, wildcard boundaries, and passive discovery policies
- 02
Authoritative DNS record harvest
Query public root resolvers for A, AAAA, MX, NS, SOA, and TXT verification records
- 03
Passive subdomain enumeration
Aggregate subdomains from Certificate Transparency logs, public zone data, and web indexes
- 04
Host & IP infrastructure resolution
Map discovered hostnames to IP allocations, ASN designations, and hosting networks
- 05
Domain relationship & alias clustering
Surface shared mail servers, name server clusters, CNAME aliases, and affiliate assets
- 06
Stale asset & exposure gap surfacing
Highlight orphaned subdomains, dangling CNAME pointers, and unmaintained test endpoints
- 07
Structured domain asset dossier
Synthesise normalized zone maps, asset inventories, and audit trails for security review
Capabilities
Six core capabilities for complete domain & DNS visibility
Replace piecemeal CLI lookups and ad-hoc scripts with systematic, passive infrastructure reconnaissance.
DNS record analysis
Interface simulation: an illustration of the workflow, not a live analysis
Comparison
DomainIntel vs ad-hoc terminal lookups and brute-force scanners
Why structured domain intelligence, passive discovery, and relationship mapping surpass disconnected DNS scripts.
Comprehensive DNS zone harvesting
- Ad-hoc CLI queries
- Partly: Manual dig / nslookup
- Active brute scanners
- Partly: Basic record dumps
- FaceOff DomainIntel
- Yes: Automated multi-record harvest
Passive subdomain enumeration
- Ad-hoc CLI queries
- No: Wordlist guesswork
- Active brute scanners
- Partly: Noisy network flooding
- FaceOff DomainIntel
- Yes: Passive CT logs & zone feeds
Domain relationship & asset clustering
- Ad-hoc CLI queries
- No: Disconnected entries
- Active brute scanners
- No: Raw hostname lists
- FaceOff DomainIntel
- Yes: Visual infrastructure mapping
Dangling CNAME & orphan detection
- Ad-hoc CLI queries
- No: Easily overlooked
- Active brute scanners
- Partly: Basic status code checks
- FaceOff DomainIntel
- Yes: Automated takeover alerts
Non-intrusive passive OSINT
- Ad-hoc CLI queries
- Yes: Standard DNS
- Active brute scanners
- No: Triggers IDS / WAF alarms
- FaceOff DomainIntel
- Yes: 100% passive & polite
Target query confidentiality
- Ad-hoc CLI queries
- Partly: Public resolver exposure
- Active brute scanners
- No: Cloud vendor logging
- FaceOff DomainIntel
- Yes: On-premise / Sovereign
The architecture
From a root domain seed to structured infrastructure intelligence
Multi-resolver DNS harvesting, passive Certificate Transparency streaming, and sovereign asset synthesis
Target Domain & Scope
apex-domain.com · Subdomain Feeds · CT Streams
Apex namespace definition, root nameservers & passive discovery boundaries
Multi-source passive DNS & certificate streaming
- DNS Zone HierarchiesA, AAAA, MX, TXT, NS, SOA, and CNAME record trees
- Certificate LogsPublic Certificate Transparency streams & SAN hostnames
- IP & ASN TopographyBGP routing tables, IP blocks & hosting infrastructure
- Related Domain GraphShared mail exchangers, name server clusters & partners
Authoritative zone records & certificate SANs
Infrastructure Correlation Core
DomainIntel Discovery & Exposure Engine
Aggregates DNS zone hierarchies, maps subdomains to hosting IPs, and detects dangling CNAMEs
- Multi-resolver authoritative DNS zone harvesting
- Passive Certificate Transparency stream ingestion
- IP allocation, BGP routing & ASN topology mapping
- Dangling CNAME pointer & takeover risk detection
Isolated in sovereign boundary
Controlled Investigation Boundary
Strictly lawful OSINT from publicly accessible sources. Domain targets, DNS zone snapshots, and infrastructure asset dossiers remain entirely within your sovereign environment.
Synthesised investigation assets
Interactive Domain & Subdomain Asset Map
Unified, topological view of discovered hostnames, routing paths and cloud services
Structured Attack Surface & DNS Dossier
Audit-ready asset inventories with full zone provenance, timestamps and risk notes
Measured capabilities
Deep infrastructure coverage, passive efficiency and defensible records
- Discovers infrastructure via public DNS, Certificate Transparency and zone registries without noisy network sweeps
100% Passive sources
Discovers infrastructure via public DNS, Certificate Transparency and zone registries without noisy network sweeps
- Rapidly enumerates large enterprise subdomain estates and complex multi-region cloud routing topographies
Thousands of hosts
Rapidly enumerates large enterprise subdomain estates and complex multi-region cloud routing topographies
- Queries public root and authoritative resolvers without sending intrusive packets to target production hosts
Zero server strain
Queries public root and authoritative resolvers without sending intrusive packets to target production hosts
- Target domains, discovered asset maps, and vulnerability notes remain strictly confined to your environment
Sovereign isolation
Target domains, discovered asset maps, and vulnerability notes remain strictly confined to your environment
DomainIntel is engineered for security, research and attack-surface management teams who need complete visibility of observable domain infrastructure while upholding operational discretion.
Sectors
Where domain and DNS intelligence delivers immediate value
Brand Protection & Anti-Typosquatting
Identify newly registered lookalike domains, suspicious DNS variations, and unauthorized brand uses intended for spear-phishing campaigns or credential harvesting.
M&A Due Diligence & Infrastructure Audits
Quickly assess the external digital estate and technical health of acquisition targets, mapping acquired domain portfolios, cloud dependencies, and legacy servers.
How the sector deploys itThreat Research & Incident Response
Unravel attacker command-and-control infrastructure by mapping shared name servers, historical IP allocations, and co-hosted malicious domains.
How the sector deploys itDeployment
Deploy DomainIntel within your controlled security environment
Designed for immediate deployment with zero exposure of sensitive investigation targets.
01 · Define apex domain scopes and discovery boundaries
Interface simulation: an illustration of the workflow, not a live analysis
Passive and authorised intelligence
DomainIntel operates strictly through passive DNS aggregation, public zone inspections and open Certificate Transparency feeds without launching active scans or intrusive probes against target infrastructure.
The principle
Why disciplined domain intelligence belongs in your toolkit
Moving from piecemeal terminal queries to structured, lawful and defensible infrastructure intelligence.
- Structure beyond scattered terminal commands
- Running manual dig or nslookup queries across hundreds of hostnames is slow, error-prone, and leaves no auditable record. DomainIntel structures the entire process into a unified asset dossier.
- Contextual relationship and infrastructure mapping
- Discovering a hostname is only the start. DomainIntel correlates IP ranges, name server clusters, mail routing, and CNAME chains so analysts immediately understand how domain pieces relate.
- Discipline through passive and polite reconnaissance
- Responsible OSINT avoids noisy brute-force scans that disrupt systems or trigger false alarms. DomainIntel gathers comprehensive intelligence through passive, lawful channels.
- Analyst command over attack surface exposures
- Automated discovery surfaces the records, but human analysts make the decisions. Findings are presented with complete evidence context, empowering teams to prioritise validation and remediation.
Frequently asked questions
Questions security and intelligence teams ask about DomainIntel
Everything you need to know about sources, passive discovery, privacy and lawful operation.
DomainIntel is a domain and DNS intelligence solution that examines publicly available domain, DNS, and subdomain information to help security and research teams understand internet-facing digital infrastructure, catalogue exposed assets, and manage attack surfaces.
No. DomainIntel operates passively. It collects intelligence from authoritative DNS resolvers, Certificate Transparency logs, public zone registries, and open records without sending intrusive connection probes or running vulnerability scans against target hosts.
DomainIntel monitors public Certificate Transparency (CT) log streams, queries open DNS datasets, evaluates historic zone changes, and correlates cross-domain references, discovering subdomains without brute-force packet floods.
Yes. DomainIntel flags CNAME records that point to non-responsive cloud storage buckets, decommissioned hosting providers, or expired SaaS platform services, alerting teams to potential takeover risks.
When installed on premises or within your private cloud, all target seeds, discovered subdomain inventories, and audit logs remain strictly within your sovereign environment. Nothing is shared with external scraper APIs.
DomainIntel exports structured asset inventories in JSON and CSV formats, including DNS record types, resolved IP addresses, ASN designations, certificate issuers, and timestamped discovery trails for audit compliance.
The rest of the line
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