Find takeover-vulnerable subdomains before attackers claim them.
Every unclaimed CNAME is an open door. We continuously fingerprint your DNS, cross-reference cloud service ownership, and flag dangling records the moment they appear.
When abandoned resources become open doors
When a subdomain points at a cloud resource (S3 bucket, Heroku app, GitHub Pages, Azure service) that no longer exists, an attacker can register the resource and inherit the subdomain. They then host malware, run phishing, or steal cookies scoped to your domain. Standard monitoring misses this because the DNS record still resolves.
How Subdomain Takeover Detection Works
DISCOVERY
We enumerate your DNS zones and passive-DNS history to build a live map of every subdomain, including ones your ops team forgot about.
FINGERPRINT
Each record is checked against 40+ cloud-provider takeover signatures — S3, GitHub, Fastly, Heroku, Netlify, Vercel, Azure, and more.
ALERT
Vulnerable records surface in your dashboard with the exact provider, evidence, and remediation instructions.
Key Features & Core Architecture
40+ takeover signatures
Cloud-provider-specific fingerprints covering AWS, Azure, GCP, GitHub, Netlify, Vercel, Fastly, Heroku, and more.
Continuous scanning
Every subdomain re-verified daily. New dangling records surface within minutes.
Passive DNS history
Catches shadow-IT domains that never made it into your primary zone file.
Evidence trail
Screenshots and raw HTTP responses attached to every finding for audit.
One-click ticketing
Push findings into Jira, ServiceNow, or a custom webhook.
Detected takeover-vulnerable subdomains
| Sr. No. | Subdomain | Provider | Severity | First seen | Status |
|---|---|---|---|---|---|
| 1 | stage-app.example.com | Heroku | Critical | 2 hours ago | Open |
| 2 | docs.example.com | GitHub Pages | High | 1 day ago | In review |
| 3 | promo.example.com | S3 | Medium | 3 days ago | Resolved |
Seamless Output Destinations
Stream threat signals directly into your existing security workflow and ticketing systems.
Webhook
Real-time alerts via HTTP
Jira
Auto-create tickets
ServiceNow
ITSM workflow integration
Slack
Instant team notifications
Built for Every Security Role
M&A due diligence
Surface takeover risk in acquired brand portfolios before the deal closes.
Migration cleanup
Catch retired resources the ops team forgot to delete during platform migrations.
Ephemeral environments
Detect abandoned staging domains from short-lived experiments before they are exploited.
Frequently Asked Questions
See what dangling subdomains are exposing you today.
Get an agentless subdomain takeover assessment across every domain you own — and a few you didn't know you did.