Go to example tasks

Find all subdomains of a domain

List every subdomain that appears in public SSL certificates for a domain, from Certificate Transparency logs. Useful for asset inventory of your own infrastructure. Replace the example domain with your own.

Try for free
Subdomain Finder β€” SSL Certificate Transparency Lookup
Subdomain Finder β€” SSL Certificate Transparency Lookupkeyman98/cert-transparency-lookup
Domain
Subdomains
Certificates
Active
+2 fields
Text
Number
Boolean
List
Object

Input

Domains(required):python.org
Include expired certificates:false
Max certificates per domain:100

Output fields

Domain
Subdomains
Certificates
Active
Source
Error

How it works

Sign up on Apify or log in

The Subdomain Finder β€” SSL Certificate Transparency Lookup Actor is ready to run with the inputs already set for "Find all subdomains of a domain". Sign up or log in and you'll land in Apify Console with a copy of this exact task.

Start the "Find all subdomains of a domain" task

The Subdomain Finder β€” SSL Certificate Transparency Lookup Actor will start running based on the input automatically. You can also change all the input fields, like domains, include expired certificates, and more, to match your specific use case.

Receive the "Find all subdomains of a domain" output

Monitor the progress in real time. You will be notified as soon as your dataset is complete and ready for review. Each result includes data such as domain, subdomains, certificates, and more.

Integrate into your workflow

The final output is delivered in JSON, CSV, or Excel format, ready to be plugged into your workflow. You can also run the "Find all subdomains of a domain" task via API.

Image

Integrate "Find all subdomains of a domain" into your workflow

Connect "Find all subdomains of a domain" with 100+ integrations, or run it via API or MCP.

Webhook

Webhook

n8n

n8n

Make

Make

Zapier

Zapier

Airbyte

Airbyte

Keboola

Keboola

IFTTT

IFTTT

Hubspot

Hubspot

GDrive

GDrive

Gmail

Gmail

Apify MCP

Apify MCP

GitHub

GitHub

Slack

Slack

LangChain

LangChain

LlamaIndex

LlamaIndex

Flowise

Flowise

Pinecone

Pinecone

OpenAI

OpenAI

Mastra

Mastra

Clay

Clay