> ## Documentation Index
> Fetch the complete documentation index at: https://technologychecker.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Domain to Technologies Lookup

> Scan any website to detect its full technology stack — frontend, backend, and standalone platforms. Includes company firmographics and technology adoption timeline.

Enter any domain to see its full technology stack: frontend frameworks, backend infrastructure, and standalone platforms. TechnologyChecker normalizes your input automatically (strips protocols, `www` prefixes, and trailing paths), so you can paste any URL format.

<Tip>
  You can also try a quick technology lookup from the [TechnologyChecker homepage](https://technologychecker.io) — no account or signup required.
</Tip>

<img src="https://mintcdn.com/technologychecker/EoFefZgIvEggxecX/images/domain-lookup.jpg?fit=max&auto=format&n=EoFefZgIvEggxecX&q=85&s=ce177ded65d4ea0799edb3ebb2a62350" alt="Domain Technology Lookup page with search bar and stats cards showing 1.5B crawled URLs, 40K technologies detected, and 20 years of historical data" width="1600" height="938" data-path="images/domain-lookup.jpg" />

## How domain lookup works

TechnologyChecker uses a two-stage approach for speed and coverage:

<Steps>
  <Step title="Database lookup (instant)">
    Checks the pre-crawled database of **50M+ websites**. If the domain exists, results appear instantly.
  </Step>

  <Step title="Live detection (5-15 seconds)">
    If no database results are found, a real-time scan runs using browser rendering and pattern matching.
  </Step>
</Steps>

<Info>
  Live detection results display a "Live Result" banner indicator. An animated loading state appears during scanning. See [detection modes](/api-reference/introduction#live-detection) for details on scan speed and accuracy.
</Info>

## What data you get from a domain lookup

After a lookup, you get a complete domain profile with three sections:

<Tabs>
  <Tab title="Technology stack">
    Active technologies are grouped by category. Each technology shows:

    * Technology name and logo
    * Category classification
    * First detected and last detected dates
    * Link to the technology detail page
  </Tab>

  <Tab title="Company metadata">
    <Tooltip tip="Company attributes like industry, employee count, location, founded year, and company type — used for account qualification and segmentation.">Firmographic</Tooltip> data sourced from LinkedIn for the domain's parent company:

    | Field              | Description                  |
    | ------------------ | ---------------------------- |
    | Company name       | Registered business name     |
    | LinkedIn URL       | Company LinkedIn profile     |
    | Industry           | LinkedIn industry category   |
    | Industry code      | Standard industry code       |
    | Country            | Country of headquarters      |
    | City               | City location                |
    | State              | State/province               |
    | Founded year       | Year the company was founded |
    | Employee count     | Employee count range         |
    | Company type       | Business type classification |
    | Associated members | Count of associated people   |
  </Tab>

  <Tab title="Technology timeline">
    A <Tooltip tip="A horizontal bar chart where each bar spans a time range — showing when technologies were first detected through when they were last seen.">Gantt chart</Tooltip> visualization showing when each technology was first and last detected:

    * **Active technologies** — Green bars with continuous timelines
    * **Removed technologies** — Gray bars with ended timelines
    * **Hover interaction** — See exact first-detected and last-detected dates
  </Tab>
</Tabs>

<Tip>
  The technology timeline is useful for understanding a company's tech evolution. Recently removed technologies might indicate dissatisfaction and a buying opportunity.
</Tip>

## Related pages

<CardGroup cols={2}>
  <Card title="Technologies" icon="microchip" href="/features/technologies">
    Browse 40,000+ tracked technologies with market share data.
  </Card>

  <Card title="Lead lists" icon="list-check" href="/features/lead-lists">
    Build prospect lists from domain lookup results.
  </Card>

  <Card title="Domain technologies API" icon="globe" href="/api-reference/introduction#domain-technologies">
    Look up technologies via API for any domain.
  </Card>

  <Card title="Live detection API" icon="bolt" href="/api-reference/introduction#live-detection">
    Real-time detection with multiple scan modes.
  </Card>
</CardGroup>

## Frequently asked questions

<AccordionGroup>
  <Accordion title="What happens if a domain isn't in the database?">
    If no pre-crawled data exists, TechnologyChecker automatically runs a live detection scan using browser rendering. Live results display a "Live Result" banner. You can also trigger this manually via the [live detection API](/api-reference/introduction#live-detection) (5 credits vs 1 credit for database lookups).
  </Accordion>

  <Accordion title="What URL formats are accepted?">
    TechnologyChecker normalizes your input automatically. You can enter `example.com`, `https://example.com`, `www.example.com`, or `https://www.example.com/path` — all resolve to the same domain lookup.
  </Accordion>

  <Accordion title="How fresh is the technology data?">
    Database results reflect the most recent crawl cycle. Each technology record includes `first_seen` and `last_seen` timestamps so you can see exactly when detection occurred. For real-time results, use [live detection](/api-reference/introduction#live-detection).
  </Accordion>

  <Accordion title="Can I see technologies a domain previously used?">
    Yes. The domain profile includes both active technologies and historical technologies that are no longer detected. Use the [technology history endpoint](/api-reference/introduction#domain-technologies) (`GET /v1/domain/{domain}/history`) for the full timeline with status changes.
  </Accordion>
</AccordionGroup>