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

# Import Subdomains

> Import subdomain assets into Snapsec AIM using CSV uploads.

## Import Subdomains into AIM

The **Import Subdomains** integration allows you to upload a CSV file containing subdomain records and instantly populate your Asset Inventory.\
This is useful when migrating from legacy systems, importing recon data, or manually maintaining internal inventories.

***

## Prerequisites

Before importing:

* Prepare a valid **CSV file** containing subdomains.
* Ensure each row includes at least the **subdomain value**.
* Optional fields may include:
  * Tags
  * Owner
  * Environment
  * Notes

***

## Access the Import Interface

1. Open Snapsec Suite.
2. Navigate to: **AIM → Integrations**.
3. Locate **Import Subdomains**.
4. Click **Import** to open the upload dialog.

***

## Upload Your CSV

You will see a modal with an upload field.

* Click **Upload File** and select your CSV.
* AIM will parse and validate the structure.
* Any formatting issues will be shown before import.

Once validated, click **Import Now**.

***

## How AIM Processes the Import

After uploading:

* AIM creates or updates subdomain assets automatically.
* Each imported asset is enriched by:
  * Classifier rules
  * Ownership mappings
  * Environment detection
  * Exposure analysis (if adapters are active)

Imported assets immediately appear in the **Subdomains Catalog**.

***

## Troubleshooting

* **Incorrect CSV format** → Ensure headers are correct.
* **Duplicates not updating** → Existing subdomains are matched by value.
* **Ownership not applied** → Check classifier rules in AIM.

***

## Next Steps

> [card] [View Subdomains](https://docs.snapsec.co/products/aim/subdomains)
>
> Explore imported subdomain assets in your inventory.


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