> For the complete documentation index, see [llms.txt](https://doc1.antgst.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc1.antgst.com/help-center/sms/marketing-sms/number-file.md).

# Number File

Upload phone number lists in advance for easy reuse when sending marketing SMS. Supports .txt and .xlsx formats.

#### 1. Import a File

Click **"Import File"** to open the upload dialog:

* Select the **Number Belonging Country** (required)
* Click or drag your file into the upload area
* Supported formats: `.txt`, `.xlsx`, `.xls`
* Max file size: **20MB**
* File name: Only Chinese, English, and numbers are allowed
* Content format: One number per line (e.g., `+8613812345678`)

<figure><img src="https://1063803597-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FeMT6j6yprSW9Vl5MB4Oi%2Fuploads%2FAHpfOHZiefaUtY2uppyt%2Fimage.png?alt=media&amp;token=3b102c35-e7cc-4c91-a432-e5e57cb48329" alt=""><figcaption></figcaption></figure>

> ✅ Once uploaded, the file will appear in the list and can be selected during SMS sending.

#### 2. File Operations

After successful upload, each file displays three action buttons:

| Button      | Description                                                  |
| ----------- | ------------------------------------------------------------ |
| **Preview** | View the first **50 numbers** in the file to verify accuracy |
| **Edit**    | Rename the file for better identification                    |
| **Delete**  | Remove the file permanently (cannot be restored)             |

<figure><img src="https://1063803597-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FeMT6j6yprSW9Vl5MB4Oi%2Fuploads%2Fgit-blob-76e867c343f08c60aa6d31d3edde4c1910b1e750%2Fimage%20(7).png?alt=media" alt=""><figcaption></figcaption></figure>

> ⚠️ We recommend regularly cleaning up unused files to keep your list organized.


---

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