# Export and Import Allowed Numbers

Cloud Voice lets you download your allowed numbers as a CSV (comma-separated values) file. That file doubles as a template: edit it offline to add, remove, or update entries, then upload it back to apply your changes in bulk.

:::note
PBX stands for Private Branch Exchange, the phone system that routes your calls. The Allowed Numbers list lives in the PBX web portal under **Call Features > Blocked/Allowed Numbers > Allowed Numbers**. Exporting and importing let you manage the whole list at once instead of editing entries one by one.
:::

## Export allowed numbers

Exporting writes every allowed number to a single CSV file that you can review and modify.

1. Sign in to the PBX web portal and open **Call Features > Blocked/Allowed Numbers > Allowed Numbers**.
2. Click **Export**.

The CSV file downloads to your computer. For field-by-field guidance on what each column means and how to fill it in, see [Allowed Numbers Parameters](/pbx/administrator-guide/import-and-export-parameters-allowed-numbers/).

## Import allowed numbers

:::tip
Export your current allowed numbers first and use that download as your starting template. Working from a valid file is faster than building one from scratch and avoids formatting mistakes.
:::

Before you import, make sure your file meets these requirements:

- **Format**: UTF-8 encoded `.csv` (UTF-8 is a text encoding that keeps every character readable)
- **Size**: under 50 MB
- **File name**: fewer than 127 characters
- **Contents**: every column must satisfy the field rules described in [Allowed Numbers Parameters](/pbx/administrator-guide/import-and-export-parameters-allowed-numbers/)

:::caution
The import fails if the file breaks any of these limits, so check them before you upload. Save the file as UTF-8: another encoding can garble digits or cause the upload to be rejected. Keep the file under 50 MB and its name shorter than 127 characters.
:::

To import:

1. Sign in to the PBX web portal and open **Call Features > Blocked/Allowed Numbers > Allowed Numbers**.
2. Click **Import**.
3. In the dialog that opens, click **Browse** and choose your prepared UTF-8 `.csv` file.
4. Click **Import**.

When the import finishes, the numbers from your CSV file appear in the **Allowed Numbers** list.