# Add and Manage Outbound Prefix

An outbound prefix is a saved dialing code, such as a country code, an area code, or an international access code, that you can attach to an external number before placing the call. Instead of typing the same leading digits every time, you store the prefix once and pick it from a list when you dial. This page walks through creating, updating, and removing outbound prefixes in the Cloud Voice App.

## Add an outbound prefix

Your administrator may already have assigned you one or more outbound prefixes that you can apply to external numbers. When none of the assigned prefixes fit the call you want to make, you can create your own.

:::caution
Before relying on a custom prefix, confirm with your administrator that the prefix is permitted on the server. A prefix the server does not accept will not route your call.
:::

1. On the **Calls** page, tap your account in the top-left corner.
2. Open **Settings > Advanced > Outbound Prefix**.
3. Create the prefix:
   1. Tap the add icon (![Add](/images/pbx/add-black.png)) in the top-right corner.
   2. In the **Prefix Name** field, type a label that helps you recognize the prefix later.
   3. In the **Prefix Number** field, type the digits to prepend.
   4. Tap **Save** in the top-right corner.

:::tip
Give each prefix a name that names its destination, for example "UK (+44)" or "Long distance (1)", so you can pick the right one at a glance while dialing.
:::

To apply a saved prefix when placing a call, press and hold the call button (![Call](/images/pbx/call-out.png)) next to the number, tap **Dial through PBX**, then choose the prefix you want.

:::note
PBX (Private Branch Exchange) is the phone system that handles your calls. **Dial through PBX** sends the call through Cloud Voice rather than your phone's own dialer, which is what lets the saved prefix be added before the number goes out.
:::

![Dial-through options showing a saved outbound prefix ready to prepend to the number](/images/pbx/mobile-dial-through-pbx.png)

The Cloud Voice App attaches the chosen prefix to the number and dials the combined result.

## Edit an outbound prefix

1. On the **Calls** page, tap your account in the top-left corner.
2. Open **Settings > Advanced > Outbound Prefix**.
3. Update the prefix:
   1. Tap the prefix you want to change.
   2. Adjust the prefix name, the prefix number, or both.
   3. Tap **Save** in the top-right corner.

## Delete an outbound prefix

1. On the **Calls** page, tap your account in the top-left corner.
2. Open **Settings > Advanced > Outbound Prefix**.
3. Remove the prefix:
   1. Press and hold the prefix you no longer need.
   2. In the pop-up, tap **Delete**.