# Caller ID prefix

> Add a label to the caller's number so users know which line or menu option a call came from.

- URL: https://kb.voipcloud.online/pbx/identifiers/caller-id-prefix/
- Section: PBX › Identifiers
- Type: reference
- Applies to: All countries
- PBX object: cid_prefix
- Last reviewed: 2026-11-09

**Caller ID prefix** adds text in front of the caller's number for calls that pass through it. Users see where the call came from before they answer. For example, with the prefix **SALES** a call from 0123456789 shows as **SALES:0123456789**.

You can also set a distinctive ringtone for these calls.

## Add it to your call flow

1. Drag **Caller ID prefix** from the **Identifiers** group onto the canvas and click the gear icon.
2. Enter a **Name** and the **Prefix**.
3. Optionally, set **Alert info** for a distinctive ringtone.
4. Click **Save**, connect it between the call source and the users, and click **Apply configuration**.

![Caller ID prefix settings](https://kb.voipcloud.online/images/pbx/identifiers/caller-id-prefix-settings.webp)

## Settings

| Setting | What it does |
| --- | --- |
| Name | Label on the canvas. |
| Prefix | Text added in front of the caller's number. |
| Alert info | Lets a Webphone or SIP device play a special ringtone. After saving and applying, choose the ringtone in the Webphone under **Settings** › **Ringtones**. |

## Related

- [DTMF prefix](https://kb.voipcloud.online/pbx/identifiers/dtmf-prefix/)
- [Voice menu](https://kb.voipcloud.online/pbx/conditions/voice-menu/)