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

# Phone Calls

> Configure phone call notifications for critical alerts and emergency escalation

<Tip>
  **Monitoring as Code**: Learn more about the [Phone Call Alert Channel Construct](/constructs/phone-call-alert-channel).
</Tip>

The phone numbers used for phone call alerting need to be in [E.164 format](https://www.twilio.com/docs/glossary/what-e164). Stick to the following rules, and you'll be fine:

* Prepend international access codes with a + sign
* Do not use any white spaces
* Use up to 15 characters

<img src="https://mintcdn.com/checkly-422f444a/riTtJrRZAx73iREC/images/docs/images/alerting/phone-call.png?fit=max&auto=format&n=riTtJrRZAx73iREC&q=85&s=9c93cba871eb93c8fd8359301e9ff2ff" alt="send monitoring alerts with phone calls" width="1021" height="669" data-path="images/docs/images/alerting/phone-call.png" />

You can add as many phone number channels as you like.

## Supported countries and regions

| Country                     |
| --------------------------- |
| Argentina (+54)             |
| Australia (+61)             |
| Austria (+43)               |
| Belgium (+32)               |
| Brazil (+55)                |
| Canada (+1)                 |
| Chile (+56)                 |
| Czech Republic (+420)       |
| Denmark (+45)               |
| France (+33)                |
| Germany (+49)               |
| Hungary (+36)               |
| Iceland (+354)              |
| India (+91)                 |
| Israel (+972)               |
| Italy (+39)                 |
| Liechtenstein (+423)        |
| Lithuania (+370)            |
| Luxembourg (+352)           |
| Malta (+356)                |
| Mexico (+52)                |
| Netherlands (+31)           |
| Norway (+47)                |
| Paraguay (+595)             |
| Poland (+48)                |
| Portugal (+351)             |
| Spain (+34)                 |
| Switzerland (+41)           |
| United Arab Emirates (+971) |
| United Kingdom (+44)        |
| United States (+1)          |
| Uruguay (+598)              |
| Vietnam (+84)               |

<Info>
  If your country is not supported feel free to reach out to our [support team](mailto:support@checklyhq.com).
</Info>

## Phone call number and sender ID

Phone call alerts always use the following number: +18142508623. You can save the number as a contact to allow alerts bypassing any do-not-disturb settings.

<Note>For limits and other phone call related questions, please refer to our [Pricing page](https://www.checklyhq.com/pricing/#features).</Note>