# Phone Numbers

The **Phone Numbers** page is where you manage your voice agent phone lines — including purchasing new numbers, viewing active ones, and integrating external numbers via Twilio.

Stammer uses **Twilio** as its backend provider, giving you access to reliable global coverage and a wide selection of numbers across most countries.

#### **1. Purchasing a New Number**

To purchase a new number directly inside Stammer:

1. Navigate to the **Phone Numbers** tab in your dashboard.
2. Click **+ Purchase Numbers**.
3. Select your **Country** (e.g., United States, Canada, Australia, etc.).
4. Optionally, use the **Number Pattern** field to search for specific digits (like “123” or an area code).
5. Browse the list of available numbers by **location** and **price**.
6. Click **Purchase** next to your desired number.

Once purchased, the number will automatically appear under your **Active Numbers** tab and can be assigned to any voice agent.

> 💡 **Tip:** U.S. numbers start at around **$1.72/month**, depending on region and availability.

If your country is not available to purchase from Stammer directly then you can use the Connect Twilio option which will allow you to register a phone number directly in Twilio and then connect that phone number to Stammer. 

{% content-ref url="phone-numbers/connect-twilio" %}
[connect-twilio](https://docs.stammer.ai/stammer.ai-docs/voice-ai-agents/phone-numbers/connect-twilio)
{% endcontent-ref %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.stammer.ai/stammer.ai-docs/voice-ai-agents/phone-numbers.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.