> For the complete documentation index, see [llms.txt](https://daisychain.gitbook.io/help/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://daisychain.gitbook.io/help/texting/phone-number-switching.md).

# Phone Number Switching

### Why you might have multiple phone numbers

Organizations often use different numbers for different purposes — for example, one number for event recruitment, and one for general supporter outreach. Having multiple numbers lets your supporters keep those communications distinct and organized.

### The default number

Daisychain uses your **default phone number** as the sending number for new conversations and campaigns unless you specify otherwise.

**To change the default number:**

1. Go to **Settings > Channels > Texting**
2. Click the **Delivery Phone Numbers** tab
3. Find the number you want to make the new default
4. Click **Make default**

### How phone numbers work in active conversations

Phone numbers are "sticky" for "active conversations" — once a conversation is started on a particular number, that number is preserved for follow-up messages, even if you later change the default.

**What counts as an active conversation?** If you've exchanged messages with a contact within the past week, Daisychain considers that conversation active and will continue using the same number. If it's been more than a week since the last message, the conversation is no longer considered active and the next message will go out from the current default.

### When the default number is always used (no stickiness)

There are three situations where Daisychain always uses the current default number, regardless of any prior conversation history:

* [**Campaigns**](/help/texting/campaigns.md)**:** Each Campaign creates a fresh conversation per recipient. The sending number is whatever the default number is at the moment the messages go out.
* [**Automations**](/help/organizing/automations.md)**:** Messages sent automatically when a Person reaches a "Send Message" Automation Step always use the current default phone number.
* [**Flows:**](/help/texting/flows.md) Automated replies in that Flow use the current default phone number, even if that's different than the default phone number the original broadcast came from.