> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.nimbata.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# How to add new tracking numbers

Once your initial setup is running, you may need to add more numbers to handle traffic spikes or to track a new marketing source. 

**There are two ways to do this.**

| If you're setting up your first tracking numbers, follow this guide instead: https://help.nimbata.com/en/article/tracking-numbers-101-how-to-set-up-call-tracking-numbers-with-nimbata-1ww2fxu/

### Option A. Add numbers to an existing pool

Use this when you need to expand an existing pool.
For example, during a traffic spike that requires more numbers to maintain accurate attribution.

* Go to [Tracking > Numbers](https://app.nimbata.com/tracking/numbers).
* Locate the pool you want to expand.
* Click the **three-dot menu (⋮)** to the far right of the pool.
* Select **'Add tracking number(s) to this group'** and follow the prompts.

![](https://storage.crisp.chat/users/helpdesk/website/-/2/f/4/5/2f459a49cf382400/image_yqresq.png)

### Option B. Create a new tracking source

Use this when you're launching a new campaign or want to track a brand-new source separately.

### Step 1. Start the setup

* Go to [Tracking > Numbers](https://app.nimbata.com/tracking/numbers).
* Click **'+ Add'**.
* Choose where you want to place your tracking numbers.
* Click **'Next'**.

![](https://storage.crisp.chat/users/helpdesk/website/-/2/f/4/5/2f459a49cf382400/image_c0g0bb.png)

### Step 2. Calculate your pool size

* Click **'Get from calculator'.**
* Enter your peak hourly visitors OR 
* Click **'Get from Google'** to pull the data automatically from GA4.
* Click **'Use pool'** to apply the recommended size.

![](https://storage.crisp.chat/users/helpdesk/website/-/2/f/4/5/2f459a49cf382400/image_gpwlij.png)

### Step 3. Choose your numbers and finish

* Select your preferred area code.
* Pick numbers from the list.
* Click **'Finish'**.

### Step 4. Name your numbers

* Click on a number name to edit it inline.
* Click the **green check icon** to save.

**To rename multiple numbers at once:**
* Tick their checkboxes.
* Click **'Modify number name'**.
---

🎉 Your new tracking numbers are ready. Assign them to a call flow to start receiving calls.
Detailed Guide: [**How to assign tracking numbers to call flows**](https://help.nimbata.com/en/article/how-to-assign-tracking-numbers-to-call-flows-uxu7qb/) 
Detailed Guide: [**How to calculate the size of your tracking number pool**](https://help.nimbata.com/en/article/how-to-calculate-the-size-of-your-tracking-number-pool-k4cca9/)