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

# Why Are There Pooling Calls With No Dynamic Marketing Data Attribution?

> These are most likely Out of Session calls — calls to a RingPool number that weren't served to a website visitor by the Invoca tag, so no marketing data was collected.

## What causes this

If a RingPool number is called directly without being served by the Invoca tag, the call still connects — but because it isn't part of an active session, the Invoca tag never collected marketing data to apply to it. The values for those fields are blank.

Out of Session calls can happen when:

* A repeat caller dials an old RingPool number saved in their phone.
* The call is spam.
* A RingPool number was hard-coded on a website outside of the tag's normal serving process.

## How to identify an Out of Session call

Out of Session calls are most easily identified by a complete lack of any dynamic attribution. If only one or two fields are blank while others were captured, the call is likely not Out of Session and needs further investigation.

## Where to go next

* [RingPool Management](/s/article/ringpool-management)
* [RingPools Sizing Logic](/s/article/ringpools-sizing-logic)