> ## 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.

# A Phone Number in the aria-label or title Attribute Doesn't Swap

> The Invoca Tag only swaps numbers in an anchor's href and visible text — it doesn't check custom attributes like aria-label or title.

## Symptoms

A phone number in the `aria-label` or `title` attribute stays the same instead of being replaced with an Invoca number:

```html theme={null}
<a href="tel:+1888.123.4567" aria-label="1.888.111.2222" title="call 888.111.2222">
1.888.123.4567
</a>
```

## Cause

The Invoca Tag only targets the `href` attribute of an `<a>` tag and its inner text content (the visible phone number) to perform number swapping. It doesn't check other custom attributes, such as `aria-label` or `title`, since these aren't consistently used to display phone numbers.

## Resolution

Swapping the number in a custom attribute like `aria-label` or `title` requires a custom code update. Contact your account team or [support@invoca.com](mailto:support@invoca.com) to engage Invoca Technical Services for help with this.

**Applies to:** Number swap, Invoca Tag

## Where to go next

* [Tag Wizard: Custom Code](/s/article/tag-wizard-custom-code)