---
schema_version: "1"
id: a1b2d4f5c8db54a908da3d6f99bd4f1eab19c542646d4342b9c988499a174c28
title: IsPhoneNumber
collection: developer
version: current
locale: en-us
portal_url: https://docs.salesforce.com/developer/current/en-us/marketing-cloud/guides/mc-programmatic-content/ssjs_platformUtilityIsPhoneNumber.md
canonical_url: https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/ssjs_platformUtilityIsPhoneNumber.html
source_site: developer.salesforce.com
content_type: documentation
content_hash: 9c288c164f074b8889c752f69cddcfa9019b4b2f38156f2970a91dd3a2ad6b3b
products:
  - Marketing Cloud Engagement APIs and Programmatic Languages
  - Marketing Cloud
---
# IsPhoneNumber

## Overview

Evaluates a string value and determines if that string value contains a valid phone number. This function returns a Boolean value based on the evaluation.

### Syntax

IsPhoneNumber(1)

### Function Properties

<!--complex table-->

| Ordinal | Type   |              | Description        |
| ------- | ------ | ------------ | ------------------ |
| **1**   | string | **Required** | String to evaluate |

## Example

```
<script runat="server">
     Platform.Function.IsPhoneNumber("3175555555");
</script>
```