After adding multiple sites to your account, you can optionally assign a site code to each site. This allows users to easily identify and dial users in the same site.

Assigning site codes will cause the following changes to phone users' extensions:

• Site codes will be prefixed to each extension number that belongs to that site.
• Existing extensions will be shortened (known as the short extension) so that they don't exceed the 6-digit limit. Users can dial the short extension to reach users in the same site.
• The long extension is a combination of the site code and short extension. This can be used by external callers or phone users in other sites.
• Site codes can be 1 to 6 digits. Since there's a default 15-digit limit on extensions, the short extension can be up to 9 digits. If you require longer extensions, submit a request to Zoom Support.

This article covers:

• How to enable and assign site codes
• How to disable site codes

Prerequisites for managing site codes

• Pro, Business, or Education account
• Account owner or admin privileges
• Zoom Phone license

Site code requirements

Site codes can be 1 to 6 digits. Since there's a default 15-digit limit on extensions, the short extension can be up to 9 digits. If you require longer extensions, submit a request to Zoom Support.

How to enable and assign site codes

1. Sign in to the Zoom web portal.
2. In the navigation menu, click Phone System Management then Company Info.
3. Click Account Settings.
4. In the Multiple Sites section, click the Site Code toggle to enable site codes.
5. Specify the Site Code and Short Extension Length for each site, then click Next.
   Note: Site codes can be 1 to 6 digits. Since there's a default 15-digit limit on extensions, the short extension can be up to 9 digits. If you require longer extensions, submit a request to Zoom Support.
6. Click Next to add the site codes and assign new extensions to users.

How to disable site codes

If you don't want to use site codes, you can disable them.

Note: Disabling site codes will not revert extension numbers to their default extension numbers before you enabled site codes. Extension numbers will still be a combination of the site code and short extension, but you will lose the functionality of dialing the short extension number to reach users in the same site.

1. Sign in to the Zoom web portal.
2. In the navigation menu, click Phone System Management then Company Info.
3. Click Account Settings.
4. Turn off the Site Code toggle.
5. Click Disable to confirm.