---
title: "Realm definition"
date: "2024-02-14T06:18:38+00:00"
summary: "Understand realms in Acquia Cloud Platform: configured spaces for environments with unique identifiers for CLI, API, and Cloud Hooks."
image:
type: "page"
url: "/resources/realm-definition"
id: "79825a3b-d8cd-4e06-a565-df3bcf288587"
---

For more information about Drupal terms and terminology, see the [Term index](/definitions).

If you host your website on Cloud Platform, a _realm_ is the configured space in which an [environment](/definitions/environment) exists. Each realm has a unique identifier that’s a required configuration option in some commands issued using the command line interface (CLI), the [Cloud Platform API](/acquia-cloud-platform/develop-apps/api), and [Cloud Hooks](/acquia-cloud-platform/automating-cloud-hooks "Automating with Cloud Hooks").

Some common realms include, but aren’t limited to the following:

*   Cloud Platform Enterprise: `prod`
*   Cloud Platform Professional: `devcloud`
*   Site Factory: The value can vary for Site Factory subscribers. To identify the correct realm for an Site Factory subscription, [contact Acquia Support](/service-offerings/support#contact-acquia-support).

Cloud Platform will display the realm for your subscription in the [default domain name](/acquia-cloud-platform/manage-apps/domains) included with your subscription. For example, a default domain name for a website in a Cloud Platform Professional subscription can be `examplesite.devcloud.acquia-sites.com`.

You may also discover the realm for your subscription when accessing your environments [using SSH](/acquia-cloud-platform/manage-apps/command-line) or [using SFTP](../../cloud-platform/manage/sftp.html).

The realm for your subscription is also available as the `AH_REALM` [environment variable](/acquia-cloud-platform/develop-apps/env-variable).