diff --git a/instances/example/config/configuration_files.config.php b/instances/example/config/configuration_files.config.php
index 1675e518..8a4d22d4 100644
--- a/instances/example/config/configuration_files.config.php
+++ b/instances/example/config/configuration_files.config.php
@@ -1,3 +1,4 @@
 <?php
 include ROOT_PATH . '/vendor/sifophp/sifo-common-instance/config/configuration_files.config.php';
 $config['locale'] = 'instances/example/config/locale.config.php';
+$config['domains'] = 'instances/example/config/domains.config.php';
diff --git a/instances/example/config/domains.config.php b/instances/example/config/domains.config.php
new file mode 100644
index 00000000..a53d11c5
--- /dev/null
+++ b/instances/example/config/domains.config.php
@@ -0,0 +1,34 @@
+<?php
+
+$config['core_inheritance'] = array( 'Sifo' );
+
+$config['redirections'] = array(
+	array( 'from' => 'www.sifo.local', 'to' => 'http://sifo.local' ),
+	array( 'from' => 'www2.sifo.local', 'to' => 'http://sifo.local' ),
+);
+
+$config['instance_type'] = 'instantiable';
+
+$config['sifo.local'] = array(
+	'devel' => true, // Domain is marked as development
+	'has_debug' => true, // Domain shows the floating debug box.
+	'instance' => 'example',
+	'language' => 'en_US',
+	'language_domain' =>'messages',
+	'lang_in_subdomain' => array( 'es' => 'es_ES', 'en' => 'en_US' ),
+	'www_as_subdomain' => false,
+	'static_host' => 'http://static.sifo.local',
+	'media_host' => 'http://static.sifo.local', // Alternative static content (media). Comment to disable.
+	'database' => array(
+		'db_driver' => 'mysql', // To use transactions you must use mysqli driver.
+		'db_host' => '127.0.0.1',
+		'db_user' => 'root',
+		'db_password' => 'root',
+		'db_name' => 'yourdatabase',
+		'db_init_commands' => array( 'SET NAMES utf8' ) // Commands launched before the queries.
+	),
+	'php_ini_sets' => array( // Empty array if you don't want any php.ini overriden.
+		'log_errors' => 'On',
+		'error_log' => ROOT_PATH . '/logs/errors_' . date( 'Y-m' ) . '.log', // Store a different error file per month. For the lazy rotator :)
+	),
+);
diff --git a/src/Sifo/Domains.php b/src/Sifo/Domains.php
index cfd75dbc..8c950f5a 100644
--- a/src/Sifo/Domains.php
+++ b/src/Sifo/Domains.php
@@ -60,6 +60,21 @@ static public function getInstance()
 		return self::$singleton;
 	}
 
+    /**
+     * Singleton for domain calculation.
+     *
+     * @return Domains
+     */
+    static public function getInstanceFromDomainName($domainName)
+    {
+        if ( !isset( self::$singleton ) )
+        {
+            self::$singleton = new self($domainName);
+        }
+
+        return self::$singleton;
+    }
+
 	private function __construct( $host = null )
 	{
 		$filter_server = FilterServer::getInstance();
diff --git a/test/Sifo/DomainsTest.php b/test/Sifo/DomainsTest.php
new file mode 100644
index 00000000..76d7cdf6
--- /dev/null
+++ b/test/Sifo/DomainsTest.php
@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Sifo\Test\Sifo;
+
+use PHPUnit\Framework\TestCase;
+use Sifo\Domains;
+
+class DomainsTest extends TestCase
+{
+    private const DOMAIN_NAME = 'sifo.local';
+
+    public function testGetInstanceFromDomainName()
+    {
+        $domain = Domains::getInstanceFromDomainName(self::DOMAIN_NAME);
+        $this->assertSame(self::DOMAIN_NAME, $domain->getDomain());
+    }
+}
diff --git a/test/bootstrap.php b/test/bootstrap.php
index a23c8c70..d2f6b46f 100644
--- a/test/bootstrap.php
+++ b/test/bootstrap.php
@@ -10,4 +10,6 @@
 if (false === defined('ROOT_PATH')) {
     define('ROOT_PATH', $rootDir);
 }
+
+$_SERVER['HTTP_HOST'] = 'sifo.local';
 Bootstrap::$instance = 'example';