diff --git a/src/Illuminate/Support/Uri.php b/src/Illuminate/Support/Uri.php
index ea46aa54380b..8c863b86bdc1 100644
--- a/src/Illuminate/Support/Uri.php
+++ b/src/Illuminate/Support/Uri.php
@@ -149,6 +149,50 @@ public function host(): ?string
         return $this->uri->getHost();
     }
 
+    /**
+     * Get the subdomain from the URI.
+     */
+    public function subdomain(): ?string
+    {
+        if (! $host = $this->host()) {
+            return null;
+        }
+
+        if (filter_var($host, FILTER_VALIDATE_IP)) {
+            return null;
+        }
+
+        if (count($parts = explode('.', $host)) < 3) {
+            return null;
+        }
+
+        return $parts[0];
+    }
+
+    /**
+     * Get the domain from the URI.
+     */
+    public function domain(): ?string
+    {
+        if (! $host = $this->host()) {
+            return null;
+        }
+
+        if (filter_var($host, FILTER_VALIDATE_IP)) {
+            return null;
+        }
+
+        if (count($parts = explode('.', $host)) < 2) {
+            return null;
+        }
+
+        if (count($parts) >= 3) {
+            return implode('.', array_slice($parts, 1));
+        }
+
+        return $host;
+    }
+
     /**
      * Get the URI's port.
      */
diff --git a/tests/Support/SupportUriTest.php b/tests/Support/SupportUriTest.php
index 1f86588a1eb8..5e4b4bee3169 100644
--- a/tests/Support/SupportUriTest.php
+++ b/tests/Support/SupportUriTest.php
@@ -221,6 +221,99 @@ public function test_path_segments()
         $this->assertEquals(3, $uri->pathSegments()->count());
     }
 
+    public function test_subdomain_extraction()
+    {
+        $uri = Uri::of('https://api.laravel.com');
+        $this->assertEquals('api', $uri->subdomain());
+
+        $uri = Uri::of('https://www.laravel.com');
+        $this->assertEquals('www', $uri->subdomain());
+
+        $uri = Uri::of('https://admin.dashboard.laravel.com');
+        $this->assertEquals('admin', $uri->subdomain());
+
+        $uri = Uri::of('https://laravel.com');
+        $this->assertNull($uri->subdomain());
+
+        $uri = Uri::of('https://example.org');
+        $this->assertNull($uri->subdomain());
+
+        $uri = Uri::of('https://192.168.1.1');
+        $this->assertNull($uri->subdomain());
+
+        $uri = Uri::of('http://127.0.0.1:8080');
+        $this->assertNull($uri->subdomain());
+
+        $uri = Uri::of('http://localhost');
+        $this->assertNull($uri->subdomain());
+
+        $uri = Uri::of('http://localhost:3000');
+        $this->assertNull($uri->subdomain());
+
+        $uri = Uri::of('/path/only');
+        $this->assertNull($uri->subdomain());
+
+        $uri = Uri::of('');
+        $this->assertNull($uri->subdomain());
+
+        $uri = Uri::of('https://staging.api.laravel.com');
+        $this->assertEquals('staging', $uri->subdomain());
+
+        $uri = Uri::of('https://test-env.laravel.com');
+        $this->assertEquals('test-env', $uri->subdomain());
+
+        $uri = Uri::of('https://example.co.uk');
+        $this->assertEquals('example', $uri->subdomain());
+    }
+
+    public function test_domain_extraction()
+    {
+        $uri = Uri::of('https://api.laravel.com');
+        $this->assertEquals('laravel.com', $uri->domain());
+
+        $uri = Uri::of('https://www.laravel.com');
+        $this->assertEquals('laravel.com', $uri->domain());
+
+        $uri = Uri::of('https://admin.dashboard.laravel.com');
+        $this->assertEquals('dashboard.laravel.com', $uri->domain());
+
+        $uri = Uri::of('https://laravel.com');
+        $this->assertEquals('laravel.com', $uri->domain());
+
+        $uri = Uri::of('https://example.org');
+        $this->assertEquals('example.org', $uri->domain());
+
+        $uri = Uri::of('https://192.168.1.1');
+        $this->assertNull($uri->domain());
+
+        $uri = Uri::of('http://127.0.0.1:8080');
+        $this->assertNull($uri->domain());
+
+        $uri = Uri::of('http://localhost');
+        $this->assertNull($uri->domain());
+
+        $uri = Uri::of('http://localhost:3000');
+        $this->assertNull($uri->domain());
+
+        $uri = Uri::of('/path/only');
+        $this->assertNull($uri->domain());
+
+        $uri = Uri::of('');
+        $this->assertNull($uri->domain());
+
+        $uri = Uri::of('https://staging.api.laravel.com');
+        $this->assertEquals('api.laravel.com', $uri->domain());
+
+        $uri = Uri::of('https://test-env.example.co.uk');
+        $this->assertEquals('example.co.uk', $uri->domain());
+
+        $uri = Uri::of('https://example.co.uk');
+        $this->assertEquals('co.uk', $uri->domain());
+
+        $uri = Uri::of('https://hostname');
+        $this->assertNull($uri->domain());
+    }
+
     public function test_macroable()
     {
         Uri::macro('myMacro', function () {