---
title: "Default Subkey | Microsoft Docs"
ms.custom: ""
ms.date: "01/19/2017"
ms.prod: sql
ms.prod_service: connectivity
ms.reviewer: ""
ms.technology: connectivity
ms.topic: conceptual
helpviewer_keywords: 
  - "default subkey [ODBC]"
  - "registry entries for data sources [ODBC], default subkey"
  - "subkeys [ODBC], default subkey"
ms.assetid: a2259db8-feb7-4f0a-afc8-88e235d86be7
author: David-Engel
ms.author: v-daenge
---
# Default Subkey
The registry may specify a default data source with the Default subkey. This subkey is a special case of a data source specification subkey and has the same values as any other data source specification subkey. The only difference is that it is not listed as a value under the ODBC Data Sources subkey.