 European zone messages are stored in the Netherlands and in a part of the Switzerland operating center; Trans-Atlantic zone messages are stored in the United States and in a part of the Switzerland operating center that is segregated from the European zone messages.Countries outside of Europe were by default allocated to the Trans-Atlantic zone but could choose to have their messages stored in the European zone.SWIFT moved to its current IP network infrastructure, known as SWIFTNet, from 2001 to 2005, providing a total replacement of the previous X.25 infrastructure.