Northamptonshire have been placed in a tough group for the 2013 Clydesdale Bank 40.
The County, who registered a single victory in the competition in the 2012 campaign, have been placed in Group A with the beaten finalists Warwickshire and semi-finalists Sussex.
They will also face Nottinghamshire, Kent, Worcestershire and the Netherlands.
Champions Hampshire have been drawn with 2011 winners Surrey as well as the other semi-finalist from this year Lancashire.
Group B will also include Durham, Essex, Derbyshire and the Scottish Saltires.
Group C will consist of the Unicorns, Glamorgan, Leicestershire, Yorkshire, Gloucestershire, Middlesex and Somerset.