The 'P' in ISWN-P stands for Producer, and this 10-digit code (CCC - RR - PP.PPP) describes the company that produces the wine to market. It can represent either:

a. the company that manages the vinification process, and/or
b. the company that brands and sells the wine.

Examples

ISWN-P	Winery Name	Location
040.03-00.030	Weingut Alois Kracher	Austria
152.00-00.017	Vina Concha Y Toro	Chile
250.02-02.330	Domaine Louis Latour	France, Burgundy
380.11-00.946	Visconti Cassinis Ravizza	Italy, Piemonte
276.00-00.570	Staatsweingut Meersburg	Germany
710.08-00.245	Zandvliet Estate	South Africa
724.11-00.340	Bodegas Marques de Murrieta	Spain, La Rioja
840-05.00.910	E&J Gallo Winery	US, California