Asti or Asti Spumante is a white sparkling wine produced in an area to the south of the town of Asti in Piedmont, Italy. Made from the Moscato Bianco grape, it is sweet and low in alcohol, and often drunk with dessert. It retains its sweetness through a complex filtration process. Another wine called Moscato d'Asti is made in the same region from the same grape, but produced by another technique which differentiates it from Asti.
The production zone is located mostly in the Province of Asti (AT) and partly within the provinces of Cuneo (CN) and Alessandria (AL). The area was first defined in 1932 as comprising the following 45 communes: Acqui Terme (AL), Alice Bel Colle (AL), Asti (AT), Bistagno (AL), Bubbio (AT), Calamandrana (AT), Calosso (AT),Camo (CN), Canelli (AT), Cassinasco (AT), Cassine (AL), Castagnole delle Lanze (AT), Castel Boglione (AT), Castel Rocchero (AT), Castelletto Molina (AL), Castelnuovo Belbo (AT), Castiglione Tinella (CN), Cessole (AT), Coazzolo (AT), Cossano Belbo (CN), Costigliole d'Asti (AT), Fontanile (AT), Grognardo (AL), Incisa Scapaccino (AT), Loazzolo (AT), Mango (CN), Maranzana (AT), Moasca (AT), Mombaruzzo (AT), Monastero Bormida (AT), Montabone (AT), Neive (CN), Neviglie (CN), Nizza Monferrato (AT), Quaranti (AT), Ricaldone (AL), Rocchetta Belbo (CN), San Marzano Oliveto (AT), Santo Stefano Belbo (CN), Sessame (AT), Strevi (AL), Terzo (AL), Treiso (CN), Trezzo Tinella (CN), Vesime (AT) and Visone (AL).