Most cricketing nations have some form of domestic List A competition. The number of overs in List A cricket ranges from forty to sixty overs per side .
The categorization of cricket matches as "List A" is not endorsed by the International Cricket Council, but one-day matches can never be regarded as first class. The Association of Cricket Historians and Statisticians created this category for the purpose of providing an equivalent to first-class cricket, to allow the generation of career records and statistics for comparable one-day matches. Only the more important one-day competitions in each country, plus matches against a touring Test team, are included.
Matches that qualify as List A:
One-day Internationals (ODIs)
Other international matches
Premier one-day tournaments in each country
Official matches of a touring Test team against main first-class teams
Matches that do not qualify as List A:
World Cup warm-up matches
Other Tourist matches (for example, against first-class teams that are not part of the main domestic first-class competition, such as universities)
Festival and friendly matches
External link
Explanation from the Association of Cricket Statisticians and Historians (http://www.cricinfo.com/link_to_database/SOCIETIES/ENG/ACS/ARTICLES/LIMITED_OVER_A-STATUS.html)