Greek basketball league system

The Greek basketball league system is a number of interconnected competitions for professional basketball clubs in Greece. The system has a hierarchical format with a promotion and relegation system between competitions at different levels. There are several different competitions in the system. The highest level competitions are the nationwide competitions: the Greek Basket League, the Greek A2 Basket League, the Greek B Basket League, and the Greek C Basket League. Those competitions are followed by the regional level competitions: the A1, the A2, the B, the C, and/or the C1, and the C2 categories.

Competitions

League
Greek Basket League (A1) National professional 1st division (All clubs must be legally licensed, registered, and recognized as fully professional clubs.) (14 teams)
Greek A2 Basket League National professional 2nd division (Clubs don't have to be legally licensed as professional entities. Some are and some are not.) (18 teams)
Greek B Basket League National professional 3rd division (58 teams) (2nd-tier from 1961–1986)^{[citation needed]}
Greek C Basket League National amateur 4th division (66 teams)
ESKAH, ESKAK, EKASKENOP, EKASK, ESKASE, T.E. Chiou, T.E. Lesvou, T.E. Samou, T.E. Dodekanisou, E.S.K. Kikladon, ESKA, ESKANA, ESKABDE, ESKATH, EKASKEM, EKASDYM, EKASAMATH, EKASX A1 Category Local 1st division
ESKAH, ESKAK, EKASKENOP, EKASK, ESKASE, T.E. Chiou, T.E. Lesvou, T.E. Samou, T.E. Dodekanisou, E.S.K. Kikladon, ESKA, ESKANA, ESKABDE, ESKATH, EKASKEM, EKASDYM, EKASAMATH, EKASX A2 Category Local 2nd division
ESKAH, ESKAK, EKASKENOP, EKASK, ESKASE, T.E. Chiou, T.E. Lesvou, T.E. Samou, T.E. Dodekanisou, E.S.K. Kikladon, ESKA, ESKANA, ESKABDE, ESKATH, EKASKEM, EKASDYM, EKASAMATH, EKASX B Category Local 3rd division
ESKAH, ESKAK, EKASKENOP, EKASK, ESKASE, T.E. Chiou, T.E. Lesvou, T.E. Samou, T.E. Dodekanisou, E.S.K. Kikladon, ESKA, ESKANA, ESKABDE, ESKATH, EKASKEM, EKASDYM, EKASAMATH, EKASX C or C1 Category Local 4th division
ESKAH^[1] C2 Category Local 5th division