Division I. A third, Lindenwood moved up in 2022. Conferences Central States Collegiate Hockey League (CSCHL) College Hockey Mid-America (CHMA) Eastern Collegiate Hockey Association (ECHA) Eastern States Collegiate Hockey League (ESCHL) Great Lakes Collegiate Hockey League (GLCHL) Midwest College Hockey (MCH) Northeast Collegiate Hockey League (NECHL) Western Collegiate Hockey League (WCHL) Wolverine Hoosier Athletic Conference (WHAC) ACHA Men's Division 2 is currently the largest division in the ACHA, it includes approximately 200 teams in 12 conferences and Independents. These teams are divided into four Regions (Central, Northeast, Southeast and West). A total of 16 teams qualify for the National Tournament, four from each region. Each month of the season a ranking of the top 15 teams in region is released. After the final ranking in February the top two seeds from each region earn an automatic berth into Nationals. Seeds 3–10 compete in their respective single-elimination Regional Tournaments, with the two teams who win both of their games also earning a Nationals berth. The National Tournament is a pool play format with the winners of each pool advancing to the semifinals. The semifinal match-ups are the winner of Pool A vs. Pool C and Pool B vs. Pool D. Conferences Atlantic Coast Collegiate Hockey League (ACCHL) Big Mountain Hockey Conference (BMHC) Colonial States College Hockey Conference (CSCHC) (The Colonial) Mid-American Collegiate Hockey Association (MACHA) Mid-Atlantic Collegiate Hockey Association (MACH) Mountain West Collegiate Hockey League (MWCHL) Northeast Collegiate Hockey Association (NECHA) Northern Collegiate Hockey League (NCHL) Pacific 8 Intercollegiate Hockey Conference (PAC-8) Pacific Collegiate Hockey Association (PCHA) Super East Collegiate Hockey League (SECHL) Texas Collegiate Hockey Conference (TCHC) Tri-State Collegiate Hockey League (TSCHL) Western Collegiate Club Hockey Association (WCCHA) West Coast Hockey Conference (WCHC) ACHA Men's Division 3 consists of approximately 140 teams in nine conferences and Independents. These teams are also divided into four Regions (Atlantic, North, Pacific and South). A total of 16 teams qualify for the National Tournament in the same manner as Division 2. The National Tournament has also been conducted in the same manner as Division 2 since 2010. Before that it was single elimination and every team played four games. The one exception is the semifinals match-ups. The winner of Pool A plays the winner of Pool B and the winner of Pool C plays the winner of Pool D. Conferences Blue Ridge Hockey Conference (BRHC) College Hockey East (CHE) Indiana Collegiate Hockey Conference (ICHC)