| Code | Site | Code | Site | Code | Site | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| MCC | 4 Aces Bridge Club LLC | MLT | ??? | MMD | Bridge Club of Madison | ||||||
| MCR | Chicago Duplicate Bridge | MDR | Door County Bridge Club | MFV | Fox Valley Bridge Club | ||||||
| MLJ | New Lenox-Joliet DBC | MOO | Oconomowoc Bridge Club | MTT | Tree Towns DBC | ||||||
| MZ9 | D13 STaC | MC2 | Chicago Regional | MC1 | Crystal Lake Regional | ||||||
| MX2 | D13 GNT | MX1 | D13 NAP | ME1 | Eau Claire Regional | ||||||
| MF1 | Fitchburg Regional | MG3 | Glenview Regional | MG2 | Green Bay Regional | ||||||
| MH1 | Harris Regional | MG1 | Lake Geneva Regional | MM1 | Milwaukee Regional | ||||||
| MN1 | Northbrook Regional | MR1 | Rosemont Regional | MS2 | Schaumburg Regional | ||||||
| MS1 | St Charles Regional | MC0 | Chicago Nationals |