| Code | | Site | | Code | | Site | | Code | | Site |
| YAB | | Amesbury Duplicate BC | |
YAV | | Andover DBC | |
YB7 | | Barnstable Sectional | |
| YBM | | Belmont Duplicate Bridge Club | |
YBS | | The Bridge Spot | |
YC7 | | Chatham Sectional | |
| YCH | | ??? | |
YCS | | Classy Seniors DBC | |
YCT | | ??? | |
| YDM | | Dartmouth BC | |
YDW | | Dedham Invitational | |
YDY | | D-Y Senior Citizens DBC | |
| YEC | | New England Chinese Bridge | |
YEH | | Eastward Ho! BC | |
YET | | Edgartown Bridge Club | |
| YF5 | | Falmouth Sectional | |
YFM | | Family Friendly Bridge Club | |
YFX | | Fox Hill Village Bridge Club | |
| YGC | | Essex Country Club | |
YGI | | Great Island Duplicate Bridge | |
YH7 | | Hyannis Sectional | |
| YHY | | Hyannis Port Club | |
YIH | | Hamilton DBC | |
YKY | | Kathy's Bridge Club | |
| YLC | | Longwood Cricket Club | |
YMD | | MIT/DL Bridge Club | |
YMF | | Marshfield Senior Center | |
| YMG | | ??? | |
YMW | | Metrowest Bridge | |
YN5 | | New Castle Sectional | |
| YN7 | | Newton Sectional | |
YNB | | Nantucket Bridge Club | |
YNN | | Bay State Bridge Club | |
| YNO | | North Hill Bridge Club | |
YOH | | Oyster Harbors Club | |
YPT | | Puritan Bridge Club | |
| YRH | | Monomoy Bridge Club | |
YS4 | | Sandwich Sectional | |
YSD | | Dennis DBC | |
| YSM | | Saltmarsh DBC | |
YTB | | ??? | |
YUC | | Upper Cape Bridge Club | |
| YW4 | | Watertown Sectional | |
YW6 | | Woburn Sectional | |
YW8 | | Westwood Sectional | |
| YWC | | The DBC of Winchester | |
YWL | | Willowbend Duplicate Bridge | |
YWO | | ??? | |
| YWW | | Westwood DBC | |