Communities We Serve The American Red Cross of Cape Cod and the Islands serves all cites in Barnstable County, Nantucket and Martha's Vineyard.  If you would like to contact your local Cape Cod and the Islands Chapter of the American Red Cross: General Phone (508) 775-1540. If you live north of Cape Cod, please call the Massachusetts Bay Chapter of the American Red Cross at (800) 564-1234 or (617) 274-5200.