Wikipedia:WikiProject U.S. Roads/Massachusetts/List of 1920s numbers

The main source for this list is the 1926 maps at [1].

• Route 1, RI to NH via Boston
  • Became U.S. Route 1 in 1926
• Route 1A, Everett to NH via Lynn, Salem, Ipswich, Newburyport
  • Now Route 1A
• Route 2, CT to VT via Springfield, Greenfield
  • Became U.S. Route 5 in 1926
• Route 3, RI to Provincetown via Fall River, New Bedford, Falmouth
  • Became U.S. Route 6, Route 28, U.S. Route 6 in 1926
• Route 4, CT to VT via Pittsfield
  • Became unnumbered? (now Route 41), Route 17 (now Route 23), U.S. Route 7 in 1926
• Route 5, NY to Boston via Pittsfield, Springfield, Worcester
  • Became U.S. Route 20 in 1926; now U.S. Route 20, Route 67, Route 9, U.S. Route 20
• Route 6, Orleans to NH via Plymouth, Boston, Lowell
  • Became U.S. Route 6, Route 3, U.S. Route 3 in 1926
• Route 6A, Kingston to Quincy
  • Became Route 3A in 1926
• Route 6B, Winchester to Lowell
  • Became Route 3B in 1926; now Route 38
• Route 7, NY to Boston via Williamstown, Greenfield, Fitchburg
  • Became Route 2 in 1926; now Route 43 west of Williamstown
    • Renumbered because of U.S. Route 7
• Route 8, CT to VT via Becket, Adams
  • Now Route 8
• Route 10, CT to NH via Northampton, Greenfield
  • Now Route 10
• Route 12, CT to NH via Worcester, Fitchburg
  • Now Route 12
• Route 17, NY to CT via Great Barrington
  • Now Route 23, U.S. Route 7
• Route 28, Wareham to NH via Middleboro, Boston, Lawrence
  • Extended along Route 3 to Orleans in 1926; now Route 28
• Route 32, CT to NH via Brimfield, Ware, Barre, [there seems to be a gap here], Baldwinsville
  • Now Route 19, U.S. Route 20, Route 32, [gap], U.S. Route 202

• Route 101, RI to Plymouth via Taunton, Middleboro
  • Now U.S. Route 44
• Route 102, Taunton to Weymouth via Bridgewater, Abington
  • Now Route 104, Route 18
• Route 103, RI to Fall River
  • Now Route 103
• Route 104, north of Clifford to Middleboro
  • Now Route 18, Route 105
• Route 105, south of Lakeville to Lakeville
  • Now Route 105
• Route 106, north of Raynham to West Bridgewater
  • Now Route 106
• Route 107, Chelsea to Salem
  • Now Route 107
• Route 108, Fitchburg to Ashby
  • Now Route 31
    • Renumbered to match NH
• Route 109, Pittsfield to West Brookfield via Northampton
  • Now Route 9
• Route 109A, Dalton to Williamsburg
  • Now Route 8, Route 143
• Route 110, Boylston to NH via Clinton, Lowell, Lawrence, Amesbury
  • Now Route 110, Main Street
• Route 111, Harvard to Concord
  • Now Route 111
• Route 112, Huntington to Shelburne Falls via Worthington
  • Now Route 112
• Route 113, east of Townsend to Tyngsborough
  • Now Route 113
• Route 114, Salem to Lawrence
  • Now Route 114
• Route 115, North Grafton to Boston via Westboro, Framingham Center, Brookline
  • Now Route 30, Route 9
• Route 116, Chicopee to Ashfield via Amherst, South Deerfield
  • Now Route 116
• Route 117, Leominster to Waltham via Maynard
  • Now Route 117
• Route 118, Great Barrington to West Pittsfield via West Stockbridge
  • Now Route 41
    • Renumbered to match CT
• Route 119, NH to Littleton via Ashby, Groton
  • Now Route 119
• Route 120, Holden to west of Fitchburg
  • Now Route 31
    • Renumbered to match NH
• Route 121, Ipswich to Gloucester
  • Now Route 133
    • Renumbered as an extension of Route 133
• Route 122, RI to Athol via Worcester, Barre
  • Now Route 122, Route 32
• Route 122A, Worcester to West Rutland
  • Now Route 122A
• Route 123, South Attleboro to Greenbush via Brockton
  • Now Route 123
• Route 124, Southbridge to West Auburn
  • Now Route 169, U.S. Route 20
    • Renumbered to match CT
• Route 125, Lawrence to Newburyport via Haverhill
  • Now Route 125, Route 113
• Route 126, Uxbridge to Chelmsford via Milford, Framingham, Concord
  • Now Route 16, Route 126, Edgell Road, Concord Road, Sudbury Road, Lowell Road, Concord Street, Boston Road, Route 4
• Route 127, Beverly to Rockport via Gloucester
  • Now Route 127
• Route 128, Milton to Salem via Dedham, Needham, Waltham, Lexington, Woburn, Wakefield
  • Now Route 128
• Route 129, Wilmington to Lynn
  • Now Route 129
• Route 130, Mashpee to Sandwich
  • Now Route 130
• Route 131, Brimfield to CT
  • Now U.S. Route 20, Route 131
• Route 132, Hyannis to Barnstable
  • Now Barnstable Road, Hyannis Road
• Route 133, Groveland to Rowley
  • Now Route 97, Route 133
• Route 134, West Dennis to East Dennis
  • Now Route 134
• Route 135, Framingham? to Dedham
  • Now Route 135
• Route 136, RI to North Swansea (not on either 1926 map)
  • Now Route 136
• Route 137, Milford to Dedham via Millis
  • Now Route 109
• Route 138, RI to Boston via Fall River, Taunton, Stoughton
  • Now Route 138
• Route 139, South Hadley Falls to Belchertown
  • Now U.S. Route 202
• Route 140, New Bedford to Grafton via Taunton, Foxboro, Milford
  • Now Route 140
• Route 141, Stockbridge to East Lee
  • Now Route 102
• Route 142, RI to Wrentham (not on either 1926 map)
  • Now Route 121
    • Renumbered to match RI