listed by City in Worcester, County, MA
| Ashburnham | Athol | Auburn |
| Baldwinville | Barre | Berlin |
| Blackstone | Bolton | Boylston |
| Brookfield | Charlton | Charlton City |
| Charlton Depot | Cherry Valley | Clinton |
| Douglas | Dudley | East Brookfield |
| East Princeton | East Templeton | Fayville |
| Fiskdale | Fitchburg | Gardner |
| Gilbertville | Grafton | Hardwick |
| Harvard | Holden | Hopedale |
| Hubbardston | Jefferson | Lancaster |
| Leicester | Leominster | Linwood |
| Lunenburg | Manchaug | Mendon |
| Milford | Millbury | Millville |
| New Braintree | North Brookfield | North Grafton |
| North Oxford | North Uxbridge | Northborough |
| Northbridge | Oakham | Oxford |
| Paxton | Petersham | Princeton |
| Rochdale | Royalston | Rutland |
| Shrewsbury | South Barre | South Grafton |
| South Lancaster | Southborough | Southbridge |
| Spencer | Sterling | Still River |
| Sturbridge | Sutton | Templeton |
| Upton | Uxbridge | Warren |
| Webster | West Boylston | West Brookfield |
| West Millbury | West Warren | Westborough |
| Westminster | Wheelwright | Whitinsville |
| Winchendon | Winchendon Springs | Worcester |
listed by Zip codes in Worcester, County, MA
| 1005 | 1031 | 1037 |
| 1068 | 1074 | 1083 |
| 1092 | 1094 | 1331 |
| 1366 | 1368 | 1420 |
| 1430 | 1436 | 1438 |
| 1440 | 1441 | 1451 |
| 1452 | 1453 | 1462 |
| 1467 | 1468 | 1473 |
| 1475 | 1477 | 1501 |
| 1503 | 1504 | 1505 |
| 1506 | 1507 | 1508 |
| 1509 | 1510 | 1515 |
| 1516 | 1517 | 1518 |
| 1519 | 1520 | 1522 |
| 1523 | 1524 | 1525 |
| 1527 | 1529 | 1531 |
| 1532 | 1534 | 1535 |
| 1536 | 1537 | 1538 |
| 1540 | 1541 | 1542 |
| 1543 | 1545 | 1546 |
| 1550 | 1560 | 1561 |
| 1562 | 1564 | 1566 |
| 1568 | 1569 | 1570 |
| 1571 | 1580 | 1581 |
| 1582 | 1583 | 1585 |
| 1586 | 1588 | 1590 |
| 1601 | 1602 | 1603 |
| 1604 | 1605 | 1606 |
| 1607 | 1608 | 1609 |
| 1610 | 1611 | 1612 |
| 1613 | 1614 | 1615 |
| 1653 | 1654 | 1655 |
| 1740 | 1745 | 1747 |
| 1756 | 1772 |
MassHouseWash Service area
listed by City in Middlesex County, MA
| Middlesex County | Lexington | Shirley |
| Acton | Lincoln | Somerville |
| Arlington | Littleton | Stoneham |
| Arlington Heights | Lowell | Stow |
| Ashby | Malden | Sudbury |
| Ashland | Marlborough | Tewksbury |
| Auburndale | Maynard | Townsend |
| Ayer | Medford | Tyngsboro |
| Bedford | Melrose | Village Of Nagog Woods |
| Belmont | Natick | Waban |
| Billerica | New Town | Wakefield |
| Boxborough | Newton | Waltham |
| Burlington | Newton Center | Watertown |
| Cambridge | Newton Highlands | Waverley |
| Carlisle | Newton Lower Falls | Wayland |
| Chelmsford | Newton Upper Falls | West Groton |
| Concord | Newtonville | West Medford |
| Dracut | Nonantum | West Newton |
| Dunstable | North Billerica | West Townsend |
| Everett | North Chelmsford | Westford |
| Framingham | North Reading | Weston |
| Groton | Nutting Lake | Wilmington |
| Hanscom Afb | Pepperell | Winchester |
| Holliston | Pinehurst | Woburn |
| Hopkinton | Reading | Woodville |
| Hudson | Sherborn |
MassHouseWash Service area
listed by Zip codes in Middlesex County, MA
| 1431 | 1776 | 2144 |
| 1432 | 1778 | 2145 |
| 1434 | 1801 | 2148 |
| 1450 | 1803 | 2149 |
| 1460 | 1821 | 2155 |
| 1463 | 1824 | 2176 |
| 1464 | 1826 | 2180 |
| 1469 | 1827 | 2420 |
| 1474 | 1850 | 2421 |
| 1701 | 1851 | 2451 |
| 1702 | 1852 | 2452 |
| 1718 | 1854 | 2453 |
| 1719 | 1862 | 2458 |
| 1720 | 1863 | 2459 |
| 1721 | 1864 | 2460 |
| 1730 | 1867 | 2461 |
| 1731 | 1876 | 2462 |
| 1741 | 1879 | 2464 |
| 1742 | 1880 | 2465 |
| 1746 | 1886 | 2466 |
| 1748 | 1887 | 2467 |
| 1749 | 1890 | 2468 |
| 1752 | 2138 | 2472 |
| 1754 | 2139 | 2474 |
| 1760 | 2140 | 2476 |
| 1770 | 2141 | 2478 |
| 1773 | 2142 | 2493 |
| 1775 | 2143 |
MassHouseWash Service area
listed by City in Essex County, MA
| Amesbury | Ipswich | Peabody |
| Andover | Lawrence | Prides Crossing |
| Beverly | Lynn | Rockport |
| Boxford | Lynnfield | Rowley |
| Byfield | Manchester | Salem |
| Danvers | Marblehead | Salisbury |
| Essex | Merrimac | Saugus |
| Georgetown | Methuen | South Hamilton |
| Gloucester | Middleton | Swampscott |
| Groveland | Nahant | Topsfield |
| Hamilton | Newbury | Wenham |
| Hathorne | Newburyport | West Boxford |
| Haverhill | North Andover | West Newbury |
MassHouseWash Service area
listed by Zip codes in Essex County, MA
| 1810 | 1904 | 1944 |
| 1830 | 1905 | 1945 |
| 1832 | 1906 | 1949 |
| 1833 | 1907 | 1950 |
| 1834 | 1908 | 1951 |
| 1835 | 1913 | 1952 |
| 1840 | 1915 | 1960 |
| 1841 | 1921 | 1966 |
| 1843 | 1922 | 1969 |
| 1844 | 1923 | 1970 |
| 1845 | 1929 | 1982 |
| 1860 | 1930 | 1983 |
| 1901 | 1938 | 1984 |
| 1902 | 1940 | 1985 |
MassHouseWash Service area
listed by City in Hampden County, MA
| Agawam | Holland | Springfield |
| Blandford | Holyoke | Thorndike |
| Bondsville | Indian Orchard | Three Rivers |
| Brimfield | Longmeadow | Wales |
| Chicopee | Ludlow | West Springfield |
| East Longmeadow | Monson | Westfield |
| Feeding Hills | Palmer | Wilbraham |
| Granville | Russell | Woronoco |
| Hampden | Southwick |
MassHouseWash Service area
listed by Zip Codes in Hampden County, MA
| 1001 | 1057 | 1106 |
| 1008 | 1069 | 1107 |
| 1010 | 1071 | 1108 |
| 1011 | 1075 | 1109 |
| 1013 | 1077 | 1118 |
| 1020 | 1080 | 1119 |
| 1022 | 1081 | 1128 |
| 1028 | 1085 | 1129 |
| 1030 | 1089 | 1144 |
| 1034 | 1095 | 1151 |
| 1036 | 1103 | 1152 |
| 1040 | 1104 | 1223 |
| 1056 | 1105 | 1521 |