| | | Description | MSA Citation |
| | Details | Allegany-1, Barton, Cumberland A-O | T4456-1 |
| | Details | Allegany-2, Cumberland P-Z, numbered streets & alleys | T4456-2 |
| | Details | Allegany-3, Frostburg, Lonaconing, Midland, Luke, Westernport | T4456-3 |
| | Details | Anne Arundel-1, Annapolis, Highland Beach | T4456-4 |
| | Details | Calvert-1, Chesapeake Beach & North Beach | T4456-5 |
| | Details | Caroline-1, Denton, Federalsburg, Goldsboro, Greensboro, Henderson, Hillsboro, Marydel, Preston, Ridgley, Templeville | T4456-6 |
| | Details | Carroll-1, Hampstead, Sykesville, Manchester, New Windsor, Mt. Airy, Taneytown | T4456-7 |
| | Details | Carroll-2, Union Bridge, Westminster | T4456-8 |
| | Details | Cecil-1, Cecilton, North East, Charlestown, Perryville, Chesapeake City, Port Deposit, Elkton, Rising Sun | T4456-9 |
| | Details | Charles-1, Indian Head, LaPlata | T4456-10 |
| | Details | Dorchester-1, no title | T4456-11 |
| | Details | Frederick-1, Brunswick, Myersville, Burkittsville, New Market, Emmitsburg, Rosemont, Middletown, Thurmont, Mt. Airy, Walkersville, Woodsboro | T4456-12 |
| | Details | Frederick-2, no title | T4456-13 |
| | Details | Garrett-1, Accident, Kitzmiller, Deer Park, Loch Lynn Heights, Friendsville, Mtn. Lake Park, Grantsville, Oakland | T4456-14 |
| | Details | Harford-1, Aberdeen | T4456-15 |
| | Details | Harford-2, Bel Air, Havre de Grace | T4456-16 |
| | Details | Kent-1, Betterton, Galena, Chestertown, Millington, Rock Hall | T4456-17 |
| | Details | Montgomery-1, Barnesville, Brookville, Chevy Chase III, Town of Chevy Chase, Chevy Chase V, Chevy Chase View, Chevy Chase Village, Drummond, Garrett Park, Glen Echo, Kensington, Friendship Heights, Laytonsville | T4456-18 |
| | Details | Montgomery-Martins Additions, North Chevy Chase, Oakmont, Poolesville, Somerset, Takoma Park, Washington Grove | T4456-19 |
| | Details | Montgomery-3, Rockville | T4456-20 |
| | Details | Montgomery-4, Rockville | T4456-21 |
| | Details | Montgomery-5 Gaithersburg | T4456-22 |
| | Details | Prince George's-1, Berwyn Heights, Bladensburg | T4456-23 |
| | Details | Prince George's-2, Bowie A-E | T4456-24 |
| | Details | Prince George's-3, Bowie F-M | T4456-25 |
| | Details | Prince George's-4, Bowie N-R | T4456-26 |
| | Details | Prince George's-5, Bowie S-Z | T4456-27 |
| | Details | Prince George's-6, Brentwood , Cheverly, Capital Heights, College Park | T4456-28 |
| | Details | Prince George's-7, Colmar Manor, Cottage City, District Heights, Eagle Harbor, Edmonson, Fairmont Heights, Forest Heights, Glenarden | T4456-29 |
| | Details | Prince George's-8, Greenbelt, Hyattsville, Landover Hills | T4456-30 |
| | Details | Prince George's-9, Laurel, Mt. Rainer, Morningside, New Carrolton | T4456-31 |
| | Details | Prince George's-10, North Brentwood, Riverdale Park, Seat Pleasant, University Park, Upper Marlboro | T4456-32 |
| | Details | Queen Anne's-1, Barclay, Centreville, Church Hill, Millington, Queen Anne, Queenstown, Sudlersville, Templeville | T4456-33 |
| | Details | St. Mary's-1, Leonardtown | T4456-34 |
| | Details | Somerset-1, Crisfield, Princess Anne | T4456-35 |
| | Details | Talbot-1, St. Michaels, Oxford, Easton, Queen Anne's, Trappe | T4456-36 |
| | Details | Washington-1, Boonsboro, Clear Spring, Funkstown, Hancock, Keedysville, Sharpsburg, Smithsburg, Williamsport | T4456-37 |
| | Details | Washington-2, Hagerstown | T4456-38 |
| | Details | Washington-3, Hagerstown Alleys | T4456-39 |
| | Details | Wicomico-1, Delmar, Fruitland, Hebron, Mardela Springs, Pittsville, Sharptown, Willard | T4456-40 |
| | Details | Wicomico-2, Salisbury | T4456-41 |
| | Details | Worcester-1, Berlin, Ocean City, Pocomoke City, Snow Hill | T4456-42 |
| | Details | Baltimore City-1, A-L | T4456-43 |
| | Details | Baltimore City-2, M-Z | T4456-44 |
| | Details | Baltimore City-3, State Roads | T4456-45 |