By state:
| Maryland | |||
| 20601-04 | Waldorf | 20854 | Potomac |
| 20607 | Accokeek | 20855-58 | Rockville |
| 20611 | Bel Alton | 20859 | Potomac |
| 20613 | Brandywine | 20860 | Sandy Springs |
| 20646 | LaPlata | 20861 | Ashton |
| 20701 | Annapolis Junction | 20866 | Burtonsville |
| 20703 | Lanham | 20868 | Spencerville |
| 20704-05 | Beltsville | 20871 | Clarksburg |
| 20706 | Lanham-Seabrook | 20872 | Damascus |
| 20707-08 | Laurel | 20874-75 | Germantown |
| 20710 | Bladensburg | 20876-79 | Gaithersburg |
| 20712 | Mount Rainer | 20880 | Washington Grove |
| 20715-16 | Bowie | 20882 | Gaithersburg |
| 20717 | Mitchellsville | 20886 | Gaithersburg |
| 20718-21 | Bowie | 20889-94 | Bethesda |
| 20722 | Brentwood | 20895 | Kensington |
| 20723-26 | Laurel | 20896 | Garrett Park |
| 20731 | Capitol Heights | 20898-99 | Gaithersburg |
| 20735 | Clinton | 20900-11 | Silver Spring |
| 20737-38 | Riverdale | 20912-13 | Takoma Park |
| 20740-42 | College Park | 20914-18 | Silver Spring |
| 20743 | Seat Pleasant | 21012 | Arnold |
| 20744 | Fort Washington | 21014 | Bel Air |
| 20745 | Oxon Hill | 21030-31 | Hunt Valley |
| 20746 | Camp Springs | 21040 | Edgewood |
| 20747 | Forestville | 21041-43 | Ellicott City |
| 20748 | Marlow Heights | 21044-46 | Columbia |
| 20752 | Suitland | 21047 | Fallston |
| 20753 | District Heights | 21054 | Gambrills |
| 20755 | Ft. Meade | 21060-62 | Glen Burnie |
| 20757 | Temple Hills | 21075 | Elkridge |
| 20759 | Fulton | 21076 | Hanover |
| 20763 | Savage | 21077 | Harmons |
| 20765-68 | Greenbelt | 21090 | Linthicum Heights |
| 20769 | Glenn Dale | 21093-94 | Lutherville/Timon. |
| 20770-71 | Greenbelt | 21108 | Millersville |
| 20772-73 | Upper Marlboro | 21114 | Crofton |
| 20774 | Largo | 21117 | Owings Mill |
| 20777 | Highland | 21122 | Pasadena |
| 20780-89 | Hyattsville | 21128 | Perry Hall |
| 20790-91 | Capitol Heights | 21133 | Randallstown |
| 20794 | Jessup | 21136 | Reisterstown |
| 20799 | Capitol Heights | 21139 | Riderwood |
| 20812 | Glen Echo | 21144 | Severn |
| 20813-14 | Bethesda | 21146 | Severna Park |
| 20815 | Chevy Chase | 21152 | Sparks / Glencoe |
| 20816-17 | Bethesda | 21157 | Westminster |
| 20818 | Cabin John | 21162 | White Marsh |
| 20824 | Bethesda | 21201-03 | Baltimore |
| 20825 | Chevy Chase | 21204-99 | Baltimore |
| 20826-27 | Bethesda | 21400-04 | Annapolis |
| 20832 | Olney | 21701-04 | Frederick |
| 20833 | Brookville | 21738 | Glenwood |
| 20837 | Poolesville | 21784 | Sykesville |
| 20847-53 | Rockville | ||
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| Virginia | |||
| 20108-11 | Manassas | 22026 | Dumfries |
| 20115 | Marshall | 22027 | Vienna |
| 20116 | Marshall | 22030-39 | Fairfax |
| 20117 | Middleburg | 22040-47 | Falls Church |
| 20118 | Middleburg | 22060 | Fort Belvoir |
| 20119 | Catlett | 22066 | Great Falls |
| 20120 | Centreville | 22070 | Herndon |
| 20121-22 | Centreville | 22071 | Herndon |
| 20124 | Clifton | 22079 | Lorton |
| 20132 | Purcellville | 22081 | Merrifield |
| 20136 | Bristow | 22082 | Merrifield |
| 20147-48 | Ashburn | 22090-91 | Reston |
| 20151 | Chantilly | 22092 | Herndon |
| 20152 | Chantilly | 22094 | Reston |
| 20153 | Chantilly | 22095 | Herndon |
| 20155 | Gainesville | 22096 | Reston |
| 20156 | Gainesville | 22101-09 | McLean |
| 20163 | Sterling | 22116 | Merrifield |
| 20164 | Sterling | 22118 | Merrifield |
| 20165 | Sterling | 22119 | Merrifield |
| 20166 | Sterling | 22120 | Merrifield |
| 20167 | Sterling | 22121 | Mount Vernon |
| 20168 | Haymarket | 22122 | Centreville |
| 20169 | Haymarket | 22122 | Newington |
| 20170 | Herndon | 22124 | Oakton |
| 20172 | Herndon | 22125 | Ocoquan |
| 20175 | Leesburg | 22134 | Quantico |
| 20176 | Leesburg | 22135 | Quantico |
| 20181 | Nokesville | 22150-61 | Springfield |
| 20182 | Nokesville | 22180 | Vienna |
| 20184 | Upperville | 22181 | Vienna |
| 20186 | Warrenton | 22182 | Vienna |
| 20187 | Warrenton | 22183 | Vienna |
| 20188 | Warrenton | 22184 | Vienna |
| 20190-96 | Reston | 22185 | Vienna |
| 20198 | The Plains | 22190-94 | Woodbridge |
| 22003 | Annandale | 22201-46 | Arlington |
| 22009 | Burke | 22301-36 | Alexandria |
| 22015 | Burke | 22554 | Stafford |
| 22015 | Potomac Falls | 22555-56 | Stafford |
| 22020 | Centreville | 22611 | Berryville |
| 22021-22 | Chantilly | 22712 | Bealeton |
| 22025 | Dumfries | 22728 | Midland |
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| Washington DC | |||
| 20001 | Washington DC | 20200-99 | Washington DC |
| 20002-03 | Washington DC | 20301-30 | Washington DC |
| 20004-06 | Washington DC | 20332-35 | Washington DC |
| 20007-35 | Washington DC | 20336 | Bolling AFB |
| 20036-37 | Washington DC | 20337-99 | Washington DC |
| 20038-40 | Washington DC | 20400-99 | Washington DC |
| 20041 | Dulles Airport | 20500 | White House |
| 20042-49 | Washington DC | 20501-09 | Washington DC |
| 20050 | Pentagon | 20510 | Washington DC |
| 20051-87 | Washington DC | 20511-14 | Washington DC |
| 20088 | Friendship Heights | 20515 | Washington DC |
| 20089-99 | Washington DC | 20516-99 | Washington DC |
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