| Zip code | Name | Area Code(s) |
| 21001 Aberdeen (410/443/667) |
| 21005 Aber Prov Grd (410/443/667) |
| 21005 Aberdeen Proving Ground (410/443/667) |
| 21005 APG (410/443/667) |
| 21009 Abingdon (410/443/667) |
| 21010 Aber Prov Grd (410/443/667) |
| 21010 Aberdeen Proving Ground (410/443/667) |
| 21010 Edgewood Arsenal (410/443/667) |
| 21010 Gunpowder (410/443/667) |
| 21012 Arnold (410/443/667) |
| 21013 Baldwin (410/443/667) |
| 21014 Bel Air (410/443/667) |
| 21015 Bel Air (410/443/667) |
| 21017 Belcamp (410/443/667) |
| 21017 Riverside (410/443/667) |
| 21018 Benson (410/443/667) |
| 21020 Boring (410/443/667) |
| 21022 Brooklandville (410/443/667) |
| 21022 Brooklandvl (410/443/667) |
| 21023 Butler (410/443/667) |
| 21027 Chase (410/443/667) |
| 21028 Churchville (410/443/667) |
| 21029 Clarksville (410/443/667) |
| 21030 Cockeysville (410/443/667) |
| 21030 Cockysvil (410/443/667) |
| 21030 Hunt Valley (410/443/667) |
| 21031 Hunt Valley (410/443/667) |
| 21032 Crownsville (410/443/667) |
| 21034 Darlington (410/443/667) |
| 21035 Davidsonville (410/443/667) |
| 21036 Dayton (410/443/667) |
| 21037 Beverley Bch (410/443/667) |
| 21037 Edgewater (410/443/667) |
| 21037 Edgewater Bch (410/443/667) |
| 21037 Woodland Bch (410/443/667) |
| 21040 Edgewood (410/443/667) |
| 21041 Ellicott (410/443/667) |
| 21041 Ellicott City (410/443/667) |
| 21042 Ellicott (410/443/667) |
| 21042 Ellicott City (410/443/667) |
| 21043 Daniels (410/443/667) |
| 21043 Ellicott (410/443/667) |
| 21043 Ellicott City (410/443/667) |
| 21043 Ilchester (410/443/667) |
| 21043 Oella (410/443/667) |
| 21044 Columbia (410/443/667) |
| 21045 Columbia (410/443/667) |
| 21046 Columbia (410/443/667) |
| 21047 Fallston (410/443/667) |
| 21048 Finksburg (410/443/667) |
| 21048 Patapsco (410/443/667) |
| 21050 Forest Hill (410/443/667) |
| 21051 Fork (410/443/667) |
| 21052 Fort Howard (410/443/667) |
| 21053 Freeland (410/443/667) |
| 21054 Gambrills (410/443/667) |
| 21056 Gibson Island (410/443/667) |
| 21057 Glen Arm (410/443/667) |
| 21060 Glen Burnie (410/443/667) |
| 21060 Glenburnie (410/443/667) |
| 21061 Glen Burnie (410/443/667) |
| 21061 Glenburnie (410/443/667) |
| 21062 Glen Burnie (410/443/667) |
| 21062 Maryland Motor Vehicle Admin (410/443/667) |
| 21065 Cockeysville Hunt Valley (410/443/667) |
| 21065 Cockys Ht Valley (410/443/667) |
| 21065 Hunt Valley (410/443/667) |
| 21065 Huntvalley (410/443/667) |
| 21065 Pdp Group Inc (410/443/667) |
| 21071 Glyndon (410/443/667) |
| 21071 Reisterstown (410/443/667) |
| 21074 Greenmount (410/443/667) |
| 21074 Hampstead (410/443/667) |
| 21075 Elkridge (410/443/667) |
| 21075 Hanover (410/443/667) |
| 21076 Hanover (410/443/667) |
| 21076 Harmans (410/443/667) |
| 21077 Harmans (410/443/667) |
| 21078 Havre de Grace (410/443/667) |
| 21078 Hvre de Grace (410/443/667) |
| 21082 Hydes (410/443/667) |
| 21084 Jarrettsville (410/443/667) |
| 21085 Joppa (410/443/667) |
| 21085 Joppatown (410/443/667) |
| 21085 Joppatowne (410/443/667) |
| 21085 Magnolia (410/443/667) |
| 21087 Bradshaw (410/443/667) |
| 21087 Kingsville (410/443/667) |
| 21088 Lineboro (410/443/667) |
| 21088 Manchester (410/443/667) |
| 21090 Linthicum (410/443/667) |
| 21090 Linthicum Heights (410/443/667) |
| 21092 Long Green (410/443/667) |
| 21093 Lutherville (410/443/667) |
| 21093 Lutherville Timonium (410/443/667) |
| 21093 Luthvle Timon (410/443/667) |
| 21093 Timonium (410/443/667) |
| 21094 Lutherville (410/443/667) |
| 21094 Lutherville Timonium (410/443/667) |
| 21094 Luthvle Timon (410/443/667) |
| 21094 Timonium (410/443/667) |
| 21102 Lineboro (410/443/667) |
| 21102 Manchester (410/443/667) |
| 21102 Millers (410/443/667) |
| 21104 Henryton (410/443/667) |
| 21104 Marriottsville (410/443/667) |
| 21104 Marriottsvl (410/443/667) |
| 21104 Woodstock (410/443/667) |
| 21105 Maryland Line (410/443/667) |
| 21106 Mayo (410/443/667) |
| 21108 Millersville (410/443/667) |
| 21111 Hereford (410/443/667) |
| 21111 Monkton (410/443/667) |
| 21113 Odenton (410/443/667) |
| 21114 Crofton (410/443/667) |
| 21117 Garrison (410/443/667) |
| 21117 Owings Mills (410/443/667) |
| 21120 Bentley Springs (410/443/667) |
| 21120 Parkton (410/443/667) |
| 21122 Lake Shore (410/443/667) |
| 21122 Millersville (410/443/667) |
| 21122 Pasadena (410/443/667) |
| 21122 Riviera Beach (410/443/667) |
| 21123 Lake Shore (410/443/667) |
| 21123 Pasadena (410/443/667) |
| 21123 Riviera Beach (410/443/667) |
| 21128 Perry Hall (410/443/667) |
| 21128 Perryhall (410/443/667) |
| 21130 Perryman (410/443/667) |
| 21131 Jacksonville (410/443/667) |
| 21131 Phoenix (410/443/667) |
| 21132 Pylesville (410/443/667) |
| 21133 Foxridge (410/443/667) |
| 21133 McDonogh Run (410/443/667) |
| 21133 Randallstown (410/443/667) |
| 21136 Glyndon (410/443/667) |
| 21136 Reisterstown (410/443/667) |
| 21139 Riderwood (410/443/667) |
| 21140 Riva (410/443/667) |
| 21144 Severn (410/443/667) |
| 21146 Severna Park (410/443/667) |
| 21150 Simpsonville (410/443/667) |
| 21152 Glencoe (410/443/667) |
| 21152 Sparks (410/443/667) |
| 21152 Sparks Glenco (410/443/667) |
| 21152 Sparks Glencoe (410/443/667) |
| 21153 Stevenson (410/443/667) |
| 21154 Street (410/443/667) |
| 21155 Fowbelsburg (410/443/667) |
| 21155 Upperco (410/443/667) |
| 21156 Upper Falls (410/443/667) |
| 21157 Carrollton (410/443/667) |
| 21157 Westminster (410/443/667) |
| 21158 Westminster (410/443/667) |
| 21160 Cardiff (410/443/667) |
| 21160 Whiteford (410/443/667) |
| 21161 Norrisville (410/443/667) |
| 21161 White Hall (410/443/667) |
| 21162 White Marsh (410/443/667) |
| 21163 Granite (410/443/667) |
| 21163 Henryton (410/443/667) |
| 21163 Woodstock (410/443/667) |
| 21201 Baltimore (410/443/667) |
| 21202 Baltimore (410/443/667) |
| 21202 East Case (410/443/667) |
| 21203 Baltimore (410/443/667) |
| 21204 Baltimore (410/443/667) |
| 21204 Eudowood (410/443/667) |
| 21204 Loch Raven (410/443/667) |
| 21204 Ruxton (410/443/667) |
| 21204 Towson (410/443/667) |
| 21205 Baltimore (410/443/667) |
| 21205 Clifton East End (410/443/667) |
| 21205 East End (410/443/667) |
| 21206 Baltimore (410/443/667) |
| 21206 Raspeburg (410/443/667) |
| 21207 Baltimore (410/443/667) |
| 21207 Gwynn Oak (410/443/667) |
| 21207 Woodlawn (410/443/667) |
| 21208 Baltimore (410/443/667) |
| 21208 Pikesville (410/443/667) |
| 21209 Baltimore (410/443/667) |
| 21209 Mount Washington (410/443/667) |
| 21210 Baltimore (410/443/667) |
| 21210 Roland Park (410/443/667) |
| 21211 Baltimore (410/443/667) |
| 21211 Hampden (410/443/667) |
| 21212 Baltimore (410/443/667) |
| 21212 Govans (410/443/667) |
| 21213 Baltimore (410/443/667) |
| 21213 Clifton (410/443/667) |
| 21213 Clifton East End (410/443/667) |
| 21214 Baltimore (410/443/667) |
| 21214 Hamilton (410/443/667) |
| 21215 Arlington (410/443/667) |
| 21215 Baltimore (410/443/667) |
| 21216 Baltimore (410/443/667) |
| 21216 Walbrook (410/443/667) |
| 21217 Baltimore (410/443/667) |
| 21217 Druid (410/443/667) |
| 21218 Baltimore (410/443/667) |
| 21218 Waverly (410/443/667) |
| 21219 Baltimore (410/443/667) |
| 21219 Dundalk Sparrows Point (410/443/667) |
| 21219 Edgemere (410/443/667) |
| 21219 Sparrows Point (410/443/667) |
| 21220 Baltimore (410/443/667) |
| 21220 Middle River (410/443/667) |
| 21221 Baltimore (410/443/667) |
| 21221 Essex (410/443/667) |
| 21222 Baltimore (410/443/667) |
| 21222 Dundalk (410/443/667) |
| 21222 Dundalk Sparrows Point (410/443/667) |
| 21223 Baltimore (410/443/667) |
| 21223 Franklin (410/443/667) |
| 21224 Baltimore (410/443/667) |
| 21224 Highlandtown (410/443/667) |
| 21225 Baltimore (410/443/667) |
| 21225 Brooklyn (410/443/667) |
| 21225 Brooklyn Park (410/443/667) |
| 21226 Baltimore (410/443/667) |
| 21226 Brooklyn (410/443/667) |
| 21226 Curtis Bay (410/443/667) |
| 21226 Orchard Beach (410/443/667) |
| 21227 Arbutus (410/443/667) |
| 21227 Baltimore (410/443/667) |
| 21227 Halethorpe (410/443/667) |
| 21227 Lansdowne (410/443/667) |
| 21228 Baltimore (410/443/667) |
| 21228 Catonsville (410/443/667) |
| 21229 Baltimore (410/443/667) |
| 21229 Carroll (410/443/667) |
| 21230 Baltimore (410/443/667) |
| 21231 Baltimore (410/443/667) |
| 21231 Patterson (410/443/667) |
| 21233 Baltimore (410/443/667) |
| 21234 Baltimore (410/443/667) |
| 21234 Parkville (410/443/667) |
| 21235 Baltimore (410/443/667) |
| 21235 Social Security Administrat (410/443/667) |
| 21236 Baltimore (410/443/667) |
| 21236 Nottingham (410/443/667) |
| 21237 Baltimore (410/443/667) |
| 21237 Rosedale (410/443/667) |
| 21239 Baltimore (410/443/667) |
| 21239 Northwood (410/443/667) |
| 21240 Baltimore (410/443/667) |
| 21240 Bwi Airport (410/443/667) |
| 21241 Baltimore (410/443/667) |
| 21241 Social Security Admin (410/443/667) |
| 21244 Baltimore (410/443/667) |
| 21244 Windsor Mill (410/443/667) |
| 21250 Baltimore (410/443/667) |
| 21250 Catonsville (410/443/667) |
| 21250 University of Md Baltimore County (410/443/667) |
| 21251 Baltimore (410/443/667) |
| 21251 Morgan State University (410/443/667) |
| 21252 Baltimore (410/443/667) |
| 21252 Towson (410/443/667) |
| 21252 Towson State University (410/443/667) |
| 21260 Baltimore (410/443/667) |
| 21260 Census Bureau (410/443/667) |
| 21263 Baltimore (410/443/667) |
| 21263 Bank of America (410/443/667) |
| 21264 Baltimore (410/443/667) |
| 21264 M T Bank (410/443/667) |
| 21265 Baltimore (410/443/667) |
| 21265 Verizon (410/443/667) |
| 21270 Baltimore (410/443/667) |
| 21270 Reisterstown Rd Plaza (410/443/667) |
| 21273 Baltimore (410/443/667) |
| 21273 Bank of America (410/443/667) |
| 21274 Baltimore (410/443/667) |
| 21274 Bank of America (410/443/667) |
| 21275 Baltimore (410/443/667) |
| 21275 Wachovia Bank (410/443/667) |
| 21278 Baltimore (410/443/667) |
| 21278 Baltimore Sunpapers (410/443/667) |
| 21279 Baltimore (410/443/667) |
| 21279 Crestar Bank (410/443/667) |
| 21279 Sun Trust Bank (410/443/667) |
| 21280 Baltimore (410/443/667) |
| 21280 Bank of America (410/443/667) |
| 21281 Baltimore (410/443/667) |
| 21282 Baltimore (410/443/667) |
| 21282 Pikesville (410/443/667) |
| 21282 Pikesville Finance (410/443/667) |
| 21283 Baltimore (410/443/667) |
| 21283 Bank One (410/443/667) |
| 21284 Baltimore (410/443/667) |
| 21284 Loch Raven (410/443/667) |
| 21284 Towson (410/443/667) |
| 21285 Baltimore (410/443/667) |
| 21285 Towson (410/443/667) |
| 21285 Towson Finance (410/443/667) |
| 21286 Baltimore (410/443/667) |
| 21286 Loch Raven (410/443/667) |
| 21286 Towson (410/443/667) |
| 21287 Baltimore (410/443/667) |
| 21287 Johns Hopkins (410/443/667) |
| 21287 Johns Hopkins Hospital (410/443/667) |
| 21288 Baltimore (410/443/667) |
| 21288 Household Bank (410/443/667) |
| 21289 Baltimore (410/443/667) |
| 21289 T Rowe Price Associates Inc (410/443/667) |
| 21290 Baltimore (410/443/667) |
| 21290 Social Security Admin (410/443/667) |
| 21297 Baltimore (410/443/667) |
| 21297 Firms-Courtesy Reply (410/443/667) |
| 21298 Baltimore (410/443/667) |
| 21298 Firms-Business Reply (410/443/667) |
| 21401 Annapolis (410/443/667) |
| 21401 Cape Saint Claire (410/443/667) |
| 21401 Cpe St Claire (410/443/667) |
| 21402 Annapolis (410/443/667) |
| 21402 Naval Academy (410/443/667) |
| 21403 Annapolis (410/443/667) |
| 21403 Eastport (410/443/667) |
| 21403 Highland Bch (410/443/667) |
| 21404 Annapolis (410/443/667) |
| 21405 Annapolis (410/443/667) |
| 21405 Sherwood Forest (410/443/667) |
| 21405 Sherwood Frst (410/443/667) |
| 21409 Annapolis (410/443/667) |
| 21411 Annapolis (410/443/667) |
| 21411 Comptroller of the Treasury (410/443/667) |
| 21412 Annapolis (410/443/667) |
| 21412 Bancroft Hall (410/443/667) |