This step usually takes a few seconds.
| Zip | Ciudad |
| 21013 | BALDWIN, MD |
| 21020 | BORING, MD |
| 21022 | BROOKLANDVILLE, MD |
| 21023 | BUTLER, MD |
| 21027 | CHASE, MD |
| 21030 | COCKEYSVILLE, MD |
| 21031 | HUNT VALLEY, MD |
| 21051 | FORK, MD |
| 21052 | FORT HOWARD, MD |
| 21053 | FREELAND, MD |
| 21057 | GLEN ARM, MD |
| 21065 | HUNT VALLEY, MD |
| 21071 | GLYNDON, MD |
| 21082 | HYDES, MD |
| 21087 | KINGSVILLE, MD |
| 21092 | LONG GREEN, MD |
| 21093 | LUTHERVILLE TIMONIUM, MD |
| 21094 | LUTHERVILLE TIMONIUM, MD |
| 21105 | MARYLAND LINE, MD |
| 21111 | MONKTON, MD |
| 21117 | OWINGS MILLS, MD |
| 21120 | PARKTON, MD |
| 21128 | PERRY HALL, MD |
| 21131 | PHOENIX, MD |
| 21133 | RANDALLSTOWN, MD |
| 21136 | REISTERSTOWN, MD |
| 21139 | RIDERWOOD, MD |
| 21152 | SPARKS GLENCOE, MD |
| 21153 | STEVENSON, MD |
| 21155 | UPPERCO, MD |
| 21156 | UPPER FALLS, MD |
| 21162 | WHITE MARSH, MD |
| 21204 | TOWSON, MD |
| 21207 | GWYNN OAK, MD |
| 21208 | PIKESVILLE, MD |
| 21219 | SPARROWS POINT, MD |
| 21220 | MIDDLE RIVER, MD |
| 21221 | ESSEX, MD |
| 21222 | DUNDALK, MD |
| 21227 | HALETHORPE, MD |
| 21228 | CATONSVILLE, MD |
| 21234 | PARKVILLE, MD |
| 21236 | NOTTINGHAM, MD |
| 21237 | ROSEDALE, MD |
| 21244 | WINDSOR MILL, MD |
| 21250 | BALTIMORE, MD |
| 21252 | TOWSON, MD |
| 21282 | PIKESVILLE, MD |
| 21284 | TOWSON, MD |
| 21285 | TOWSON, MD |
| 21286 | TOWSON, MD |