| Prefix | City |
|---|---|
| 667-200 | Columbia, Maryland |
| 667-201 | Bel Air, Maryland |
| 667-202 | Elkton, Maryland |
| 667-203 | Baltimore, Maryland |
| 667-204 | Annapolis, Maryland |
| 667-205 | Baltimore, Maryland |
| 667-206 | Towson, Maryland |
| 667-207 | Baltimore, Maryland |
| 667-208 | Baltimore, Maryland |
| 667-209 | Baltimore, Maryland |
| 667-210 | Baltimore, Maryland |
| 667-212 | Baltimore, Maryland |
| 667-213 | Baltimore, Maryland |
| 667-214 | Baltimore, Maryland |
| 667-215 | Elkton, Maryland |
| 667-216 | Baltimore, Maryland |
| 667-217 | Baltimore, Maryland |
| 667-218 | Baltimore, Maryland |
| 667-219 | Baltimore, Maryland |
| 667-220 | Greensboro, Maryland |
| 667-221 | Salisbury, Maryland |
| 667-222 | Argrgbsnis, Maryland |
| 667-223 | Baltimore, Maryland |
| 667-224 | Baltimore, Maryland |
| 667-225 | Annapolis, Maryland |
| 667-226 | Stmichaels, Maryland |
| 667-227 | Salisbury, Maryland |
| 667-228 | Aberdeen, Maryland |
| 667-229 | Aberdeen, Maryland |
| 667-230 | Centreville, Maryland |
| 667-231 | Aberdeen, Maryland |
| 667-232 | Glen Burnie, Maryland |
| 667-233 | Baltimore, Maryland |
| 667-234 | Baltimore, Maryland |
| 667-235 | Salisbury, Maryland |
| 667-236 | Perryville, Maryland |
| 667-237 | West River, Maryland |
| 667-238 | Preston, Maryland |
| 667-239 | Baltimore, Maryland |
| 667-240 | Columbia, Maryland |
| 667-241 | Ridgely, Maryland |
| 667-242 | Rock Hall, Maryland |
| 667-243 | Oxford, Maryland |
| 667-244 | Still Pond, Maryland |
| 667-245 | Cecilton, Maryland |
| 667-246 | Centreville, Maryland |
| 667-247 | Chesapeake City, Maryland |
| 667-248 | Denton, Maryland |
| 667-249 | Galena, Maryland |
| 667-250 | Baltimore, Maryland |
| 667-251 | Towson, Maryland |
| 667-252 | Salisbury, Maryland |
| 667-253 | Salisbury, Maryland |
| 667-254 | Chestertown, Maryland |
| 667-255 | Hillsboro, Maryland |
| 667-256 | Aberdeen, Maryland |
| 667-257 | Columbia, Maryland |
| 667-258 | Baltimore, Maryland |
| 667-259 | Reisterstown, Maryland |
| 667-260 | Baltimore, Maryland |
| 667-261 | Towson, Maryland |
| 667-262 | Baltimore, Maryland |
| 667-263 | Towson, Maryland |
| 667-264 | Delmar, Maryland |
| 667-265 | Vienna, Maryland |
| 667-266 | Salisbury, Maryland |
| 667-267 | Annapolis, Maryland |
| 667-268 | Darlington, Maryland |
| 667-269 | Elkton, Maryland |
| 667-270 | Annapolis, Maryland |
| 667-277 | Sherwd For, Maryland |
| 667-281 | Salisbury, Maryland |
| 667-285 | Hurlock, Maryland |
| 667-291 | Millington, Maryland |
| 667-295 | Crofton, Maryland |
| 667-300 | Columbia, Maryland |
| 667-303 | Baltimore, Maryland |
| 667-305 | Pikesville, Maryland |
| 667-307 | Crofton, Maryland |
| 667-308 | Towson, Maryland |
| 667-309 | Baltimore, Maryland |
| 667-312 | Baltimore, Maryland |
| 667-313 | Pikesville, Maryland |
| 667-314 | Westminster, Maryland |
| 667-321 | Prince Frederick, Maryland |
| 667-326 | Church Hill, Maryland |
| 667-330 | Salisbury, Maryland |
| 667-332 | New Windsor, Maryland |
| 667-333 | Argrgbsnis, Maryland |
| 667-336 | Bel Air, Maryland |
| 667-344 | Chase, Maryland |
| 667-345 | Catonsville, Maryland |
| 667-352 | Aberdeen, Maryland |
| 667-362 | Annapolis, Maryland |
| 667-364 | Stevensville, Maryland |
| 667-366 | Hampstead, Maryland |
| 667-367 | Westminster, Maryland |
| 667-372 | Cambridge, Maryland |
| 667-373 | North Beach, Maryland |
| 667-382 | Wingate, Maryland |
| 667-400 | Baltimore, Maryland |
| 667-401 | Baltimore, Maryland |
| 667-402 | Baltimore, Maryland |
| 667-444 | Baltimore, Maryland |
| 667-458 | Annapolis, Maryland |
| 667-473 | Solomons, Maryland |
| 667-500 | Annapolis, Maryland |
| 667-545 | Warwick, Maryland |
| 667-600 | Baltimore, Maryland |
| 667-627 | Annapolis, Maryland |
| 667-653 | Brynpklncm, Maryland |
| 667-666 | West River, Maryland |
| 667-677 | Baltimore, Maryland |
| 667-686 | Ellicott City, Maryland |
| 667-701 | Elkridge, Maryland |
| 667-706 | Elkton, Maryland |
| 667-722 | Glenwood, Maryland |
| 667-727 | Sudlersville, Maryland |
| 667-770 | Baltimore, Maryland |
| 667-771 | Baltimore, Maryland |
| 667-777 | Severna Park, Maryland |
| 667-786 | Columbia, Maryland |
| 667-800 | Salisbury, Maryland |
| 667-802 | Catonsville, Maryland |
| 667-803 | Solomons, Maryland |
| 667-808 | Easton, Maryland |
| 667-812 | Waterlo236, Maryland |
| 667-837 | Port Deposit, Maryland |
| 667-843 | Deal Island, Maryland |
| 667-855 | Salisbury, Maryland |
| 667-866 | Darlington, Maryland |
| 667-867 | Baltimore, Maryland |
| 667-868 | Crisfield, Maryland |
| 667-876 | Annapolis, Maryland |
| 667-888 | Baltimore, Maryland |
| 667-900 | Baltimore, Maryland |
| 667-930 | Baltimore, Maryland |
| 667-946 | Churchville, Maryland |
| 667-967 | Glen Burnie, Maryland |
| 667-999 | Elkridge, Maryland |