Interchange Listings for Area Code 240
| AreaCode/Prefix |
City |
| 240-201 | Ridge, MD |
| 240-203 | Hagerstown, MD |
| 240-207 | Damascus, MD |
| 240-208 | La Plata, MD |
| 240-209 | Indian Head, MD |
| 240-210 | Waldorf, MD |
| 240-212 | Oakland, MD |
| 240-213 | Waldorf, MD |
| 240-214 | Mechanicsville, MD |
| 240-215 | Frederick, MD |
| 240-216 | Waldorf, MD |
| 240-217 | Hagerstown, MD |
| 240-218 | Nanjemoy, MD |
| 240-219 | Ridge, MD |
| 240-220 | Poolesville, MD |
| 240-222 | Waldorf, MD |
| 240-224 | Gaithersburg, MD |
| 240-225 | Frederick, MD |
| 240-229 | Waldorf, MD |
| 240-230 | Hughesville, MD |
| 240-231 | Hagerstown, MD |
| 240-236 | Frederick, MD |
| 240-239 | Leonardtown, MD |
| 240-243 | Gaithersburg, MD |
| 240-246 | Gaithersburg, MD |
| 240-248 | Ridge, MD |
| 240-249 | Mechanicsville, MD |
| 240-250 | Brandywine, MD |
| 240-252 | Gaithersburg, MD |
| 240-254 | Hughesville, MD |
| 240-255 | Poolesville, MD |
| 240-256 | Leonardtown, MD |
| 240-257 | Nanjemoy, MD |
| 240-258 | Ridge, MD |
| 240-261 | Gaithersburg, MD |
| 240-264 | Laurel, MD |
| 240-267 | Hagerstown, MD |
| 240-270 | Waldorf, MD |
| 240-275 | Grantsville, MD |
| 240-278 | Laurel, MD |
| 240-279 | Waldorf, MD |
| 240-280 | Laurel, MD |
| 240-282 | Mechanicsville, MD |
| 240-284 | Frostburg, MD |
| 240-285 | Frederick, MD |
| 240-287 | Hancock, MD |
| 240-288 | Thurmont, MD |
| 240-291 | Hagerstown, MD |
| 240-294 | Laurel, MD |
| 240-295 | Laurel, MD |
| 240-298 | Leonardtown, MD |
| 240-299 | Waldorf, MD |
| 240-300 | Waldorf, MD |
| 240-302 | Laurel, MD |
| 240-306 | Gaithersburg, MD |
| 240-307 | Emmitsburg, MD |
| 240-308 | Damascus, MD |
| 240-309 | Leonardtown, MD |
| 240-310 | Hagerstown, MD |
| 240-313 | Hagerstown, MD |
| 240-315 | Frederick, MD |
| 240-319 | Laurel, MD |
| 240-320 | Waldorf, MD |
| 240-321 | Oakland, MD |
| 240-323 | Emmitsburg, MD |
| 240-324 | Ashton, MD |
| 240-325 | Damascus, MD |
| 240-327 | Gaithersburg, MD |
| 240-329 | Hagerstown, MD |
| 240-341 | Buckeystown, MD |
| 240-342 | Ashton, MD |
| 240-343 | Hancock, MD |
| 240-344 | Frederick, MD |
| 240-345 | Ashton, MD |
| 240-346 | Waldorf, MD |
| 240-347 | Hagerstown, MD |
| 240-349 | La Plata, MD |
| 240-352 | La Plata, MD |
| 240-356 | Myersville, MD |
| 240-357 | Frederick, MD |
| 240-358 | Damascus, MD |
| 240-359 | Indian Head, MD |
| 240-360 | Laurel, MD |
| 240-361 | Gaithersburg, MD |
| 240-362 | Cumberland, MD |
| 240-364 | Gaithersburg, MD |
| 240-365 | Damascus, MD |
| 240-366 | Williamsport, MD |
| 240-367 | Frederick, MD |
| 240-368 | Waldorf, MD |
| 240-369 | Mount Airy, MD |
| 240-372 | Gaithersburg, MD |
| 240-374 | Laurel, MD |
| 240-376 | Hughesville, MD |
| 240-377 | Indian Head, MD |
| 240-378 | Cumberland, MD |
| 240-379 | Frederick, MD |
| 240-382 | Hagerstown, MD |
| 240-385 | Myersville, MD |
| 240-388 | Gaithersburg, MD |
| 240-389 | Ashton, MD |
| 240-390 | Ashton, MD |
| 240-394 | Mount Airy, MD |
| 240-397 | Frederick, MD |
| 240-404 | Gaithersburg, MD |
| 240-405 | Frederick, MD |
| 240-409 | Frederick, MD |
| 240-412 | Waldorf, MD |
| 240-415 | Frederick, MD |
| 240-416 | Waldorf, MD |
| 240-419 | Waldorf, MD |
| 240-420 | Hagerstown, MD |
| 240-422 | Frederick, MD |
| 240-427 | Waldorf, MD |
| 240-434 | Leonardtown, MD |
| 240-435 | Waldorf, MD |
| 240-436 | Buckeystown, MD |
| 240-437 | Ashton, MD |
| 240-439 | Frederick, MD |
| 240-440 | Frederick, MD |
| 240-442 | Oakland, MD |
| 240-444 | Laurel, MD |
| 240-446 | Frederick, MD |
| 240-448 | Waldorf, MD |
| 240-449 | Gaithersburg, MD |
| 240-451 | Thurmont, MD |
| 240-452 | Hagerstown, MD |
| 240-454 | Gaithersburg, MD |
| 240-456 | Laurel, MD |
| 240-457 | Frederick, MD |
| 240-458 | Waldorf, MD |
| 240-459 | Laurel, MD |
| 240-466 | Mechanicsville, MD |
| 240-469 | Hagerstown, MD |
| 240-470 | Laurel, MD |
| 240-474 | Gaithersburg, MD |
| 240-477 | Gaithersburg, MD |
| 240-484 | Laurel, MD |
| 240-488 | Oakland, MD |
| 240-489 | Poolesville, MD |
| 240-490 | Middletown, MD |
| 240-496 | Leonardtown, MD |
| 240-500 | Hagerstown, MD |
| 240-513 | Hagerstown, MD |
| 240-517 | Laurel, MD |
| 240-518 | Waldorf, MD |
| 240-520 | Hagerstown, MD |
| 240-522 | Cumberland, MD |
| 240-523 | La Plata, MD |
| 240-524 | Laurel, MD |
| 240-526 | Leonardtown, MD |
| 240-527 | Hagerstown, MD |
| 240-528 | Hughesville, MD |
| 240-529 | Frederick, MD |
| 240-530 | Waldorf, MD |
| 240-536 | Ashton, MD |
| 240-538 | Leonardtown, MD |
| 240-547 | Laurel, MD |
| 240-549 | Frederick, MD |
| 240-554 | Laurel, MD |
| 240-559 | Ashton, MD |
| 240-561 | Leonardtown, MD |
| 240-562 | Gaithersburg, MD |
| 240-565 | Laurel, MD |
| 240-566 | Frederick, MD |
| 240-568 | Laurel, MD |
| 240-570 | Ashton, MD |
| 240-575 | Frederick, MD |
| 240-577 | Leonardtown, MD |
| 240-578 | Frederick, MD |
| 240-580 | Cumberland, MD |
| 240-581 | Laurel, MD |
| 240-583 | Laurel, MD |
| 240-585 | Waldorf, MD |
| 240-586 | Frederick, MD |
| 240-587 | Leonardtown, MD |
| 240-593 | Laurel, MD |
| 240-597 | Gaithersburg, MD |
| 240-607 | Waldorf, MD |
| 240-608 | Frederick, MD |
| 240-609 | Cumberland, MD |
| 240-625 | Hagerstown, MD |
| 240-626 | Frederick, MD |
| 240-629 | Frederick, MD |
| 240-631 | Gaithersburg, MD |
| 240-632 | Gaithersburg, MD |
| 240-633 | Hughesville, MD |
| 240-636 | Laurel, MD |
| 240-640 | Waldorf, MD |
| 240-646 | Laurel, MD |
| 240-651 | Frederick, MD |
| 240-652 | Mechanicsville, MD |
| 240-654 | Gaithersburg, MD |
| 240-657 | Frostburg, MD |
| 240-666 | Nanjemoy, MD |
| 240-668 | Damascus, MD |
| 240-674 | Frederick, MD |
| 240-675 | Myersville, MD |
| 240-681 | Brandywine, MD |
| 240-682 | Waldorf, MD |
| 240-683 | Gaithersburg, MD |
| 240-685 | Brandywine, MD |
| 240-686 | Gaithersburg, MD |
| 240-690 | Gaithersburg, MD |
| 240-699 | Buckeystown, MD |
| 240-702 | Gaithersburg, MD |
| 240-707 | Hagerstown, MD |
| 240-708 | Laurel, MD |
| 240-712 | Laurel, MD |
| 240-713 | Laurel, MD |
| 240-720 | Gaithersburg, MD |
| 240-722 | Ashton, MD |
| 240-727 | Cumberland, MD |
| 240-732 | Mount Airy, MD |
| 240-734 | Smithsburg, MD |
| 240-745 | Damascus, MD |
| 240-750 | Gaithersburg, MD |
| 240-751 | Gaithersburg, MD |
| 240-754 | Waldorf, MD |
| 240-755 | Laurel, MD |
| 240-758 | Laurel, MD |
| 240-771 | Poolesville, MD |
| 240-772 | Frederick, MD |
| 240-774 | Lonaconing, MD |
| 240-775 | Westernport, MD |
| 240-776 | La Plata, MD |
| 240-779 | Ashton, MD |
| 240-780 | Gaithersburg, MD |
| 240-782 | Damascus, MD |
| 240-784 | Myersville, MD |
| 240-786 | Laurel, MD |
| 240-787 | Brandywine, MD |
| 240-793 | Gaithersburg, MD |
| 240-801 | Gaithersburg, MD |
| 240-803 | Cumberland, MD |
| 240-805 | Gaithersburg, MD |
| 240-806 | Indian Head, MD |
| 240-808 | Leonardtown, MD |
| 240-812 | Poolesville, MD |
| 240-813 | Gaithersburg, MD |
| 240-815 | Frederick, MD |
| 240-816 | Keedysville, MD |
| 240-817 | Ashton, MD |
| 240-818 | Myersville, MD |
| 240-823 | Brandywine, MD |
| 240-831 | Frederick, MD |
| 240-837 | Hughesville, MD |
| 240-841 | Laurel, MD |
| 240-844 | Ridge, MD |
| 240-848 | Gaithersburg, MD |
| 240-850 | Hagerstown, MD |
| 240-856 | Laurel, MD |
| 240-859 | Ashton, MD |
| 240-860 | Cumberland, MD |
| 240-862 | Mount Savage, MD |
| 240-870 | Middletown, MD |
| 240-877 | Frederick, MD |
| 240-883 | Ashton, MD |
| 240-901 | La Plata, MD |
| 240-903 | Indian Head, MD |
| 240-904 | Laurel, MD |
| 240-908 | Walkersville, MD |
| 240-912 | Gaithersburg, MD |
| 240-913 | Damascus, MD |
| 240-915 | New Market, MD |
| 240-917 | Laurel, MD |
| 240-918 | Ashton, MD |
| 240-920 | Cumberland, MD |
| 240-925 | Leonardtown, MD |
| 240-938 | Ashton, MD |
| 240-964 | Cumberland, MD |
| 240-971 | Frederick, MD |
| 240-972 | Laurel, MD |
| 240-976 | Damascus, MD |
| 240-979 | Cumberland, MD |
| 240-985 | Williamsport, MD |
| 240-986 | Nanjemoy, MD |
| 240-993 | Indian Head, MD |
| 240-996 | Brunswick, MD |
| 240-998 | Hancock, MD |