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Area Code 240

Prefix City State
124 Alvin TX
201 Ridge MD
205 Bethesda MD
206 Bowie MD
207 Damascus MD
208 La Plata MD
209 Indian Head MD
210 Waldorf MD
212 Oakland MD
213 Waldorf MD
214 Mechanicsville MD
215 Frederick MD
216 Waldorf MD
217 Hagerstown MD
218 Nanjemoy MD
220 Poolesville MD
221 Rockville MD
222 Waldorf MD
223 Bethesda MD
227 Baltimore MD
228 Laurel MD
229 Waldorf MD
230 Hughesville MD
232 Bowie MD
233 Tompkinsville MD
235 Bethesda MD
236 Frederick MD
237 Lexington Park MD
238 Bethesda MD
241 Beltsville MD
242 Silver Spring MD
243 Germantown MD
244 Allentown MD
245 Bowie MD
246 Germantown MD
247 Beltsville MD
248 Ridge MD
249 Mechanicsville MD
250 Baden MD
251 Cascade MD
252 Germantown MD
253 Waldorf MD
254 Hughesville MD
255 Poolesville MD
256 Leonardtown MD
257 Nanjemoy MD
258 Ridge MD
260 Bowie MD
261 Bethesda MD
264 Beltsville MD
265 Allentown MD
266 Bowie MD
268 Bethesda MD
269 Allentown MD
271 Bethesda MD
273 Waldorf MD
274 Bethesda MD
276 Rockville MD
277 Bethesda MD
280 Laurel MD
281 Bethesda MD
282 Mechanicsville MD
283 Silver Spring MD
284 Frostburg MD
285 Frederick MD
286 Bethesda MD
288 Thurmont MD
289 Waldorf MD
290 Silver Spring MD
291 Hagerstown MD
292 Silver Spring MD
293 Beltsville MD
294 Laurel MD
295 Laurel MD
296 Washington MD
297 Beltsville MD
298 Leonardtown MD
299 Waldorf MD
303 Allentown MD
304 Allentown MD
305 Beltsville MD
306 Germantown MD
308 Damascus MD
310 Hagerstown MD
312 Allentown MD
313 Hagerstown MD
314 Rockville MD
315 Frederick MD
316 Bethesda MD
317 Lexington Park MD
318 Clinton MD
319 Columbia MD
320 Waldorf MD
321 Oakland MD
326 Upper Marlboro MD
328 Rockville MD
329 Hagerstown MD
330 Bethesda MD
331 Beltsville MD
332 Tompkinsville MD
333 Bethesda MD
334 Bowie MD
335 Bowie MD
337 Allentown MD
338 Beltsville MD
339 Upper Marlboro MD
342 Laurel MD
344 Frederick MD
345 Clarksville MD
346 Waldorf MD
347 Hagerstown MD
348 Allentown MD
349 La Plata MD
350 Beltsville MD
351 Beltsville MD
352 La Plata MD
353 Beltsville MD
354 Beltsville MD
355 Beltsville MD
357 Frederick MD
358 Damascus MD
359 Indian Head MD
361 Germantown MD
362 Cresaptown MD
363 Silver Spring MD
364 Germantown MD
366 Williamsport MD
367 Frederick MD
368 Waldorf MD
370 Bethesda MD
371 Beltsville MD
372 Germantown MD
374 Laurel MD
375 Allentown MD
376 Hughesville MD
377 Indian Head MD
379 Frederick MD
380 Bethesda MD
381 Beltsville MD
383 Bethesda MD
384 Lexington Park MD
385 Myersville MD
386 Gaithersburg MD
387 Beltsville MD
388 Germantown MD
389 Laurel MD
390 Laurel MD
391 Beltsville MD
392 Allentown MD
393 Beltsville MD
394 Mount Airy MD
395 Bethesda MD
396 Bethesda MD
397 Frederick MD
398 Beltsville MD
399 Bethesda MD
400
401 Bethesda MD
403 Bethesda MD
404 Germantown MD
405 Frederick MD
407 Allentown MD
409 Frederick MD
412 Waldorf MD
413 Washington MD
414 Waldorf MD
416 Waldorf MD
417 Allentown MD
418 Bethesda MD
419 Waldorf MD
420 Hagerstown MD
421 Bethesda MD
422 Frederick MD
423 Beltsville MD
424 Beltsville MD
425 Bethesda MD
426 Bethesda MD
427 Waldorf MD
429 Beltsville MD
430 Silver Spring MD
431 Lexington Park MD
432 Beltsville MD
433 Beltsville MD
434 Leonardtown MD
435 Waldorf MD
436 Buckeystown MD
437 Laurel MD
439 Frederick MD
440 Frederick MD
441 Waldorf MD
442 Thayerville MD
446 Frederick MD
447 Bethesda MD
449 Germantown MD
450 Beltsville MD
453 Rockville MD
454 Germantown MD
455 Allentown MD
456 Laurel MD
460 Beltsville MD
461 Beltsville MD
462 Beltsville MD
463 Beltsville MD
464 Bethesda MD
465 Bethesda MD
466 Mechanicsville MD
468 Beltsville MD
469 Hagerstown MD
471 Beltsville MD
472 Beltsville MD
473 Beltsville MD
475 Beltsville MD
476 Beltsville MD
477 Germantown MD
478 Beltsville MD
479 Bethesda MD
481 Beltsville MD
482 Bethesda MD
483 Bethesda MD
485 Beltsville MD
486 Bowie MD
487 Washington MD
489 Poolesville MD
490 Braddock Heights MD
491 Beltsville MD
492 Allentown MD
493 Waldorf MD
494 Beltsville MD
497 Chevy Chase MD
498 Bethesda MD
499 Bethesda MD
501 Beltsville MD
505 Beltsville MD
506 Bethesda MD
507 Bethesda MD
508 Allentown MD
510 Upper Marlboro MD
514 Silver Spring MD
515 Bethesda MD
516 Beltsville MD
520 Hagerstown MD
522 Cumberland MD
523 La Plata MD
524 Laurel MD
525 Upper Marlboro MD
526 Leonardtown MD
527 Hagerstown MD
528 Hughesville MD
529 Frederick MD
533 Beltsville MD
535 Beltsville MD
536 Laurel MD
538 Leonardtown MD
539 Washington MD
542 Beltsville MD
543 Bethesda MD
544 Bowie MD
545 Upper Marlboro MD
547 Laurel MD
550 Bethesda MD
551 Bethesda MD
552 Bethesda MD
553 Beltsville MD
554 Laurel MD
555 Hyattsville MD
556 Bowie MD
558 Silver Spring MD
559 Laurel MD
560 Beltsville MD
565 Columbia MD
566 Frederick MD
567 Rockville MD
568 Laurel MD
573 Upper Marlboro MD
575 Frederick MD
577 Leonardtown MD
580 Cumberland MD
581 Laurel MD
582 Hyattsville MD
586 Frederick MD
590 Gaithersburg MD
593 Columbia MD
595 Beltsville MD
597 Germantown MD
599 Bethesda MD
601 Beltsville MD
602 Beltsville MD
603 Beltsville MD
604 Beltsville MD
605 Beltsville MD
606 Beltsville MD
607 Waldorf MD
612 Allentown MD
616 Beltsville MD
619 Allentown MD
620 Bethesda MD
624 College Park MD
625 Hagerstown MD
626 Frederick MD
627 Silver Spring MD
628 Frederick MD
629 Frederick MD
631 Gaithersburg MD
632 Gaithersburg MD
638 Beltsville MD
640 Waldorf MD
642 Bethesda MD
643 Beltsville MD
644 Bethesda MD
645 Beltsville MD
646 Laurel MD
647 Chestertown MD
652 Mechanicsville MD
654 Germantown MD
662 Silver Spring MD
667 Washington MD
668 Damascus MD
669 Silver Spring MD
671 Bethesda MD
672 Bethesda MD
674 Frederick MD
675 Myersville MD
676 Beltsville MD
678 Beltsville MD
681 Baden MD
682 Waldorf MD
683 Gaithersburg MD
684 College Park MD
685 Baden MD
686 Germantown MD
687 Beltsville MD
688 Beltsville MD
691 Allentown MD
694 Bethesda MD
695 Temple Hills MD
696 Washington MD
699 Buckeystown MD
701 Beltsville MD
704 Beltsville MD
705 Beltsville MD
706 Beltsville MD
715 Bethesda MD
718 Lexington Park MD
720 Germantown MD
722 Laurel MD
723 Beltsville MD
724 Waldorf MD
725 Lexington Park MD
727 Cumberland MD
731 Bethesda MD
737 Washington MD
743 Bethesda MD
744 Bethesda MD
747 Silver Spring MD
750 Germantown MD
751 Germantown MD
752 Bethesda MD
753 Bethesda MD
755 Columbia MD
757 Beltsville MD
764 Washington MD
765 Allentown MD
766 Waldorf MD
767 Allentown MD
770 Washington MD
773 Rockville MD
776 La Plata MD
777 Rockville MD
778 Bethesda MD
779 Laurel MD
780 Germantown MD
782 Damascus MD
784 Myersville MD
786 Laurel MD
787 Baden MD
788 Allentown MD
790 Beltsville MD
793 Germantown MD
794 Lexington Park MD
812 Poolesville MD
813 Germantown MD
818 Smithsburg MD
821 Beltsville MD
823 Baden MD
826 Rockville MD
832 Bethesda MD
833 Silver Spring MD
838 Allentown MD
839 Beltsville MD
842 Annapolis MD
843 Columbia MD
845 Beltsville MD
846 Allentown MD
848 Germantown MD
855 Bethesda MD
857 Allentown MD
863 Beltsville MD
864 Bethesda MD
865 Annapolis MD
868 Beltsville MD
876 Bethesda MD
880 Silver Spring MD
882 Allentown MD
883 Laurel MD
888 Bethesda MD
892 Upper Marlboro MD
893 Beltsville MD
895 Lexington Park MD
897 Allentown MD
898 Washington MD
899 Bethesda MD
912 Germantown MD
920 Cumberland MD
925 Leonardtown MD
929 Bowie MD
938 Laurel MD
949 Allentown MD
964 Cumberland MD
965 Beltsville MD
979 Cumberland MD
986 Nanjemoy MD
988 Beltsville MD
993 Indian Head MD
994 Bethesda MD
997 Beltsville MD