Find out information about who called you including the Caller's Name, Caller's Address, Household Members, Phone Carrier, and more!

What is a Reverse Phone Lookup?

Reverse telephone directory (also known as a reverse phone lookup) is a collection of phone numbers and associated caller information. However, unlike a regular telephone directory, where the person uses customer's details (such as their name and address) in order to find the telephone number of that person or business, a reverse phone lookup lets users to search with a telephone number in order to locate the customer information.

Reverse telephone lookups are used by law enforcement and other emergency services to determine the location of a request for help.

240 Area Code Info

The area code 240 is located in the state of Maryland and has exchanges located in Allegany, Charles, District Of Columbia, Frederick, Montgomery, Prince George'S, Prince Georges and Washington counties. There are 444 prefixes within the 240 area code.

You can find more data about each of the prefixes based in the 240 area code using the links below.

Prefix Directory

201 - Ridge
205 - Rockville
206 - Glenn Dale
207 - Damascus
208 - La Plata
209 - Indian Head
210 - Waldorf
212 - Oakland
213 - Waldorf
214 - Mechanicsville
215 - Frederick
216 - Waldorf
217 - Hagerstown
218 - Nanjemoy
219 - Newburg
220 - Poolesville
221 - Rockville
222 - Waldorf
223 - Mount Rainier
224 - Oxon Hill
225 - Frederick
228 - Laurel
229 - Waldorf
230 - Hughesville
231 - Hagerstown
232 - Mount Rainier
233 - Newburg
234 - Damascus
235 - Bethesda
236 - Frederick
237 - Tall Timbers
238 - Rockville
239 - Leonardtown
241 - College Park
242 - Kensington
243 - Gaithersburg
244 - Clinton
245 - Glenn Dale
246 - Gaithersburg
247 - Mount Rainier
248 - Ridge
249 - Mechanicsville
250 - Brandywine
251 - Cascade
252 - Gaithersburg
253 - Oxon Hill
254 - Hughesville
255 - Poolesville
256 - Leonardtown
257 - Nanjemoy
258 - Ridge
260 - Hyattsville
261 - Rockville
262 - Damascus
263 - Damascus
264 - Beltsville
265 - Upper Marlboro
266 - Glenn Dale
267 - Upper Marlboro
268 - Mount Rainier
269 - Clinton
270 - Glenn Dale
271 - Bethesda
272 - Glenn Dale
273 - Mount Rainier
274 - Bethesda
275 - Grantsville
276 - Rockville
277 - Bethesda
279 - Waldorf
280 - Baltimore
281 - Bethesda
282 - Mechanicsville
283 - Kensington
284 - Frostburg
285 - Frederick
286 - Bethesda
287 - Hancock
288 - Thurmont
289 - Oxon Hill
290 - Mount Rainier
291 - Hagerstown
292 - Kensington
293 - Silver Spring
294 - Laurel
295 - Laurel
296 - Hyattsville
297 - College Park
298 - Leonardtown
299 - Waldorf
303 - Clinton
304 - Capitol Heights
305 - Beltsville
306 - Gaithersburg
307 - Emmitsburg
308 - Damascus
309 - Laurel
310 - Hagerstown
312 - Capitol Heights
313 - Hagerstown
314 - Rockville
315 - Frederick
317 - Tall Timbers
318 - Clinton
320 - Waldorf
321 - Oakland
322 - Westernport
323 - Emmitsburg
325 - Damascus
326 - Upper Marlboro
327 - Gaithersburg
328 - Rockville
329 - Hagerstown
331 - Silver Spring
332 - Newburg
333 - Bethesda
334 - Glenn Dale
335 - Glenn Dale
336 - Bethesda
337 - Capitol Heights
338 - Silver Spring
339 - Upper Marlboro
342 - Ashton
344 - Frederick
345 - Baltimore
346 - Waldorf
348 - Clinton
349 - La Plata
350 - Beltsville
351 - Beltsville
352 - La Plata
353 - Beltsville
354 - Beltsville
355 - Beltsville
356 - Frederick
357 - Frederick
358 - Damascus
359 - Indian Head
361 - Gaithersburg
362 - Cumberland
363 - Kensington
364 - Gaithersburg
365 - Damascus
366 - Williamsport
367 - Frederick
368 - Waldorf
369 - Mount Airy
371 - Silver Spring
372 - Gaithersburg
373 - Odenton
374 - Laurel
375 - Capitol Heights
376 - Hughesville
377 - Indian Head
378 - Cumberland
379 - Frederick
381 - Silver Spring
382 - Ijamsville
383 - Bethesda
384 - Tall Timbers
385 - Myersville
386 - Gaithersburg
387 - College Park
388 - Gaithersburg
389 - Ashton
390 - Ashton
391 - College Park
392 - Capitol Heights
393 - Silver Spring
394 - Mount Airy
395 - Bethesda
396 - Bethesda
398 - Silver Spring
399 - Rockville
401 - Rockville
403 - Rockville
404 - Gaithersburg
405 - Frederick
407 - Clinton
409 - Frederick
412 - Waldorf
413 - Hyattsville
414 - Oxon Hill
416 - Waldorf
417 - Capitol Heights
418 - Beltsville
420 - Hagerstown
421 - Rockville
422 - Frederick
423 - Silver Spring
425 - Bethesda
426 - Bethesda
427 - Waldorf
429 - Silver Spring
430 - Kensington
431 - Tall Timbers
432 - Beltsville
433 - Silver Spring
434 - Leonardtown
436 - Ijamsville
437 - Ashton
439 - Washington
441 - Oxon Hill
442 - Oakland
446 - Frederick
447 - Rockville
449 - Gaithersburg
450 - Silver Spring
453 - Rockville
454 - Gaithersburg
455 - Capitol Heights
456 - Laurel
460 - Silver Spring
461 - Silver Spring
462 - Beltsville
463 - Silver Spring
464 - Chevy Chase
465 - Bethesda
466 - Mechanicsville
469 - Baltimore
471 - Silver Spring
472 - Silver Spring
473 - College Park
475 - Silver Spring
476 - Silver Spring
477 - Gaithersburg
478 - Silver Spring
481 - Silver Spring
482 - Bethesda
483 - Bethesda
485 - Silver Spring
486 - Glenn Dale
487 - Hyattsville
489 - Poolesville
490 - Middletown
491 - Silver Spring
492 - Capitol Heights
493 - Oxon Hill
494 - Silver Spring
497 - Chevy Chase
498 - Beltsville
499 - Rockville
501 - Silver Spring
505 - Silver Spring
506 - Rockville
508 - Capitol Heights
510 - Upper Marlboro
512 - Pikesville
514 - Kensington
515 - Bethesda
516 - Silver Spring
520 - Hagerstown
522 - Cumberland
523 - La Plata
524 - Laurel
525 - Upper Marlboro
526 - Leonardtown
527 - Hagerstown
528 - Hughesville
529 - Frederick
533 - Mount Rainier
535 - Silver Spring
536 - Ashton
538 - Leonardtown
539 - Hyattsville
542 - College Park
543 - Beltsville
544 - Glenn Dale
545 - Upper Marlboro
546 - Clinton
547 - Laurel
548 - Glenn Dale
553 - College Park
554 - Laurel
555 - Baltimore
556 - Glenn Dale
558 - Rockville
559 - Ashton
560 - Silver Spring
565 - Laurel
566 - Frederick
567 - Rockville
568 - Laurel
573 - Upper Marlboro
575 - Frederick
577 - Washington
580 - Cumberland
581 - Laurel
582 - Hyattsville
586 - Frederick
593 - Laurel
595 - Wshngtnzn3
597 - Gaithersburg
599 - Mount Rainier
600 - Frederick
601 - Beltsville
602 - Beltsville
603 - Beltsville
604 - Beltsville
605 - Beltsville
606 - Beltsville
607 - Waldorf
616 - Laurel
619 - Temple Hills
620 - Rockville
621 - Rockville
624 - Greenbelt
625 - Hagerstown
626 - Frederick
627 - Kensington
629 - Frederick
631 - Gaithersburg
632 - Gaithersburg
638 - Mount Rainier
641 - Rockville
642 - Rockville
643 - Silver Spring
644 - Bethesda
645 - Silver Spring
646 - Laurel
652 - Mechanicsville
654 - Beltsville
662 - Silver Spring
667 - Hyattsville
668 - Damascus
669 - Kensington
671 - Bethesda
672 - Rockville
674 - Frederick
675 - Myersville
676 - Silver Spring
678 - Silver Spring
681 - Brandywine
682 - Waldorf
683 - Gaithersburg
684 - Greenbelt
685 - Brandywine
686 - Gaithersburg
687 - Silver Spring
688 - Beltsville
691 - Capitol Heights
694 - Rockville
695 - Temple Hills
696 - Hyattsville
699 - Adamstown
715 - Rockville
718 - Tall Timbers
720 - Gaithersburg
722 - Ashton
723 - Silver Spring
724 - Oxon Hill
725 - Lexington Park
727 - Cumberland
731 - Rockville
737 - Hyattsville
743 - Beltsville
744 - Mount Rainier
745 - Damascus
747 - Kensington
750 - Gaithersburg
751 - Gaithersburg
752 - Chevy Chase
753 - Rockville
755 - Laurel
757 - College Park
764 - Hyattsville
765 - Capitol Heights
766 - Oxon Hill
767 - Capitol Heights
770 - Hyattsville
773 - Rockville
776 - La Plata
777 - Rockville
778 - Rockville
779 - Ashton
780 - Gaithersburg
782 - Damascus
783 - Bethesda
784 - Myersville
786 - Laurel
787 - Brandywine
788 - Mount Rainier
790 - Mount Rainier
793 - Gaithersburg
794 - Tall Timbers
804 - Newburg
812 - Poolesville
813 - Gaithersburg
818 - Smithsburg
821 - Silver Spring
823 - Brandywine
825 - Rockville
826 - Rockville
832 - Bethesda
833 - Kensington
835 - Rockville
837 - Hughesville
838 - Capitol Heights
839 - Silver Spring
841 - Laurel
842 - Glenn Dale
843 - College Park
844 - Ridge
845 - College Park
846 - Clinton
848 - Gaithersburg
855 - Beltsville
857 - Temple Hills
860 - Laurel
861 - Laurel
863 - Laurel
864 - Rockville
865 - Baltimore
866 - Laurel
868 - Silver Spring
869 - Cumberland
876 - Bethesda
880 - Mount Rainier
882 - Capitol Heights
883 - Ashton
888 - Rockville
892 - Upper Marlboro
893 - Silver Spring
895 - Lexington Park
897 - Mount Rainier
898 - Mount Rainier
899 - Bethesda
906 - Laurel
912 - Gaithersburg
920 - Cumberland
925 - Leonardtown
929 - Glenn Dale
936 - Washington
938 - Ashton
949 - Clinton
965 - College Park
976 - Halethorpe
979 - Cumberland
986 - Nanjemoy
988 - Beltsville
993 - Indian Head
994 - Rockville
997 - Silver Spring
999 - Washington