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Area Code 240
Active Prefixes in Area Code 240
240-649
Smithsburg, Maryland
240-295
Laurel
240-605
Beltsville
240-647
Clear Spg, Maryland
240-895
Patuxent River
240-329
Hagerstown
240-591
Hagerstown, Maryland
240-265
Bethesda
240-801
Gaithersburg
240-580
Cumberland
240-502
Silver Spring
240-510
Upper Marlboro
240-300
Waldorf
240-264
Beltsville
240-351
Beltsville
240-531
Silver Spring
240-543
Bethesda
240-972
Columbia
240-478
Bethesda
240-813
Gaithersburg
240-832
Bethesda
240-782
Clarksburg
240-513
Hagerstown
240-451
Thurmont
240-876
Bethesda
240-247
Hyattsville
240-634
Ridge, Maryland
240-557
Hyattsville
240-843
Riverdale
240-551
Rockville
240-223
Hyattsville
240-447
Rockville
240-745
Clarksburg
240-701
Silver Spring
240-696
Hyattsville
240-444
Laurel
240-753
Rockville
240-512
Riverdale
240-652
Charlotte Hall
240-233
Issue
240-304
Hyattsville
240-314
Rockville
240-882
Capitol Heights
240-812
Poolesville
240-555
Wshngtnzn4, Maryland
240-229
Waldorf
240-593
Laurel
240-566
Frederick
240-340
Bethesda
240-394
Mount Airy
240-706
Bethesda
240-424
Hyattsville
240-565
Laurel
240-355
Beltsville
240-599
Rockville
240-525
Upper Marlboro
240-214
Charlotte Hall
240-313
Hagerstown
240-325
Clarksburg
240-318
Clinton
240-722
Sandy Spring
240-429
Silver Spring
240-572
Leonardtn, Maryland
240-232
Hyattsville
240-213
Waldorf
240-870
Frederick
240-293
Hyattsville
240-461
Silver Spring
240-641
Silver Spring
240-754
Waldorf
240-624
Riverdale
240-583
Beltsville
240-523
La Plata
240-412
Waldorf
240-913
Frederick
240-231
Hagerstown
240-669
Hyattsville
240-200
Hyattsville
240-868
Hyattsville
240-383
Bethesda
240-803
Cumberland
240-239
Leonardtown
240-475
Silver Spring
240-667
Hyattsville
240-828
Hyattsville
240-228
Laurel
240-601
Beltsville
240-996
Knoxville
240-275
Grantsville
240-743
Bethesda
240-642
Wsngtnzn10, Maryland
240-426
Bethesda
240-530
Waldorf
240-468
Hyattsville
240-483
Bethesda
240-403
Rockville
240-554
Laurel
240-823
Brandywine
240-347
Hagerstown
240-570
Dayton
240-867
Silver Spring
240-541
Bethesda
240-847
Bethesda
240-392
Hyattsville
240-762
Hyattsville
240-390
Sandy Spring
240-815
Frederick
240-724
Hyattsville
240-302
Laurel
240-281
Bethesda
240-217
Hagerstown
240-463
Silver Spring
240-292
Silver Spring
240-621
Silver Spring
240-783
Bethesda
240-713
Laurel
240-536
Sandy Spring
240-282
Charlotte Hall
240-469
Hagerstown
240-630
Hyattsville
240-602
Beltsville
240-257
Nanjemoy
240-331
Hyattsville
240-770
Hyattsville
240-334
Glenn Dale
240-731
Rockville
240-694
Bethesda
240-457
Frederick
240-588
Grantsvl, Maryland
240-610
Wshngtnzn4, Maryland
240-727
Cumberland
240-220
Poolesville
240-222
Waldorf
240-315
Frederick
240-352
La Plata
240-598
Hughesvl, Maryland
240-373
Odenton
240-595
Bethesda
240-539
Hyattsville
240-658
Gaithersbg, Maryland
240-521
Bethesda
240-584
Laurel236, Maryland
240-305
Beltsville
240-705
Bethesda
240-680
Frederick, Maryland
240-788
Hyattsville
240-686
Gaithersburg
240-358
Clarksburg
240-576
Washington
240-242
Bethesda
240-577
Leonardtown
240-338
Silver Spring
240-436
Ijamsville
240-297
Riverdale
240-505
Silver Spring
240-917
Laurel
240-407
Upper Marlboro
240-740
Bethesda
240-361
Gaithersburg
240-496
Leonardtown
240-490
Middletown
240-833
Bethesda
240-345
Sandy Spring
240-712
Columbia
240-359
Indian Head
240-772
Frederick
240-435
Waldorf
240-271
Bethesda
240-441
Temple Hills
240-582
Hyattsville
240-401
Rockville
240-575
Frederick
240-774
Lonaconing
240-684
Riverdale
240-558
Silver Spring
240-645
Bethesda
240-204
Bethesda
240-659
Ashton236, Maryland
240-482
Bethesda
240-317
Callaway
240-612
Hyattsville
240-519
Bethesda
240-616
Riverdale
240-201
Ridge
240-760
Takoma Park
240-837
Hughesville
240-437
Sandy Spring
240-592
Laurel
240-687
Silver Spring
240-416
Waldorf
240-454
Gaithersburg
240-504
Silver Spring
240-420
Hagerstown
240-657
Frederick
240-290
Hyattsville
240-540
Ellicott City
240-646
Laurel
240-596
Ashton236, Maryland
240-781
Takoma Park
240-563
Capitol Heights
240-985
Williamsport
240-417
Capitol Heights
240-559
Sandy Spring
240-718
Callaway
240-449
Gaithersburg
240-516
Silver Spring
240-594
Bittinger, Maryland
240-662
Silver Spring
240-637
Wshngtnzn3, Maryland
240-350
Beltsville
240-546
Clinton
240-470
Laurel
240-404
Gaithersburg
240-585
Waldorf
240-485
Bethesda
240-840
Frederick, Maryland
240-244
Bethesda
240-339
Upper Marlboro
240-818
Smithsburg
240-207
Clarksburg
240-440
Frederick
240-256
Leonardtown
240-903
Indian Head
240-492
Capitol Heights
240-656
Frederick, Maryland
240-248
Ridge
240-251
Cascade
240-805
Gaithersburg
240-877
Frederick
240-787
Brandywine
240-675
Myersville
240-364
Gaithersburg
240-357
Frederick
240-780
Gaithersburg
240-626
Frederick
240-285
Frederick
240-415
Frederick
240-267
Hagerstown
240-618
Rockville
240-288
Thurmont
240-971
Frederick
240-520
Hagerstown
240-988
Beltsville
240-479
Temple Hills
240-337
Hyattsville
240-752
Bethesda
240-389
Sandy Spring
240-230
Hughesville
240-773
Rockville
240-249
Charlotte Hall
240-672
Rockville
240-465
Hyattsville
240-215
Frederick
240-650
Bethesda
240-377
Indian Head
240-224
Gaithersburg
240-925
Leonardtown
240-550
Rockville
240-660
Rockville
240-427
Waldorf
240-676
Silver Spring
240-673
Wshngtnzn2, Maryland
240-332
Issue
240-683
Gaithersburg
240-291
Hagerstown
240-708
Columbia
240-845
Bethesda
240-765
Bethesda
240-321
Oakland
240-744
Hyattsville
240-378
Cumberland
240-498
Beltsville
240-464
Chevy Chase
240-327
Gaithersburg
240-216
Waldorf
240-205
Bethesda
240-425
Bethesda
240-235
Bethesda
240-841
Laurel
240-552
Rockville
240-316
Bethesda
240-704
Hyattsville
240-679
Friendsvl, Maryland
240-369
Mount Airy
240-838
Capitol Heights
240-276
Rockville
240-261
Gaithersburg
240-538
Leonardtown
240-569
Allegany
240-653
Laurel238, Maryland
240-806
Indian Head
240-362
Cumberland
240-480
Bethesda
240-343
Hancock
240-500
Hagerstown
240-690
Gaithersburg
240-477
Gaithersburg
240-986
Nanjemoy
240-387
Bethesda
240-423
Silver Spring
240-644
Bethesda
240-274
Bethesda
240-655
Garrett
240-203
Hagerstown
240-790
Hyattsville
240-421
Rockville
240-800
Bethesda
240-534
Bethesda
240-764
Bethesda
240-677
Wshngtnzn5, Maryland
240-597
Gaithersburg
240-353
Beltsville
240-668
Clarksburg
240-262
Callaway
240-336
Bethesda
240-620
Rockville
240-515
Bethesda
240-839
Bethesda
240-564
Columbia
240-699
Frederick
240-296
Hyattsville
240-778
Bethesda
240-603
Beltsville
240-391
Riverdale
240-243
Gaithersburg
240-920
Cumberland
240-755
Laurel
240-384
Callaway
240-459
Laurel
240-366
Williamsport
240-250
Brandywine
240-324
Dayton
240-310
Hagerstown
240-617
Hagerstown
240-648
Keedysvl, Maryland
240-545
Upper Marlboro
240-266
Hyattsville
240-900
Hyattsville
240-322
Westernport
240-855
Bethesda
240-365
Clarksburg
240-723
Silver Spring
240-771
Poolesville
240-766
Bethesda
240-289
Temple Hills
240-346
Waldorf
240-625
Hagerstown
240-409
Frederick
240-627
Silver Spring
240-918
Sandy Spring
240-379
Frederick
240-850
Hagerstown
240-252
Gaithersburg
240-501
Silver Spring
240-374
Laurel
240-587
Leonardtown
240-674
Frederick
240-678
Silver Spring
240-999
Wshngtnzn3, Maryland
240-777
Rockville
240-714
Hyattsville
240-356
Frederick
240-495
Hyattsville
240-720
Gaithersburg
240-661
Callaway
240-844
Ridge
240-681
Brandywine
240-561
Leonardtown
240-414
Hyattsville
240-707
Hagerstown
240-348
Clinton
240-897
Hyattsville
240-320
Waldorf
240-442
Oakland
240-386
Gaithersburg
240-399
Bethesda
240-636
Laurel
240-269
Hyattsville
240-466
Charlotte Hall
240-474
Gaithersburg
240-326
Upper Marlboro
240-685
Upper Marlboro
240-915
Frederick
240-382
Hagerstown
240-279
Waldorf
240-246
Gaithersburg
240-912
Gaithersburg
240-263
Bethesda
240-878
Washington
240-439
Frederick
240-508
Capitol Heights
240-682
Waldorf
240-234
Mount Rainier
240-514
Bethesda
240-556
Glenn Dale
240-775
Luke
240-816
Hagerstown
240-734
Hagerstown
240-716
Capitol Heights
240-671
Hyattsville
240-842
Glenn Dale
240-476
Silver Spring
240-544
Glenn Dale
240-619
Bethesda
240-802
Mount Rainier
240-509
Gambrills
240-607
Upper Marlboro
240-629
Frederick
240-528
Hughesville
240-405
Frederick
240-206
Glenn Dale
240-998
Hancock
240-456
Laurel
240-221
Rockville
240-433
Silver Spring
240-526
Leonardtown
240-858
Bethesda
240-695
Temple Hills
240-786
Laurel
240-863
Laurel
240-537
Washington
240-431
Callaway
240-218
Nanjemoy
240-725
Patuxent River
240-965
Riverdale
240-458
Waldorf
240-497
Bethesda
240-395
Bethesda
240-688
Silver Spring
240-328
Rockville
240-422
Frederick
240-489
Poolesville
240-413
Hyattsville
240-665
Bethesda
240-342
Sandy Spring
240-976
Damascs236, Maryland
240-529
Frederick
240-929
Hyattsville
240-450
Silver Spring
240-418
Beltsville
240-586
Frederick
240-446
Frederick
240-808
Leonardtown
240-455
Capitol Heights
240-484
Laurel
240-381
Silver Spring
240-419
Waldorf
240-408
Rockville
240-460
Silver Spring
240-970
Silver Spring
240-330
Bethesda
240-862
Mount Savage
240-307
Emmitsburg
240-628
Mechancsvl, Maryland
240-452
Hagerstown
240-938
Ashton
240-354
Beltsville
240-859
Dayton
240-308
Clarksburg
240-567
Rockville
240-309
Silver Spring
240-241
Bethesda
240-400
Bethesda
240-518
Waldorf
240-448
Waldorf
240-692
Grantsvl, Maryland
240-666
Nanjemoy
240-964
Cumberland
240-846
Clinton
240-341
Frederick
240-864
Rockville
240-579
Ashton236, Maryland
240-277
Bethesda
240-255
Poolesville
240-750
Gaithersburg
240-312
Capitol Heights
240-376
Hughesville
240-825
Hyattsville
240-715
Rockville
240-615
Hyattsville
240-236
Frederick
240-751
Gaithersburg
240-488
Oakland
240-319
Columbia
240-306
Gaithersburg
240-527
Hagerstown
240-367
Frederick
240-562
Gaithersburg
240-949
Hyattsville
240-210
Waldorf
240-273
Hyattsville
240-398
Bethesda
240-280
Laurel
240-848
Gaithersburg
240-380
Bethesda
240-397
Frederick
240-286
Bethesda
240-402
Riverdale
240-219
Ridge
240-225
Frederick
240-370
Bethesda
240-763
Owings
240-532
Hyattsville
240-396
Bethesda
240-434
Leonardtown
240-471
Silver Spring
240-486
Glenn Dale
240-860
Cumberland
240-907
Rockville
240-831
Frederick
240-632
Gaithersburg
240-284
Frostburg
240-663
Middletown, Maryland
240-283
Silver Spring
240-906
Hyattsville
240-691
Upper Marlboro
240-776
La Plata
240-237
Callaway
240-245
Glenn Dale
240-375
Capitol Heights
240-272
Bethesda
240-747
Hyattsville
240-784
Myersville
240-651
Frederick
240-209
Indian Head
240-600
Hyattsville
240-639
Laurel236, Maryland
240-604
Beltsville
240-880
Bethesda
240-438
Silver Spring
240-462
Beltsville
240-883
Sandy Spring
240-640
Waldorf
240-993
Indian Head
240-542
Riverdale
240-549
Frederick
240-994
Rockville
240-388
Gaithersburg
240-613
Hyattsville
240-908
Frederick
240-506
Rockville
240-507
Bethesda
240-830
Capitol Heights
240-904
Columbia
240-581
Laurel
240-503
Issue
240-979
Cumberland
240-614
Rockville
240-631
Gaithersburg
240-589
Mccoole, Maryland
240-547
Laurel
240-826
Rockville
240-901
La Plata
240-804
Issue
240-481
Silver Spring
240-432
Beltsville
240-278
Laurel
240-670
Hyattsville
240-212
Oakland
240-360
Laurel
240-494
Hyattsville
240-757
Hyattsville
240-254
Hughesville
240-606
Beltsville
240-487
Hyattsville
240-517
Columbia
240-287
Hancock
240-344
Frederick
240-689
Wsng236z15, Maryland
240-553
Hyattsville
240-856
Columbia
240-643
Silver Spring
240-810
Bethesda
240-299
Waldorf
240-323
Emmitsburg
240-406
Rockville
240-560
Bethesda
240-467
Temple Hills
240-453
Rockville
240-664
Cumberland, Maryland
240-568
Laurel
240-865
Halethorpe
240-371
Hyattsville
240-623
Hyattsville
240-294
Laurel
240-349
La Plata
240-393
Bethesda
240-491
Silver Spring
240-533
Hyattsville
240-548
Hyattsville
240-573
Upper Marlboro
240-368
Waldorf
240-499
Bethesda
240-335
Glenn Dale
240-473
Riverdale
240-726
Poolesvl, Maryland
240-635
Tompkinsvl, Maryland
240-524
Laurel
240-303
Clinton
240-779
Sandy Spring
240-208
La Plata
240-258
Ridge
240-817
Sandy Spring
240-608
Frederick
240-654
Gaithersburg
240-270
Waldorf
240-472
Silver Spring
240-333
Hyattsville
240-260
Hyattsville
240-758
Laurel
240-899
Bethesda
240-298
Leonardtown
240-794
Callaway
240-893
Silver Spring
240-268
Rockville
240-898
Hyattsville
240-767
Capitol Heights
240-253
Upper Marlboro
240-372
Gaithersburg
240-445
Bethesda
240-522
Cumberland
240-622
La Plata, Maryland
240-493
Temple Hills
240-609
Cumberland
240-590
Wsngtnzn12, Maryland
240-793
Gaithersburg
240-238
Rockville
240-732
Mount Airy
240-363
Silver Spring
240-535
Silver Spring
240-888
Rockville
240-719
Capitol Heights
240-997
Silver Spring
240-737
Hyattsville
240-633
Hughesville
240-857
Hyattsville
240-892
Upper Marlboro
240-638
Hyattsville
240-385
Myersville
240-702
Gaithersburg
240-428
Rockville
240-430
Silver Spring
240-821
Silver Spring
240-578
Frederick