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Where Is 840 Area Code?

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Database Updated: May 9, 2025
California Phone Number Lookups
Where Is 840 Area Code?
Cities in 840 Area Code
  • Chino
  • Chino Hills
  • Colton
  • Diamond Bar
  • Fontana
  • Highland
  • Ontario
  • Pomona
  • Rancho Cucamonga
  • Redlands
  • Rialto
  • San Bernardino
  • Upland
  • Yucaipa
Counties in 840 Area Code
  • Los Angeles
  • Riverside
  • San Bernardino
Prefix Codes for Area Code 840
  • (840) 200
  • (840) 201
  • (840) 202
  • (840) 203
  • (840) 204
  • (840) 205
  • (840) 206
  • (840) 207
  • (840) 208
  • (840) 209
  • (840) 210
  • (840) 212
  • (840) 215
  • (840) 216
  • (840) 219
  • (840) 222
  • (840) 234
  • (840) 252
  • (840) 300
  • (840) 333
  • (840) 336
  • (840) 345
  • (840) 356
  • (840) 400
  • (840) 444
  • (840) 465
  • (840) 466
  • (840) 500
  • (840) 587
  • (840) 588
  • (840) 600
  • (840) 666
  • (840) 677
  • (840) 688
  • (840) 699
  • (840) 777
  • (840) 788
  • (840) 799
  • (840) 800
  • (840) 837
California Area Codes
  • 209
  • 213
  • 279
  • 310
  • 323
  • 341
  • 408
  • 415
  • 424
  • 442
  • 510
  • 530
  • 559
  • 562
  • 619
  • 626
  • 628
  • 650
  • 657
  • 661
  • 669
  • 707
  • 714
  • 747
  • 760
  • 805
  • 818
  • 820
  • 831
  • 840
  • 858
  • 909
  • 916
  • 925
  • 949
  • 951
California Phone Numbers
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