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Where Is 840 Area Code?
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Area code
-XXX-
Prefix Code:
-XXX-
Subscriber Number:
-XX-
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Databases Updated: March 29, 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
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