Area code 840
Where is area code 840?
San Bernardino, Pomona and Lake Arrowhead, California
Local time: … (Pacific Time)
840 is a newer area code, in service since February 23, 2021, added on top of 909. See all new area codes.
| State | California |
|---|---|
| Country | United States |
| Main cities | San Bernardino, Pomona and Lake Arrowhead |
| Time zone | Pacific Time |
| Overlay area codes | 909 |
| In service since | 2021 (created from 909) |
| Assigned prefixes | 130 |
| Dialing format | (840) XXX-XXXX · +1 840 XXX XXXX from abroad |
Look up a 840 number
Cities and towns in area code 840
Listed by how many phone prefixes (the 3 digits after the area code) are assigned to each place in 840.
- San Bernardino, CA (21)
- Pomona, CA (16)
- Lake Arrowhead, CA (14)
- Fontana, CA (12)
- Rancho Cucamonga, CA (10)
- Chino, CA (9)
- Ontario, CA (8)
- San Dimas, CA (8)
- Colton, CA (6)
- Highland, CA (5)
- Redlands, CA (5)
- Rialto, CA (5)
- Walnut, CA (4)
- Yucaipa, CA (3)
- Mentone, CA (2)
- Big Bear, CA (1)
- Crestline, CA (1)
Phone companies in area code 840
The carriers that hold the most 840 prefixes. People can move their number to another carrier, so this shows who first issued a number, not who serves it today.
| Prefixes | Carrier |
|---|---|
| 32 | T-Mobile USA |
| 26 | Fractel |
| 23 | Onvoy |
| 18 | New Cingular Wireless PCS (AT&T) |
| 13 | Verizon Wireless |
| 4 | Bandwidth.com CLEC |
| 3 | Onvoy Spectrum (Charter Spectrum) |
| 3 | Terra Nova Telecom |
All 130 prefixes in area code 840
Pick the 3 digits after the area code to see that prefix’s city and carrier.
- 200
- 201
- 202
- 203
- 204
- 205
- 206
- 207
- 208
- 209
- 210
- 212
- 213
- 214
- 215
- 216
- 217
- 218
- 219
- 220
- 221
- 222
- 223
- 224
- 225
- 226
- 227
- 228
- 229
- 230
- 231
- 232
- 233
- 234
- 235
- 236
- 237
- 238
- 239
- 240
- 241
- 242
- 243
- 244
- 245
- 246
- 247
- 248
- 249
- 250
- 251
- 252
- 253
- 254
- 255
- 256
- 257
- 258
- 259
- 260
- 261
- 262
- 263
- 264
- 265
- 266
- 267
- 268
- 269
- 270
- 271
- 272
- 273
- 274
- 275
- 276
- 277
- 278
- 279
- 280
- 281
- 282
- 283
- 284
- 285
- 286
- 287
- 288
- 289
- 290
- 291
- 292
- 293
- 294
- 295
- 296
- 299
- 300
- 333
- 336
- 345
- 356
- 400
- 444
- 465
- 466
- 500
- 587
- 588
- 600
- 666
- 677
- 688
- 699
- 777
- 788
- 799
- 800
- 804
- 837
- 840
- 877
- 888
- 899
- 900
- 977
- 996
- 997
- 998
- 999
Area codes that overlay 840
Questions
- Where is area code 840?
- Area code 840 is in California. It serves San Bernardino, Pomona, Lake Arrowhead, Fontana and Rancho Cucamonga and 12 other cities and towns.
- What time zone is area code 840 in?
- Area code 840 uses Pacific Time.
- What area codes overlay 840?
- 909 serves the same area as 840. New numbers in the area can get any of these codes, which is why local calls need all 10 digits.
- Is a call from area code 840 a scam?
- The area code alone doesn’t tell you. Most calls from 840 are ordinary local calls, but scammers can fake (“spoof”) any number. If you don’t recognize a 840 number, let it go to voicemail.
- When did area code 840 start?
- 840 went into service in 2021. It was created from area code 909.
- Can a 840 number be outside California?
- Yes. People keep their numbers when they move and when they switch to mobile or internet phone services, so a 840 caller can be anywhere.
Other area codes in California
| Area code | Main cities |
|---|---|
| 209 | Stockton, Modesto and Merced |
| 213 | Lsan Da 01, Los Angeles and Lsan Da 10 |
| 279 | Sacramento, Folsom and Elk Grove |
| 310 | Los Angeles, Gardena and Beverly Hills |
| 323 | Los Angeles, Montebello and South Gate |
| 341 | Fremont, Oakland and Hayward |
| 350 | Stockton, Modesto and Atwater |
| 357 | Clovis, Firebaugh and Fresno |
| 369 | Santa Rosa, Clearlake and Fairfield |
| 408 | San Jose, Sunnyvale and Campbell |
| 415 | San Francisco, San Rafael and Novato |
| 424 | Los Angeles, Torrance and Beverly Hills |
| 442 | Victorville, Palm Springs and Indio |
| 510 | Oakland, Fremont and Hayward |
| 530 | Chico, Redding and Yuba City |
| 559 | Fresno, Visalia and Clovis |
| 562 | Long Beach, Bellflower and Downey |
| 619 | San Diego, Chula Vista and El Cajon |
| 626 | Alhambra, Pasadena and Covina |
| 628 | San Francisco, San Rafael and Novato |
| 650 | Palo Alto, San Mateo and Mountain View |
| 657 | Anaheim, Huntington Beach and Santa Ana |
| 661 | Bakersfield, Palmdale and Valencia |
| 669 | San Jose, Campbell and Sunnyvale |
| 707 | Santa Rosa, Fairfield and Vallejo |
| 714 | Anaheim, Santa Ana and Orange |
| 738 | Los Angeles, South Gate and Lsan Da 01 |
| 747 | Burbank, Calabasas and Glendale |
| 760 | Palm Springs, Vista and Escondido |
| 805 | Oxnard, Santa Barbara and Thousand Oaks |
| 818 | Van Nuys, Calabasas and Burbank |
| 820 | Camarillo, Oxnard and Newbury Park |
| 831 | Salinas, Santa Cruz and Monterey |
| 837 | Redding, Auburn and Chico |
| 858 | San Diego, Poway and Chula Vista |
| 916 | Sacramento, Roseville and Folsom |
| 925 | Walnut Creek, Concord and Pleasanton |
| 949 | Irvine, Aliso Viejo and Newport Beach |
| 951 | Riverside, Corona and Temecula |