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Area Code 831

Browse available prefixes, locations, carriers, and quick path links into deeper phone number pages for this area code. Area-code research is one of the most important parts of reverse phone lookup because it gives visitors a geographic starting point before they inspect a full number.

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200Prefixes Listed
CaliforniaLocation
United StatesCountry
831Area Code
Area Code Overview
Area Code831
Primary LocationCalifornia
CountryUnited States
Prefix Coverage200 listed prefixes
Prefixes in 831
831-203
Salinas
American Messaging Services Llc
Landline
831-204
Monterey
Ymax Communications Corp. - Ca
Landline
831-205
Monterey
Teleport Communications Group - San Francisco
Landline
831-206
Salinas
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-207
Salinas
Sprint Spectrum L.p.
Wireless
831-210
Salinas
T-mobile Usa Inc.
Wireless
831-212
San Jose
Sprint Spectrum L.p.
Wireless
831-214
Salinas
New Cingular Wireless Pcs Llc
Wireless
831-216
San Francisco
Teleport Communications Group - San Francisco
Landline
831-217
San Jose
Teleport Communications Group - San Francisco
Landline
831-218
San Jose
Teleport Communications Group - San Francisco
Landline
831-219
San Jose
Teleport Communications Group - San Francisco
Landline
831-221
Salinas
O1 Communications Inc. - Ca
Landline
831-222
San Jose
U.s. Telepacific Corp. - Ca
Landline
831-223
Salinas
Pac - West Telecomm Inc.
Landline
831-224
Salinas
T-mobile Usa Inc.
Wireless
831-227
Sunnyvale
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-229
Salinas
New Cingular Wireless Pcs Llc
Wireless
831-232
Salinas
O1 Communications Inc. - Ca
Landline
831-233
Salinas
Level 3 Communications Llc - Ca
Landline
831-234
Sunnyvale
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-235
Salinas
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-236
Salinas
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-237
Salinas
O1 Communications Inc. - Ca
Landline
831-238
Salinas
New Cingular Wireless Pcs Llc
Wireless
831-239
Santa Clara
New Cingular Wireless Pcs Llc
Wireless
831-240
Salinas
T-mobile Usa Inc.
Wireless
831-241
Salinas
At&t Local
Landline
831-242
Monterey
Pacific Bell
Landline
831-244
Salinas
O1 Communications Inc. - Ca
Landline
831-245
Salinas
O1 Communications Inc. - Ca
Landline
831-246
Sunnyvale
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-247
Sunnyvale
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-249
Salinas
Sbc Internet Services Inc.
Landline
831-250
Salinas
O1 Communications Inc. - Ca
Landline
831-251
Santa Clara
New Cingular Wireless Pcs Llc
Wireless
831-252
Santa Clara
New Cingular Wireless Pcs Llc
Wireless
831-254
Santa Clara
New Cingular Wireless Pcs Llc
Wireless
831-255
San Francisco
North County Communications Corp. - Ca
Landline
831-261
Salinas
New Cingular Wireless Pcs Llc
Wireless
831-262
Salinas
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-263
Salinas
O1 Communications Inc. - Ca
Landline
831-264
Salinas
O1 Communications Inc. - Ca
Landline
831-265
Salinas
Sbc Internet Services Inc.
Landline
831-267
Salinas
Mpower Networks Services Inc. - Ca
Landline
831-269
Salinas
Teleport Communications Group - San Francisco
Landline
831-272
Salinas
Cf Communications Llc Dba Telekenex - Ca
Landline
831-274
San Jose
Broadwing Communications Llc - Ca
Landline
831-275
Monterey
Bandwidth.com Clec Llc - Ca
Landline
831-277
Salinas
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-278
Sunnyvale
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-281
Oakland
Cook Telecom Inc.
Landline
831-282
Oakland
Cook Telecom Inc.
Landline
831-283
Salinas
Cook Telecom Inc.
Landline
831-284
Salinas
Cook Telecom Inc.
Landline
831-285
Salinas
Cook Telecom Inc.
Landline
831-286
Salinas
Cook Telecom Inc.
Landline
831-287
Monterey
Ymax Communications Corp. - Ca
Landline
831-288
San Francisco
Charter Fiberlink Ca-cco Llc - Ca
Landline
831-290
Salinas
U.s. Telepacific Corp. - Ca
Landline
831-293
Salinas
Tw Telecom Of California Lp - Ca
Landline
831-295
Oakland
T-mobile Usa Inc.
Wireless
831-296
Monterey
Level 3 Communications Llc - Ca
Landline
831-297
Salinas
T-mobile Usa Inc.
Wireless
831-298
Salinas
O1 Communications Inc. - Ca
Landline
831-299
Salinas
Pac - West Telecomm Inc.
Landline
831-300
Salinas
Pac - West Telecomm Inc.
Landline
831-301
Salinas
Pac - West Telecomm Inc.
Landline
831-302
Salinas
Pac - West Telecomm Inc.
Landline
831-303
Salinas
Pac - West Telecomm Inc.
Landline
831-304
Salinas
Pac - West Telecomm Inc.
Landline
831-305
Salinas
Pac - West Telecomm Inc.
Landline
831-306
Salinas
Pac - West Telecomm Inc.
Landline
831-307
Salinas
Pac - West Telecomm Inc.
Landline
831-308
Salinas
Pac - West Telecomm Inc.
Landline
831-309
Salinas
Pac - West Telecomm Inc.
Landline
831-313
Salinas
Charter Fiberlink Ca-cco Llc - Ca
Landline
831-316
San Francisco
Allegiance Telecom Inc. - Ca
Landline
831-319
Santa Clara
Allegiance Telecom Inc. - Ca
Landline
831-320
Salinas
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-324
Salinas
Comcast Phone Of California Llc - Ca
Landline
831-325
Santa Clara
Sprint Spectrum L.p.
Wireless
831-331
Sunnyvale
New Cingular Wireless Pcs Llc
Wireless
831-332
Santa Clara
New Cingular Wireless Pcs Llc
Wireless
831-333
Monterey
Pacific Bell
Landline
831-334
Santa Clara
New Cingular Wireless Pcs Llc
Wireless
831-335
Felton
Pacific Bell
Landline
831-336
Ben Lomond
Pacific Bell
Landline
831-337
San Jose
Mci Worldcom Communications Inc. Ca
Landline
831-338
Boulder Creek
Pacific Bell
Landline
831-345
Sunnyvale
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-350
Salinas
Level 3 Communications Llc - Ca
Landline
831-359
Sunnyvale
Level 3 Communications Llc - Ca
Landline
831-372
Monterey
Pacific Bell
Landline
831-373
Monterey
Pacific Bell
Landline
831-375
Monterey
Pacific Bell
Landline
831-382
San Lucas
Pacific Bell
Landline
831-383
Salinas
Metro Pcs Inc.
Landline
831-384
Marina
Pacific Bell
Landline
831-385
King City
Pacific Bell
Landline
831-386
King City
Pacific Bell
Landline
831-387
Salinas
Pac - West Telecomm Inc.
Landline
831-389
Paicines
Pinnacles Telephone Co.
Landline
831-392
Seaside
Pacific Bell
Landline
831-393
Seaside
Pacific Bell
Landline
831-394
Seaside
Pacific Bell
Landline
831-401
San Francisco
Broadwing Communications Llc - Ca
Landline
831-402
Salinas
New Cingular Wireless Pcs Llc
Wireless
831-406
Oakland
T-mobile Usa Inc.
Wireless
831-417
Salinas
Pac - West Telecomm Inc.
Landline
831-418
Oakland
American Messaging Services Llc
Landline
831-419
Santa Clara
New Cingular Wireless Pcs Llc
Wireless
831-420
Santa Cruz
Pacific Bell
Landline
831-421
Santa Cruz
Pacific Bell
Landline
831-422
Salinas
Pacific Bell
Landline
831-423
Santa Cruz
Pacific Bell
Landline
831-424
Salinas
Pacific Bell
Landline
831-425
Santa Cruz
Pacific Bell
Landline
831-426
Santa Cruz
Pacific Bell
Landline
831-427
Santa Cruz
Pacific Bell
Landline
831-428
Santa Clara
Sprint Spectrum L.p.
Wireless
831-429
Santa Cruz
Pacific Bell
Landline
831-430
Scotts Valley
Pacific Bell
Landline
831-431
Scotts Valley
Pacific Bell
Landline
831-435
San Francisco
Pacific Bell
Landline
831-438
Scotts Valley
Pacific Bell
Landline
831-439
Scotts Valley
Pacific Bell
Landline
831-440
Scotts Valley
Pacific Bell
Landline
831-442
Salinas
Pacific Bell
Landline
831-443
Salinas
Pacific Bell
Landline
831-444
Salinas
Pacific Bell
Landline
831-449
Salinas
Pacific Bell
Landline
831-453
Salinas
Sbc Internet Services Inc.
Landline
831-454
Santa Cruz
Pacific Bell
Landline
831-455
Salinas
Pacific Bell
Landline
831-457
Santa Cruz
Pacific Bell
Landline
831-458
Santa Cruz
Pacific Bell
Landline
831-459
Santa Cruz
Pacific Bell
Landline
831-460
Santa Cruz
Pacific Bell
Landline
831-461
Scotts Valley
Pacific Bell
Landline
831-462
Santa Cruz
Pacific Bell
Landline
831-464
Santa Cruz
Pacific Bell
Landline
831-465
Santa Cruz
Pacific Bell
Landline
831-466
Santa Cruz
Pacific Bell
Landline
831-469
Santa Cruz
Pacific Bell
Landline
831-471
Santa Cruz
Pacific Bell
Landline
831-475
Santa Cruz
Pacific Bell
Landline
831-476
Santa Cruz
Pacific Bell
Landline
831-477
Santa Cruz
Pacific Bell
Landline
831-479
Santa Cruz
Pacific Bell
Landline
831-480
Oakland
Pac - West Telecomm Inc.
Landline
831-484
Salinas
Pacific Bell
Landline
831-498
San Francisco
O1 Communications Inc. - Ca
Landline
831-502
Santa Cruz
Pacific Bell
Landline
831-508
San Francisco
O1 Communications Inc. - Ca
Landline
831-512
Salinas
Sprint Spectrum L.p.
Wireless
831-515
San Jose
Mpower Communications Corp - Ca
Landline
831-520
Salinas
American Messaging Services Llc
Landline
831-521
Salinas
New Cingular Wireless Pcs Llc
Wireless
831-524
Salinas
New Cingular Wireless Pcs Llc
Wireless
831-525
Salinas
Pac - West Telecomm Inc.
Landline
831-531
Fremont
Xo California Inc.
Landline
831-532
Fremont
Xo California Inc.
Landline
831-533
Fremont
Xo California Inc.
Landline
831-534
Fremont
Xo California Inc.
Landline
831-535
Fremont
Xo California Inc.
Landline
831-536
Fremont
Xo California Inc.
Landline
831-537
Salinas
Pac - West Telecomm Inc.
Landline
831-539
Santa Clara
Sprint Spectrum L.p.
Wireless
831-540
Salinas
O1 Communications Inc. - Ca
Landline
831-560
Oakland
American Messaging (am) Inc.
Landline
831-566
Sunnyvale
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-572
Oakland
The Telephone Connection Local Services Llc
Landline
831-574
Salinas
Pac - West Telecomm Inc.
Landline
831-576
Oakland
Pac - West Telecomm Inc.
Landline
831-578
Salinas
New Cingular Wireless Pcs Llc
Wireless
831-580
Salinas
O1 Communications Inc. - Ca
Landline
831-582
Marina
Pacific Bell
Landline
831-583
Seaside
Pacific Bell
Landline
831-585
Salinas
Sprint Spectrum L.p.
Wireless
831-586
Salinas
O1 Communications Inc. - Ca
Landline
831-588
Sunnyvale
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-593
Salinas
Pac - West Telecomm Inc.
Landline
831-594
Salinas
New Cingular Wireless Pcs Llc
Wireless
831-595
Salinas
New Cingular Wireless Pcs Llc
Wireless
831-596
Salinas
New Cingular Wireless Pcs Llc
Wireless
831-597
Salinas
Pac - West Telecomm Inc.
Landline
831-598
Salinas
Cook Telecom Inc.
Landline
831-600
San Jose
U.s. Telepacific Corp. - Ca
Landline
831-601
Salinas
Cellco Partnership Dba Verizon Wireless - Ca
Wireless
831-603
Oakland
Pac - West Telecomm Inc.
Landline
831-604
Oakland
Pac - West Telecomm Inc.
Landline
831-607
San Francisco
O1 Communications Inc. - Ca
Landline
831-609
San Francisco
O1 Communications Inc. - Ca
Landline
831-610
San Francisco
O1 Communications Inc. - Ca
Landline
831-612
San Francisco
Broadwing Communications Llc - Ca
Landline
831-613
Salinas
Pac - West Telecomm Inc.
Landline
831-618
Oakland
Pac - West Telecomm Inc.
Landline
831-620
Carmel
Pacific Bell
Landline
831-621
San Francisco
Broadwing Communications Llc - Ca
Landline

Top prefixes in this area code

831-203→831-204→831-205→831-206→831-207→831-210→831-212→831-214→
Why area code pages matter in reverse phone lookup

Area code pages help visitors understand the wider calling region connected to a number. While a full reverse phone lookup page focuses on one specific caller, an area code page shows the bigger picture by grouping prefixes, cities, and carrier patterns under the same first three digits. This makes it easier to spot whether a number appears local, regional, or part of a service area the visitor already recognizes.

For phone directory websites, area code pages also improve browsing. A user can start with a missed call, discover the number's first three digits, and then move into the related area code to see supporting location data and a list of active prefixes. That layered navigation creates a better research experience and gives visitors more confidence when they continue into a specific number page.