Area Code Detail

Area Code 840

California (southwestern San Bernardino County and a small portion of Los Angeles and Riverside counties, including Fontana, Pomona, Chino Hills, Claremont, Chino, Ontario, and Redlands) · In service since February 23, 2021

CA
Reports, 30 Days 88

Recent FCC and FTC complaint records tied to this area code.

Reports, 180 Days 603

Broader complaint volume used to prioritize indexable pages.

Active Prefixes 135

Distinct NPA-NXX prefixes surfaced from routing and assignment data.

Carriers / Assignees 21

Named carriers, assignees, or code holders found in routing data.

Cities / Rate Centers 19

Distinct cities or rate centers attached to this area code.

States / Territories 1

Coverage footprint visible from NANPA, pooled block, and Canada routing data.

North American Phone Intelligence

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Overview

What this area code covers

California (southwestern San Bernardino County and a small portion of Los Angeles and Riverside counties, including Fontana, Pomona, Chino Hills, Claremont, Chino, Ontario, and Redlands)

overlaid on 909

Common cities and rate centers

Arrowhead Big Bear City Calimesa Chino Claremont Colton Crestline Diamond Bar Etiwanda Fontana Highland Marshall Mentone Ontario Pomona Redlands Rialto San Bernardino

Top carriers and assignees

  • T-MOBILE USA, INC. · 300 routing rows
  • NEW CINGULAR WIRELESS PCS, LLC · 266 routing rows
  • ONVOY, LLC - CA · 261 routing rows
  • CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA · 209 routing rows
  • COMMIO, LLC · 65 routing rows
  • FRACTEL, LLC · 64 routing rows
  • BANDWIDTH.COM CLEC, LLC - CA · 47 routing rows
  • ONVOY SPECTRUM, LLC · 44 routing rows
  • TELNYX LLC · 19 routing rows
  • PEERLESS NETWORK OF CALIFORNIA, LLC - CA · 15 routing rows
  • MULTIPLE OCN LISTING · 9 routing rows
  • BOOST SUBSCRIBERCO L.L.C. · 9 routing rows
NPA-NXX

Prefix directory inside area code 840

Each prefix below is collapsed to one primary locality row so you can scan the area code by prefix without the duplicated block-level assignment rows.

Prefix Primary Rate Center Primary City State
840-200-XXXX CHINO Chino CA
840-201-XXXX FONTANA Fontana CA
840-202-XXXX POMONA Pomona CA
840-203-XXXX S BERNDINO San Bernardino CA
840-204-XXXX S BERNDINO San Bernardino CA
840-205-XXXX CLAREMONT Claremont CA
840-206-XXXX CHINO Chino CA
840-207-XXXX ARROWHEAD Arrowhead CA
840-208-XXXX CLAREMONT Claremont CA
840-209-XXXX ARROWHEAD Arrowhead CA
840-210-XXXX FONTANA Fontana CA
840-211-XXXX CA
840-212-XXXX CHINO Chino CA
840-213-XXXX REDLANDS Redlands CA
840-214-XXXX MARSHALL Marshall CA
840-215-XXXX HIGHLAND Highland CA
840-216-XXXX ARROWHEAD Arrowhead CA
840-217-XXXX FONTANA Fontana CA
840-218-XXXX CHINO Chino CA
840-219-XXXX CALIMESA Calimesa CA
840-220-XXXX RIALTO Rialto CA
840-221-XXXX S BERNDINO San Bernardino CA
840-222-XXXX S BERNDINO San Bernardino CA
840-223-XXXX CALIMESA Calimesa CA
840-224-XXXX S BERNDINO San Bernardino CA
840-225-XXXX POMONA Pomona CA
840-226-XXXX POMONA Pomona CA
840-227-XXXX S BERNDINO San Bernardino CA
840-228-XXXX COLTON Colton CA
840-229-XXXX CLAREMONT Claremont CA
840-230-XXXX POMONA Pomona CA
840-231-XXXX POMONA Pomona CA
840-232-XXXX FONTANA Fontana CA
840-233-XXXX ARROWHEAD Arrowhead CA
840-234-XXXX ARROWHEAD Arrowhead CA
840-235-XXXX COLTON Colton CA
840-236-XXXX CLAREMONT Claremont CA
840-237-XXXX ONTARIO Ontario CA
840-238-XXXX POMONA Pomona CA
840-239-XXXX FONTANA Fontana CA
840-240-XXXX DIAMONDBAR Diamond Bar CA
840-241-XXXX RIALTO Rialto CA
840-242-XXXX UPLAND Upland CA
840-243-XXXX POMONA Pomona CA
840-244-XXXX DIAMONDBAR Diamond Bar CA
840-245-XXXX REDLANDS Redlands CA
840-246-XXXX ETIWANDA Etiwanda CA
840-247-XXXX HIGHLAND Highland CA
840-248-XXXX FONTANA Fontana CA
840-249-XXXX MARSHALL Marshall CA
840-250-XXXX ARROWHEAD Arrowhead CA
840-251-XXXX REDLANDS Redlands CA
840-252-XXXX MENTONE Mentone CA
840-253-XXXX CALIMESA Calimesa CA
840-254-XXXX RIALTO Rialto CA
840-255-XXXX S BERNDINO San Bernardino CA
840-256-XXXX UPLAND Upland CA
840-257-XXXX COLTON Colton CA
840-258-XXXX HIGHLAND Highland CA
840-259-XXXX POMONA Pomona CA
840-260-XXXX POMONA Pomona CA
840-261-XXXX FONTANA Fontana CA
840-262-XXXX ARROWHEAD Arrowhead CA
840-263-XXXX FONTANA Fontana CA
840-264-XXXX POMONA Pomona CA
840-265-XXXX ARROWHEAD Arrowhead CA
840-266-XXXX S BERNDINO San Bernardino CA
840-267-XXXX POMONA Pomona CA
840-268-XXXX MARSHALL Marshall CA
840-269-XXXX ONTARIO Ontario CA
840-270-XXXX ONTARIO Ontario CA
840-271-XXXX FONTANA Fontana CA
840-272-XXXX CHINO Chino CA
840-273-XXXX MENTONE Mentone CA
840-274-XXXX ARROWHEAD Arrowhead CA
840-275-XXXX POMONA Pomona CA
840-276-XXXX UPLAND Upland CA
840-277-XXXX CLAREMONT Claremont CA
840-278-XXXX ARROWHEAD Arrowhead CA
840-279-XXXX ONTARIO Ontario CA
840-280-XXXX S BERNDINO San Bernardino CA
840-281-XXXX COLTON Colton CA
840-282-XXXX CHINO Chino CA
840-283-XXXX ARROWHEAD Arrowhead CA
840-284-XXXX CHINO Chino CA
840-285-XXXX FONTANA Fontana CA
840-286-XXXX ARROWHEAD Arrowhead CA
840-287-XXXX MARSHALL Marshall CA
840-288-XXXX S BERNDINO San Bernardino CA
840-300-XXXX REDLANDS Redlands CA
840-311-XXXX CA
840-333-XXXX POMONA Pomona CA
840-336-XXXX COLTON Colton CA
840-345-XXXX POMONA Pomona CA
840-356-XXXX ARROWHEAD Arrowhead CA
840-400-XXXX ONTARIO Ontario CA
840-411-XXXX CA
840-444-XXXX ARROWHEAD Arrowhead CA
840-465-XXXX CHINO Chino CA
840-466-XXXX UPLAND Upland CA
840-500-XXXX BIGBEAR CY Big Bear City CA
840-511-XXXX CA
840-555-XXXX DIR ASST CA
840-587-XXXX S BERNDINO San Bernardino CA
840-588-XXXX DIAMONDBAR Diamond Bar CA
840-600-XXXX COLTON Colton CA
840-611-XXXX CA
840-666-XXXX FONTANA Fontana CA
840-677-XXXX ETIWANDA Etiwanda CA
840-688-XXXX CRESTLINE Crestline CA
840-699-XXXX ONTARIO Ontario CA
840-700-XXXX CA
840-711-XXXX CA
840-777-XXXX POMONA Pomona CA
840-788-XXXX FONTANA Fontana CA
840-799-XXXX RIALTO Rialto CA
840-800-XXXX UPLAND Upland CA
840-804-XXXX CLAREMONT Claremont CA
840-811-XXXX CA
840-837-XXXX POMONA Pomona CA
840-840-XXXX ONTARIO Ontario CA
840-877-XXXX MARSHALL Marshall CA
840-888-XXXX REDLANDS Redlands CA
840-899-XXXX HIGHLAND Highland CA
840-900-XXXX RIALTO Rialto CA
840-911-XXXX CA
840-950-XXXX CA
840-958-XXXX CA
840-959-XXXX CA
840-976-XXXX CA
840-977-XXXX CLAREMONT Claremont CA
840-996-XXXX S BERNDINO San Bernardino CA
840-997-XXXX CLAREMONT Claremont CA
840-998-XXXX HIGHLAND Highland CA
840-999-XXXX UPLAND Upland CA
Recent Signals

Latest complaint activity tied to 840

Complaint pages are the strongest indexing opportunity for this site right now, especially for exact phone numbers and toll-free exchanges.

FTC report from Middletown, DELAWARE

July 29, 2026 at 8:41 PM

840-254-6711 was logged as a robocall. Violation date: July 29, 2026 at 4:47 PM.

FTC report from Orland Park, ILLINOIS

July 29, 2026 at 1:38 PM

840-261-0088 was logged as a unwanted call. Violation date: July 29, 2026 at 10:40 AM.

FTC report from Grand Rapids, MICHIGAN

July 29, 2026 at 11:07 AM

840-221-9116 was logged as a unwanted call. Violation date: July 21, 2026 at 9:40 AM.

FTC report from GEORGIA

July 29, 2026 at 5:27 AM

840-837-4681 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: July 25, 2026 at 2:48 PM.

FTC report from Crestline, CALIFORNIA

July 28, 2026 at 7:01 PM

840-271-7711 was logged as a live voice. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: July 28, 2026 at 7:00 AM.

FTC report from CALIFORNIA

July 28, 2026 at 2:44 PM

840-466-6530 was logged as a unwanted call. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: July 28, 2026 at 11:43 AM.

FTC report from Inglewood, CALIFORNIA

July 28, 2026 at 1:39 PM

840-300-0192 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: July 28, 2026 at 10:34 AM.

FTC report from Duarte, CALIFORNIA

July 28, 2026 at 1:10 PM

840-201-5175 was logged as a live voice. Violation date: July 28, 2026 at 1:59 PM.

FTC report from MARYLAND

July 28, 2026 at 10:53 AM

840-221-9251 was logged as a robocall. Violation date: July 28, 2026 at 10:37 PM.

FTC report from MARYLAND

July 28, 2026 at 10:49 AM

840-221-9251 was logged as a robocall. Violation date: July 28, 2026 at 10:37 AM.

FTC report from CALIFORNIA

July 27, 2026 at 7:03 PM

840-253-1612 was logged as a unwanted call. Violation date: July 27, 2026 at 4:00 PM.

FTC report from Pottstown, PENNSYLVANIA

July 27, 2026 at 6:32 PM

840-221-9659 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: July 27, 2026 at 2:58 PM.

FTC report from FLORIDA

July 27, 2026 at 10:59 AM

840-221-9662 was logged as a robocall. Violation date: July 27, 2026 at 10:57 AM.

FTC report from MASSACHUSETTS

July 27, 2026 at 7:24 AM

840-221-8706 was logged as a unwanted call. Category: No Subject Provided. Violation date: July 24, 2026 at 12:00 AM.

FTC report from Texarkana, ARKANSAS

July 26, 2026 at 3:56 PM

840-209-2884 was logged as a robocall. Violation date: July 26, 2026 at 2:49 PM.

FTC report from Silver Spring, MARYLAND

July 25, 2026 at 9:34 AM

840-210-0873 was logged as a robocall. Violation date: July 10, 2026 at 1:10 PM.

FTC report from OHIO

July 25, 2026 at 8:19 AM

840-221-9265 was logged as a robocall. Violation date: July 18, 2026 at 5:00 PM.

FTC report from Lansing, MICHIGAN

July 24, 2026 at 3:18 PM

840-221-8887 was logged as a robocall. Violation date: July 22, 2026 at 12:22 PM.

FTC report from OHIO

July 24, 2026 at 2:46 PM

840-221-9194 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: July 24, 2026 at 11:42 AM.

FTC report from FLORIDA

July 24, 2026 at 11:03 AM

840-752-9125 was logged as a live voice. Violation date: July 24, 2026 at 11:00 AM.

FTC report from Arlington Heights, ILLINOIS

July 24, 2026 at 10:23 AM

840-221-8820 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: July 24, 2026 at 9:17 AM.

FTC report from Huntsville, ALABAMA

July 23, 2026 at 4:22 PM

840-221-8961 was logged as a robocall. Category: Warranties & protection plans. Violation date: July 21, 2026 at 12:00 AM.

FTC report from Chino, CALIFORNIA

July 23, 2026 at 4:21 PM

840-201-5175 was logged as a live voice. Category: No Subject Provided. Violation date: July 23, 2026 at 1:19 PM.

FTC report from Parkersburg, IOWA

July 23, 2026 at 4:10 PM

840-877-9536 was logged as a robocall. Violation date: July 23, 2026 at 12:27 PM.

FTC report from Lancaster, PENNSYLVANIA

July 23, 2026 at 12:03 PM

840-221-9673 was logged as a robocall. Violation date: July 23, 2026 at 12:00 AM.

FTC report from NEW YORK

July 23, 2026 at 9:55 AM

840-466-6794 was logged as a robocall. Violation date: July 23, 2026 at 9:55 AM.

FTC report from Flora, FLORIDA

July 23, 2026 at 9:52 AM

840-219-1724 was logged as a robocall. Violation date: July 15, 2026 at 7:44 PM.

FTC report from Harlingen, TEXAS

July 23, 2026 at 12:05 AM

840-221-9231 was logged as a robocall. Violation date: July 22, 2026 at 11:46 PM.

FTC report from Fontana, CALIFORNIA

July 22, 2026 at 10:37 PM

840-466-0013 was logged as a live voice. Violation date: July 22, 2026 at 12:29 PM.

FTC report from Santa Ana, CALIFORNIA

July 22, 2026 at 10:18 PM

840-218-5935 was logged as a robocall. Category: Dropped call or no message. Violation date: July 6, 2026 at 6:11 PM.

FTC report from Saint George, UTAH

July 22, 2026 at 7:40 PM

840-837-4214 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: July 16, 2026 at 3:07 PM.

FTC report from ILLINOIS

July 22, 2026 at 7:15 PM

840-283-1831 was logged as a live voice. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: July 22, 2026 at 7:26 PM.

FTC report from Lansing, MICHIGAN

July 22, 2026 at 12:30 PM

840-221-8887 was logged as a robocall. Violation date: July 22, 2026 at 12:20 PM.

FTC report from Somerville, MASSACHUSETTS

July 22, 2026 at 10:17 AM

840-221-9478 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: July 18, 2026 at 12:00 AM.

FTC report from MASSACHUSETTS

July 22, 2026 at 8:56 AM

840-221-9225 was logged as a unwanted call. Category: No Subject Provided. Violation date: July 21, 2026 at 12:00 AM.

FTC report from Pleasant Hill, CALIFORNIA

July 20, 2026 at 7:54 PM

840-248-4568 was logged as a robocall. Violation date: July 20, 2026 at 1:03 PM.

FTC report from CALIFORNIA

July 20, 2026 at 4:09 PM

840-212-3830 was logged as a robocall. Category: No Subject Provided. Violation date: July 17, 2026 at 10:33 AM.

FTC report from VIRGINIA

July 20, 2026 at 2:08 PM

840-466-6059 was logged as a robocall. Category: No Subject Provided. Violation date: July 19, 2026 at 2:04 PM.

FTC report from Stratford, CONNECTICUT

July 20, 2026 at 10:43 AM

840-221-8896 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: July 20, 2026 at 12:00 AM.

FTC report from Land O Lakes, FLORIDA

July 20, 2026 at 10:30 AM

840-221-9289 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: July 20, 2026 at 10:25 AM.