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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 94

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

Reports, 180 Days 554

Broader complaint volume used to prioritize indexable pages.

Active Prefixes 133

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

Carriers / Assignees 22

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

Search a phone number, area code, exchange, or short code

Paste raw digits, a formatted phone number, an area code, an NPA-NXX block, or a short code. US and Canada phone lookups route automatically, and international iMessage checks are available separately.

Phone LookupTop ComplaintsArea CodesNPA-NXXiMessage
Examples: 206-739-5800, 206, 206-739, 48369
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. · 302 routing rows
  • NEW CINGULAR WIRELESS PCS, LLC · 250 routing rows
  • ONVOY, LLC - CA · 246 routing rows
  • CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA · 208 routing rows
  • FRACTEL, LLC · 65 routing rows
  • COMMIO, LLC · 65 routing rows
  • BANDWIDTH.COM CLEC, LLC - CA · 46 routing rows
  • ONVOY SPECTRUM, LLC · 45 routing rows
  • TELNYX LLC · 19 routing rows
  • PEERLESS NETWORK OF CALIFORNIA, LLC - CA · 13 routing rows
  • BOOST SUBSCRIBERCO L.L.C. · 10 routing rows
  • MULTIPLE OCN LISTING · 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
840-998-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 HAWAII

April 27, 2026 at 10:01 PM

840-466-6201 was logged as a live voice. Violation date: April 26, 2026 at 1:18 PM.

FTC report from Incline Village, NEVADA

April 27, 2026 at 3:45 PM

840-221-9886 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 27, 2026 at 12:31 PM.

FTC report from Little Rock, ARKANSAS

April 27, 2026 at 2:54 PM

840-221-8987 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 25, 2026 at 12:46 PM.

FTC report from FLORIDA

April 27, 2026 at 2:52 PM

840-837-4157 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 27, 2026 at 2:25 PM.

FTC report from Plentywood, MONTANA

April 23, 2026 at 8:31 PM

840-837-4601 was logged as a robocall. Violation date: April 23, 2026 at 6:27 PM.

FTC report from MICHIGAN

April 23, 2026 at 6:51 PM

840-219-1624 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: April 23, 2026 at 9:49 AM.

FTC report from OHIO

April 23, 2026 at 5:24 PM

840-221-8795 was logged as a robocall. Violation date: April 23, 2026 at 4:51 PM.

FTC report from Lagrange, ILLINOIS

April 23, 2026 at 5:16 PM

840-466-6171 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 21, 2026 at 11:50 AM.

FTC report from CALIFORNIA

April 22, 2026 at 7:59 PM

840-221-8994 was logged as a unwanted call. Category: No Subject Provided. Violation date: April 22, 2026 at 12:00 AM.

FTC report from Brunswick, MARYLAND

April 22, 2026 at 3:10 PM

840-221-8879 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: April 22, 2026 at 1:58 PM.

FTC report from Atlanta, GEORGIA

April 22, 2026 at 2:16 PM

840-221-9878 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 22, 2026 at 11:09 AM.

FTC report from Streator, ILLINOIS

April 22, 2026 at 9:57 AM

840-466-6978 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: April 21, 2026 at 2:41 PM.

FTC report from Atlanta, GEORGIA

April 21, 2026 at 6:52 PM

840-221-9770 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: December 10, 2025 at 2:00 PM.

FTC report from Clover, NORTH CAROLINA

April 21, 2026 at 1:34 PM

840-221-9521 was logged as a unwanted call. Category: Calls pretending to be government, businesses, or family and friends. Violation date: April 16, 2026 at 1:22 PM.

FTC report from TENNESSEE

April 21, 2026 at 10:25 AM

840-265-2703 was logged as a unwanted call. Category: No Subject Provided. Violation date: April 15, 2026 at 7:23 PM.

FTC report from Nampa, IDAHO

April 20, 2026 at 9:15 PM

840-466-6306 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 20, 2026 at 5:31 PM.

FTC report from Cleveland, TENNESSEE

April 20, 2026 at 3:33 PM

840-466-8325 was logged as a robocall. Violation date: April 20, 2026 at 3:30 PM.

FTC report from Malvern, PENNSYLVANIA

April 19, 2026 at 4:02 PM

840-210-0721 was logged as a robocall. Violation date: April 17, 2026 at 12:00 AM.

FTC report from COLORADO

April 19, 2026 at 3:41 PM

840-221-9350 was logged as a robocall. Violation date: April 17, 2026 at 2:32 PM.

FTC report from CALIFORNIA

April 17, 2026 at 2:03 PM

840-212-5226 was logged as a unwanted call. Category: No Subject Provided. Violation date: April 16, 2026 at 12:35 PM.

FTC report from CALIFORNIA

April 17, 2026 at 2:02 PM

840-212-5908 was logged as a unwanted call. Category: No Subject Provided. Violation date: April 16, 2026 at 4:43 PM.

FTC report from Somerset, KENTUCKY

April 17, 2026 at 1:31 PM

840-837-4331 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 15, 2026 at 3:21 PM.

FTC report from Johnstown, PENNSYLVANIA

April 17, 2026 at 11:33 AM

840-210-0815 was logged as a live voice. Category: Dropped call or no message. Violation date: April 17, 2026 at 10:41 AM.

FTC report from Johnstown, PENNSYLVANIA

April 17, 2026 at 10:55 AM

840-210-0815 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 17, 2026 at 10:42 AM.

FTC report from Berkeley, CALIFORNIA

April 16, 2026 at 5:45 PM

840-465-8471 was logged as a robocall. Violation date: April 16, 2026 at 12:00 PM.

FTC report from Wauchula, FLORIDA

April 16, 2026 at 2:58 PM

840-466-6139 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 16, 2026 at 11:36 AM.

FTC report from NORTH CAROLINA

April 16, 2026 at 1:13 PM

840-221-9087 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 16, 2026 at 9:51 AM.

FTC report from Tulsa, OKLAHOMA

April 15, 2026 at 3:58 PM

840-265-2573 was logged as a unwanted call. Violation date: April 14, 2026 at 2:41 PM.

FTC report from INDIANA

April 15, 2026 at 2:41 PM

840-860-1892 was logged as a live voice. Violation date: January 8, 2026 at 12:00 PM.

FTC report from FLORIDA

April 15, 2026 at 1:19 PM

840-265-2230 was logged as a live voice. Category: Dropped call or no message. Violation date: April 15, 2026 at 1:17 PM.

FTC report from Maynard, MASSACHUSETTS

April 14, 2026 at 9:01 PM

840-236-9808 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 9, 2026 at 9:26 AM.

FTC report from OKLAHOMA

April 14, 2026 at 6:18 PM

840-210-4254 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 10, 2026 at 11:10 AM.

FTC report from Towson, MARYLAND

April 14, 2026 at 3:38 PM

840-263-7722 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 9, 2026 at 2:29 PM.

FTC report from North Ridgeville, OHIO

April 14, 2026 at 12:56 PM

840-219-1972 was logged as a live voice. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 14, 2026 at 4:29 AM.

FTC report from FLORIDA

April 14, 2026 at 9:42 AM

840-837-4474 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 14, 2026 at 12:00 PM.

FTC report from VIRGINIA

April 13, 2026 at 5:49 PM

840-837-4695 was logged as a robocall. Violation date: April 10, 2026 at 11:13 AM.

FTC report from Cordele, GEORGIA

April 13, 2026 at 1:02 PM

840-219-1850 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 12, 2026 at 1:07 PM.

FTC report from Springfield, ILLINOIS

April 13, 2026 at 10:23 AM

840-263-7406 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: March 30, 2026 at 6:35 PM.

FTC report from Pikeville, TENNESSEE

April 12, 2026 at 10:55 PM

840-236-9808 was logged as a robocall. Violation date: April 9, 2026 at 8:27 AM.

FTC report from Rapid City, SOUTH DAKOTA

April 10, 2026 at 7:01 PM

840-221-8725 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: April 9, 2026 at 1:12 PM.