840 area code
Pomona area, Pacific Time.Area code 840 covers Pomona, Arrowhead, San Bernardino and 18 more places in California, on Pacific Time. 909 covers the same area.
Right now in Pomona
Pacific Time (PST, UTC-8; PDT, UTC-7 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
Small talk
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Where 840 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 840 has 21. Each one's share is how many 840 numbers start there. Its biggest metro area is Riverside-San Bernardino-Ontario, CA.
- Pomona13%
- Arrowhead11%
- San Bernardino10%
- Fontana10%
- Chino6%
- Claremont6%
- Ontario6%
- Upland6%
- Colton5%
- Redlands4%
- Rialto4%
- Highland4%
Also: Marshall, Diamond Bar, Calimesa, Etiwanda, Mentone, Big Bear City, Crestline, Big Bear Lake, Running Springs
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call an 840 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 840 number to them, since you can't tell a work line from a personal cell.
What applies to 840Every day, 8 AM to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
840 and 909
840 went into service on February 23, 2021. 840 and 909 cover the same area, so new numbers can get either code and neighbors can have different area codes. 840 holds 14% of the area's exchanges; 909 holds the most. Local calls take all 10 digits.
- 1992909 overlay
- 2021840 starts
Source: NANPA area code database
Other California area codes
All California area codes- Stockton209350
- Los Angeles213323738
- Sacramento279916
- Compton310424
- Oakland341510
- Fresno357559
- Santa Rosa369707
- San Jose408669
- San Francisco415628
- Oceanside442760
- Chico530837
- Long Beach562
- San Diego619858
- Alhambra626
- Palo Alto650
- Anaheim657714
- Bakersfield661
- Van Nuys747818
- Santa Barbara805820
- Salinas831
- Walnut Creek925
- Irvine949
- Riverside951
Calling a list of 840 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
840 area code FAQ
What area code is 840?
840 is a California area code for Pomona, Arrowhead, San Bernardino, Fontana and 17 more places.
What time zone is the 840 area code in?
Pacific Time (PST, UTC-8; PDT, UTC-7 in summer).
Is 909 the same as 840?
Same area, different code. 840 and 909 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 840 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 840 area code start?
On February 23, 2021.
Calling 840 numbers? Reach more of them.
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