Diamond Bar, California
Diamond Bar, California, in Los Angeles County, has ZIP code 91765 and area code 909, with 840 as an overlay.
- ZIP code
- 91765
- Area codes
- 909, 840
- County
- Los Angeles County
- State
- California
- Time zone
- Pacific Time
- Coordinates
- 34.0066, -117.8098
ZIP codes in Diamond Bar
Area codes for Diamond Bar
- Area code 909
In service since November 14, 1992. Shares its area with 840. Local calls are dialed with 1 plus ten digits.
- Area code 840
In service since February 23, 2021. Shares its area with 909. Local calls are dialed with 1 plus ten digits.
Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.
Time zone
Diamond Bar is in the Pacific Time zone.
Towns near Diamond Bar
- Walnut4.8 km (3.0 mi)
- Pomona7.9 km (4.9 mi)
- Chino Hills7.9 km (4.9 mi)
- Rowland Heights8.5 km (5.3 mi)
- South San Jose Hills8.7 km (5.4 mi)
- Brea10.2 km (6.3 mi)
- San Dimas10.7 km (6.6 mi)
- West Covina11.4 km (7.1 mi)
Local numbers in area code 909
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- (909) 334-5888Chino, CA$69View & buy
- (909) 334-6777Chino, CA$69View & buy
- (909) 479-2002Chino, CA$69View & buy
- (909) 500-8838Calimesa, CA$69View & buy
- (909) 637-2002Fontana, CA$69View & buy
- (909) 670-2772Claremont, CA$69View & buy
- (909) 681-1881Fontana, CA$69View & buy
- (909) 710-5775Etiwanda, CA$69View & buy
- (909) 736-2002Upland, CA$69View & buy
- (909) 765-4329Muscoy, CA$69View & buy
- (909) 780-8118Muscoy, CA$69View & buy
- (909) 780-8448Muscoy, CA$69View & buy
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