Find any Area Code in Any State

Home » Ontario (CA)

Ontario (CA)

This city has 1 area codes

Ontario, California, located in San Bernardino County, is a city with a rich historical background and a prominent role in the telecommunications sector. Established as a citrus-growing region in the late 19th century, Ontario has transformed significantly since its founding in 1882. The city was originally developed by the Chaffey brothers, who named it after Ontario, Canada, reflecting their vision for a prosperous agricultural community.

The city's geographic position, approximately 35 miles east of Los Angeles, facilitates its status as a transportation hub. The Ontario International Airport serves both passenger and cargo flights, enhancing its connectivity to major markets. Ontario’s strategic location near major highways and interstates, such as the I-10 and I-15, also supports a diverse economic landscape that includes warehousing, distribution, and manufacturing.

In recent years, Ontario has emerged as a critical player in the telecommunications industry. The city's infrastructure possesses advanced fiber-optic networks, enabling high-speed internet access and promoting digital innovation. Additionally, its proximity to major tech centers in Southern California has attracted companies engaged in telecommunications, enhancing Ontario's reputation as a growing site for technological development.

As a city undergoing continuous development, Ontario reflects a blend of its historic agricultural roots and modern technological advancements, making it a unique part of California's landscape.

Ontario (CA) Listing Area Codes:

Chino Hills (CA)

Claremont (CA)

Chino (CA)

Colton (CA)

Diamond Bar (CA)

Fontana (CA)

Highland (CA)

La Verne (CA)

Montclair (CA)

Ontario (CA)

Pomona (CA)

Rancho Cucamonga (CA)

Redlands (CA)

Rialto (CA)

San Bernardino (CA)

San Dimas (CA)

Upland (CA)

Yucaipa (CA)

Ontario (CA) Area Codes:
909
  • What is the Ontario (CA)'s Area Code?

    Ontario (CA) has 1 area codes (909). These area codes are split between cities or states, so if you want to call to Ontario (CA), you need to know exactly where you would like to call.

  • How to call Ontario (CA) from another state in the U.S?

    Calling Ontario (CA) from another state in the United States is considered a long-distance call. Here’s how to make the call: First, dial the area code for Ontario (CA). Each state, and sometimes specific cities within a state, has unique area codes. Then, enter the 7-digit phone number of the person or business you’re trying to reach. If you’re calling from a landline, check with your provider, as long-distance charges may apply. However, most mobile carriers in the U.S. offer nationwide calling without additional fees. Alternatively, you can use VoIP or internet-based calling apps, like Skype, Zoom, or WhatsApp, to bypass traditional long-distance charges. The number you want to reach should look like this: 1-(AreaCode)-111-2222.

Other related cities: