---
title: "Area code 909: California, United States"
url: "https://lookvalid.com/area-code/909.md"
canonical_url: "https://lookvalid.com/area-code/909"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 909 serves California, United States. Number formats, numbering rules, a live phone validator and the other codes in California."
---

# Area code 909: California, United States

Area code 909 serves California, United States. Number formats, numbering rules, a live phone validator and the other codes in California.

NANPA lists 786 central office codes (prefixes) in use in area code 909, held by 37 holders across 25 rate centers.
Frontier California holds the most prefixes, 156 (20%). 71% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 3,401 complaints on file for 2,605 numbers in 909, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- In service since: 1992-11-14
- Time zone: Pacific (P)
- Assigned overlays: 840 (2021-02-23)
- Prefixes in use: 786
- Pooled prefixes: 560 (71%)
- Rate centers: 25
- Companies holding prefixes: 37
- Assignment dates on file: 2001-01-17 to 2025-10-09 (369 prefixes)
- ZIP codes in its places: 56

## Rate centers

| Rate center | Prefixes | Share |
| --- | --- | --- |
| ONTARIO | 124 | 16% |
| S BERNDINO | 88 | 11% |
| FONTANA | 70 | 9% |
| UPLAND | 70 | 9% |
| CHINO | 55 | 7% |
| POMONA | 51 | 6% |
| CLAREMONT | 50 | 6% |
| COLTON | 45 | 6% |
| 17 other rate centers | 233 | 30% |

## Carriers

| Holder | Prefixes | Share |
| --- | --- | --- |
| Frontier California | 156 | 20% |
| T-Mobile USA | 87 | 11% |
| New Cingular Wireless PCS | 75 | 10% |
| Verizon Wireless | 72 | 9% |
| Metropcs Networks | 52 | 7% |
| Bandwidth.com CLEC | 47 | 6% |
| 31 other carriers | 297 | 38% |

A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company.

## History

- 1951-01-01: Area code 714, named as the parent of 909 in the NANPA report, was in service.
- 1992-11-14: Area code 909 went into service.
- 2004-07-17: Area code 951 went into service and names 909 as its parent.
- 2021-02-23: Area code 840 went into service as an overlay in the same area as 909.

## Nearest area codes

The area codes closest to 909, measured between the centers of the ZIP code places they serve, are 951 (about 22 miles), 626 (about 26 miles), 657 (about 26 miles), 714 (about 26 miles) and 949 (about 31 miles).

## ZIP codes

56 ZIP codes fall in places that have a rate center in this area code. The places with the most are Riverside, CA (17 ZIP codes), Corona, CA (7 ZIP codes) and Fontana, CA (5 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes.

## Complaints on file

3,401 complaints for 2,605 numbers. Numbers whose latest complaint falls in each year:

- 2023: 138
- 2024: 148
- 2025: 142

## Questions

### Where is area code 909?

NANPA assigns area code 909 to California, United States.

### In which state does area code 909 sit?

California. 909 is one of 41 area codes the NANPA table assigns to the state.

### Which places does area code 909 cover?

The places with the most ZIP codes among the rate centers in 909 are Riverside, CA, Corona, CA and Fontana, CA. The rate center list on this page shows all of them.

### Who owns area code 909?

NANPA assigns area codes. Within 909, Frontier California holds the most prefixes, 156 prefixes or 20%.

### Which time zone does 909 use?

The NANPA NPA report lists the time zone for 909 as Pacific (P).

### What year did 909 enter service?

The NANPA NPA report gives an in-service date of 1992-11-14, so 909 has been in use since 1992.

### Does area code 909 have an overlay?

Yes. 840 (in service 2021-02-23) shares the same area with 909, so numbers from all of them are local to each other.

### Which area codes are nearest to 909?

The area codes closest to 909, measured between the centers of the ZIP code places they serve, are 951 (about 22 miles), 626 (about 26 miles), 657 (about 26 miles), 714 (about 26 miles) and 949 (about 31 miles).

### How many prefixes does area code 909 have?

NANPA's report dated 2026-10-17 lists 786 prefixes in service in 909, spread over 25 rate centers and 37 holders.

### Are there complaints about 909 numbers?

The FCC data on file has 3,401 complaints for 2,605 numbers in 909. They are unverified consumer reports. A number with no complaints on file is not proven safe.

Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).