The 928 area code serves northern and western Arizona, from the high country around Flagstaff and the red rocks of Sedona to the agricultural city of Yuma and the Colorado River towns. Created in 2001 when it split from 520, 928 covers the largest and most scenic geographic region in the state.
Quick Summary of the 928 Area Code
| Area Code | 928 |
| State | Arizona (AZ) |
| Region | Northern & Western Arizona (Flagstaff, Yuma & the Colorado River) |
| Major Cities | Flagstaff, Yuma, Prescott, Lake Havasu City, Kingman, Bullhead City, Sedona, Page |
| Time Zone | Mountain Standard Time (MST) – no daylight saving |
| Dialing Format | 7 or 10-digit dialing |
Geographic Coverage
The 928 area code covers northern and western Arizona, including Flagstaff and Sedona in the high country, Prescott in the central mountains, Page and the Navajo and Hopi lands near the Grand Canyon and Utah border, the Colorado River cities of Kingman, Lake Havasu City, and Bullhead City in the west, and Yuma in the far southwestern corner near the California and Mexico borders.
Time Zone
The 928 area code observes Mountain Standard Time (MST, UTC−7), but Arizona is unusual: it does not observe daylight saving time and keeps the same clock all year. This produces an interesting effect – in winter the region is on Mountain Time, one hour ahead of the West Coast, but in summer, when other states spring forward and Arizona does not, the 928 area effectively matches Pacific Daylight Time and shares the same clock as California. One important exception applies within the 928 region: the Navajo Nation in northeastern Arizona does observe daylight saving time, so during the summer its clocks run one hour ahead of the surrounding Arizona communities.
Tip: Business hours across the 928 region generally run 9:00 AM to 5:00 PM local time, Monday through Friday.
How to Dial a 928 Number
Area code 928 is not part of an overlay, so it has traditionally allowed 7-digit local dialing. However, 10-digit dialing is now the recommended nationwide standard, and dialing the full 10-digit number (928 + the line number) always works reliably. For international callers, dial your country’s exit code, then +1 (the North American country code), then 928, followed by the seven-digit local number.
Scam Alerts for the 928 Area Code
Like every U.S. area code, 928 has been used by scammers who spoof local numbers to appear trustworthy. Residents in Flagstaff, Yuma, Prescott, Lake Havasu City, Kingman, Bullhead City, Sedona, Page should stay alert to the following common tactics:
| Scam Type | What to Watch For |
|---|---|
| IRS / Tax Scams | Threatening calls demanding immediate tax payment via gift cards or wire transfer. |
| Utility Shut-off | Fake APS callers demanding instant payment to keep your power on. |
| Vacation Rental Scam | Fraudulent Sedona or Lake Havasu rental listings that vanish after you pay a deposit. |
| Medicare / Health Scam | Robocalls seeking Medicare numbers under the guise of free braces or test kits. |
If you receive a suspicious call from a 928 number, take these steps to protect yourself:
- Do not share personal information such as Social Security numbers, bank details, or passwords over the phone.
- Hang up and verify by calling the organization back using an official number from its website.
- Report the call to the FTC at reportfraud.ftc.gov and to the Arizona Attorney General’s Office.
- Block the number and consider registering with the National Do Not Call Registry.
Red Flag: Legitimate agencies such as the IRS, Social Security Administration, or your local utility company (APS, SRP, or Tucson Electric Power) will never demand immediate payment by gift card, wire transfer, or cryptocurrency. Any 928 caller making such a demand is a scammer.
History and Economy of the 928 Region
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Area code 928 was created in 2001, split from 520, to serve the vast northern and western reaches of Arizona. The regional economy is remarkably varied. Flagstaff is a mountain college town, home to Northern Arizona University, the Lowell Observatory, and a booming tourism industry as a gateway to the Grand Canyon. Yuma is one of the nation’s leading agricultural regions – often called the “Winter Lettuce Capital of the World” – and hosts major military installations. Sedona thrives on tourism and the arts, while Lake Havasu City, Bullhead City, and Kingman anchor a Colorado River recreation economy, and the Navajo and Hopi lands add cultural tourism and traditional industries.
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Looking Up a 928 Number
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To identify a 928 caller, use a reverse phone lookup or search the full 10-digit number online. Businesses, resorts, and government offices across northern and western Arizona publish their 928 numbers, so a legitimate caller is often easy to confirm with a quick search. For unknown numbers, let the call go to voicemail – genuine callers usually leave a message, while robocallers and scammers rarely do.
Nearby & Related Area Codes
Arizona is served by several area codes. If you are researching 928, these neighboring codes are worth knowing:
- 520 – Southern AZ / Tucson
- 602 – Central Phoenix
- 480 – East Valley / Scottsdale & Mesa
- 623 – West Valley / Glendale
You can also browse our full directory of Arizona area codes for more regional guides.
↑ See the complete list of All US Area Codes by State – every area code across all 50 states in one directory.
Explore Neighboring States
Researching area codes just across the state line? Start with these codes in the states that border Arizona:
- California – area code 213
- Nevada – area code 702
- Utah – area code 801
- Colorado – area code 303
- New Mexico – area code 505
Frequently Asked Questions
Where is the 928 area code located?
The 928 area code covers northern and western Arizona, including Flagstaff, Yuma, Prescott, Lake Havasu City, Kingman, Bullhead City, Sedona, and Page.
Does 928 have an overlay?
No. The 928 area code covers its large northern and western Arizona region on its own and currently has no overlay code.
Do I need to dial 10 digits for 928?
Because 928 has no overlay, 7-digit local dialing has historically worked, but dialing the full 10 digits is now the recommended standard and always works.
Does the 928 area code observe daylight saving time?
Most of the 928 region does not – it stays on Mountain Standard Time year-round. However, the Navajo Nation in northeastern Arizona does observe daylight saving time, so its clocks change in summer.
Related 928 Guides
- Is a 928 call safe? Read Is area code 928 a scam? Spam & safety guide.
- Worried about spam or robocalls? Browse our Scam Alerts directory.