The sports and entertainment hub of the West Valley, Glendale is home to State Farm Stadium and a charming historic downtown known for its antique shops. It sits within Greater Phoenix’s West Valley 623 code. This guide breaks down Glendale’s area codes, the required 10-digit dialing, the no-daylight-saving time quirk, major ZIP codes, and local scam warnings. (Note: this covers Glendale, Arizona, not Glendale, California.)
Glendale Area Codes at a Glance
| Detail | Information |
|---|---|
| Primary Area Code(s) | 623 |
| Overlay / Adjacent Code(s) | 602 (metro) |
| Time Zone | Mountain Standard Time (MST) – no daylight saving time |
| Major County | Maricopa County |
| Dialing Format | 10-digit dialing required |
Area Code Breakdown & Valley Mapping
623 – West Valley Code
Area code 623 is the West Valley code, covering Glendale, Peoria, Surprise, and Avondale. Split from 602 in 1999, it is Glendale’s primary code across the northwestern Phoenix metro.
602 – Central Phoenix Code
Area code 602 is the central Phoenix code, and because calls across the Valley are local, 602 numbers appear throughout Greater Phoenix alongside Glendale’s West Valley 623.
Neighborhoods & Local Coverage
Glendale’s 623 code covers a West Valley city with two very different centers. Historic Downtown Glendale, around Catlin Court, is famous as Arizona’s antique capital, with restored bungalows housing shops and tearooms. A few miles west, the Sports & Entertainment District bursts with activity around State Farm Stadium and Desert Diamond Arena.
Beyond those hubs, the same codes reach the master-planned Arrowhead Ranch community in the north, the Westgate Entertainment District’s restaurants and shops, and the neighborhoods around Glendale Community College. As part of the West Valley, Glendale shares the 623 code with Peoria and Surprise next door.
Local Dialing Rules, Time Zone & International Format
Because Greater Phoenix is served by three interleaving area codes, Glendale and the West Valley require 10-digit dialing for local calls — always dial the area code plus the 7-digit number. The West Valley uses 623, while central Phoenix uses 602 and the East Valley uses 480.
A note on Arizona time: Arizona does not observe daylight saving time, so it stays on Mountain Standard Time (MST) all year. In the summer, that means Glendale shares the same clock as Pacific Time cities like Los Angeles, while in winter it matches Denver on Mountain Time. Keep this in mind when scheduling calls across state lines.
To call Glendale from outside the United States, dial your country’s exit code, then the U.S. country code +1, followed by the 10-digit number (for example, +1 623 XXX-XXXX). From inside the U.S. and Canada, simply dial 1 before the 10-digit number for long-distance calls.
Major ZIP Codes Covered
The 623 service area spans many of Glendale’s core ZIP codes, including 85301, 85302, 85303, 85304, 85305, 85306, and 85308.
Spam & Scam Call Warnings in Glendale
Glendale residents report neighbor-spoofing robocalls faking a local 623 prefix, plus fake utility-shutoff threats from callers posing as APS. Event-ticket scams around State Farm Stadium and auto-warranty robocalls are also common.
| Scam Type | What to Watch For |
|---|---|
| Neighbor Spoofing | Calls that mimic a local 623 prefix to look familiar. |
| Utility / Toll Scams | Threats to shut off power or demand toll payment via gift cards. |
| IRS / Government | Robocalls claiming legal action — agencies never call to demand instant payment. |
Red flag: Any caller who pressures you to pay immediately with gift cards, wire transfers, or cryptocurrency is almost certainly running a scam. Hang up and verify through an official number.
↑ See the complete list of All US Area Codes by State for every code across the country.
Nearby & Related Arizona Cities
Frequently Asked Questions
What area code is Glendale, AZ?
Glendale, Arizona uses the West Valley code 623, with central Phoenix’s 602 also appearing across the metro.
Is Glendale, AZ the same as Glendale, CA?
No. Glendale, Arizona (area code 623) is a West Valley suburb of Phoenix. Glendale, California, near Los Angeles, uses area code 818/747. They are different cities in different states.
Do I need to dial 10 digits in Glendale, AZ?
Yes. Because Greater Phoenix spans three area codes, all local calls require 10-digit dialing.
Does Glendale observe daylight saving time?
No. Glendale and most of Arizona stay on Mountain Standard Time year-round.
Stay Safe & Explore More
- Verify an unknown caller in our Scam Alerts directory.
- Comparing nationwide numbers? See our Toll-Free Numbers guides.