Glendale, Arizona · MST (UTC-7) · United States
Glendale, Peoria, Surprise, Sun City — West Valley Phoenix
West Valley of Phoenix. State Farm Stadium (NFL Cardinals). No DST.
Dial 1 + 623 + 7-digit number for calls from outside the area. Local calls within the same area code may use 7-digit dialing where available.
From outside United States: dial your country's exit code + 1 + 623 + number. From most countries, the format is +1-623-XXX-XXXX.
Area code 623 is in MST (UTC-7). Business hours are typically 9:00 AM – 5:00 PM local time.
While (623) is a legitimate area code, scammers can spoof any number. Never share personal info with unknown callers. Verify by calling the organization directly.
Area code data sourced from NANPA. Timezone data from IANA Time Zone Database. Last updated March 2026.