520 area code
Area code 520 is in Arizona, including Tucson, Sierra Vista, Casa Grande and Nogales. It's on Mountain Time (no daylight saving).
Mountain Time (no daylight saving)
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Business hours are taken as 9 AM to 5 PM on weekdays. US telemarketing rules only allow sales calls between 8 AM and 9 PM local time.
Cities in area code 520
| City | Time zone |
|---|---|
| Tucson, AZ | Mountain Time (no daylight saving) |
| Sierra Vista, AZ | Mountain Time (no daylight saving) |
| Casa Grande, AZ | Mountain Time (no daylight saving) |
| Nogales, AZ | Mountain Time (no daylight saving) |
| Douglas, AZ | Mountain Time (no daylight saving) |
| Green Valley, AZ | Mountain Time (no daylight saving) |
| Sells, AZ | Mountain Time (no daylight saving) |
| Willcox, AZ | Mountain Time (no daylight saving) |
| Ajo, AZ | Mountain Time (no daylight saving) |
| Bisbee, AZ | Mountain Time (no daylight saving) |
| Sonoita, AZ | Mountain Time (no daylight saving) |
| Huachuca City, AZ | Mountain Time (no daylight saving) |
Other area codes in Arizona
More: look up another area code · time zone converter · US time zones map
Questions people ask
Where is area code 520?
Area code 520 is in Arizona, including Tucson, Sierra Vista, Casa Grande and Nogales.
What time zone is area code 520?
520 is on Mountain Time (no daylight saving) (UTC−7).
What time is it in area code 520 right now?
The live clock at the top of this page shows the current local time in area code 520.