Area code 630
Area code 630 serves Aurora and nearby parts of Illinois, including Naperville, Wheaton and Downers Grove. It is on Central Time, which observes daylight saving time. 331 is an overlay for the same area.
Area code 630 at a glance
| State | Illinois (IL) |
| Main city | Aurora |
| Time zone | Central Time |
| UTC offset | UTC−6 in winter, UTC−5 in summer |
| Daylight saving time | Yes |
| Overlay codes | 331 |
Cities in 630
- Aurora
- Naperville
- Wheaton
- Downers Grove
An area code shows where a number was first assigned. Mobile numbers keep their area code when people move, so the person you’re calling may be somewhere else.
When you can call a 630 number
Federal telemarketing rules under the TCPA allow sales calls between 8 AM and 9 PM in the called person’s local time. Here is that window for a 630 number, shown in your own time zone.
General information, not legal advice. Some states add rules for Sundays, holidays or the number of calls. See our calling hours guide.
| If you’re on | You can call 630 between |
|---|---|
| Eastern | 9:00 AM to 10:00 PM |
| Central | 8:00 AM to 9:00 PM |
| Mountain | 7:00 AM to 8:00 PM |
| Arizona | 6:00 AM to 7:00 PM |
| Pacific | 6:00 AM to 7:00 PM |
See the time in 630 without leaving your CRM
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Other area codes in Illinois
Questions about 630
What time zone is area code 630?
Area code 630 is on Central Time. It observes daylight saving time.
Where is area code 630?
Area code 630 is in Illinois. Its main city is Aurora, and it also covers Naperville, Wheaton and Downers Grove.
What are the legal hours to call a 630 number?
Under the federal TCPA, sales calls are allowed from 8 AM to 9 PM in the called person’s local time. Personal and informational calls are not limited by these hours.
What area codes overlay 630?
331 covers the same area as 630, so numbers in the same town can have either code.