630 Area CodeAurora, IL
Area code 630 covers Aurora and nearby communities in Illinois, in the Central Time (CT) zone, home to about 1.7 million people across 61 cities. It overlays 331, so the same region uses both and every local call needs all ten digits.
Overview
- Major City
- Aurora
- State
- Illinois (IL)
- Timezone
- Central Time (CT)
- Current Time
- Overlay
- Yes – shares area with 331
Where is area code 630?
Area code 630 serves part of Aurora, IL and the surrounding areas. It has a single overlay (331) that serves the same area.
Overview of the 630 Area Code
What is the 630 area code?
The 630 area code serves Aurora, Illinois, alongside other established area codes. When you see a 630 number, it indicates a local number within this geographic area.
Why was area code 630 created?
The 630 area code was introduced as an overlay to add numbers in Aurora once the existing area code 331 began to run out of available prefixes. It added a new supply of numbers without requiring current residents to change their existing digits.
Geographic Coverage of the 630 Area Code
The 630 area code serves Aurora and surrounding areas in Illinois. It operates within the Central Time (CT) time zone. It complements the coverage of area code 331. This area code covers several key cities, including:
- Aurora
- Naperville
- Joliet
- Bolingbrook
- Wheaton
- Downers Grove
Got a call from a 630 number? It came from Aurora, IL. Since 630 overlays with 331, every local call in the region needs all ten digits to land on the right line. Inside 630, Aurora holds about 11% of the population; the rest is split across 60 smaller cities.
Aurora Area Codes Overview
Aurora is served by multiple area codes, reflecting its telecommunications needs. The 630 area code operates alongside 331. Here are the area codes serving this region:
The introduction of the 630 area code helped prevent number exhaustion, ensuring a continuous supply of phone numbers across the geographic area.
What cities does area code 630 cover?
| City | State | Population | % of Area Code | % of City |
|---|---|---|---|---|
| Aurora | IL | 180,710 | 5% | 100% |
| Naperville | IL | 153,124 | 4% | 100% |
| Joliet | IL | 151,837 | 0% | 6% |
| Bolingbrook | IL | 74,756 | 2% | 91% |
| Wheaton | IL | 53,741 | 1% | 100% |
| Downers Grove | IL | 50,552 | 2% | 100% |
| Plainfield | IL | 48,881 | 1% | 20% |
| Elmhurst | IL | 46,108 | 1% | 100% |
| Lombard | IL | 44,490 | 1% | 100% |
| Romeoville | IL | 41,177 | 0% | 9% |
* Sources: Population – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). Area code assignments – NANPA CO Code data. See our data methodology.
Has area code 630 been reported for unwanted calls?
Yes – 972 unwanted-call complaints were reported to the FTC for numbers showing a 630 area code (May 29 – Jul 2, 2026).
- 61% robocalls
- ↑ 52% vs prior period
Most-reported subjects
- Other52%509
- Dropped call or no message11%105
- Reducing your debt (credit cards, mortgage, student loans)9%91
* Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints. Source: FTC Do Not Call (DNC) Reported Calls Data, retrieved 2026-07-05.
Which prefixes and exchanges belong to area code 630?
78% assigned to a telco
- 66% Landline
- 34% Wireless
- 0% Unknown
| Prefix | Usage | Carrier |
|---|---|---|
| (630)200- | Wireless | Verizon Wireless |
| (630)201- | Wireless | Sprint Spectrum |
| (630)202- | Wireless | Sprint Spectrum |
| (630)203- | Landline | Mcimetro Access Transmission Services |
| (630)204- | Wireless | Verizon Wireless |
| (630)205- | Wireless | Sprint Spectrum |
| (630)206- | Landline | Level 3 Communications |
| (630)207- | Wireless | New Cingular Wireless Pcs |
| (630)208- | Landline | Illinois Bell Tel Co |
| (630)209- | Wireless | New Cingular Wireless Pcs |
Frequently Asked Questions about the 630 Area Code
Who called me from a 630 number?
A 630 number is assigned to Aurora, Illinois, so a call may come from there. But caller ID is easy to fake, and scammers often spoof a local 630 code to look nearby, so a 630 number doesn't prove the caller is local. Recently, 972 unwanted-call complaints were reported to the FTC for numbers showing the 630 code (61% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.
Is 630 a scam area code?
No area code is a scam on its own. 630 is a normal, officially assigned code for Aurora, Illinois. Spam callers spoof local codes to raise the odds you answer, so 630 on your caller ID says nothing about who is really calling. Recently, 972 unwanted-call complaints were reported to the FTC for numbers showing the 630 code (61% flagged as robocalls). Judge the call itself, not the area code.
Why do I keep getting calls from the 630 area code?
Repeated calls from different 630 numbers are usually spoofing: a robocaller rotates through 630 numbers so each call looks local and slips past simple blocks. Recently, 972 unwanted-call complaints were reported to the FTC for numbers showing the 630 code (61% flagged as robocalls). Blocking one number rarely helps; voicemail screening, your carrier spam filter, and the Do Not Call Registry work better.
Should I answer an unknown 630 number?
If you aren't expecting a 630 call, let it ring to voicemail. Legitimate callers leave a message, most robocallers hang up when no one picks up, and answering can mark your number as active and bring more calls.
How do I block calls from the 630 area code?
Block a single 630 number from your recent-calls list (iPhone: tap the number, then Block this Caller; Android: tap the number, then Block or report spam). To cut the volume, turn on Silence Unknown Callers on iPhone or spam protection on Android, enable spam filtering from your carrier, and register at DoNotCall.gov. Blocking the entire 630 code also stops legitimate local calls, so use it only as a last resort.
Where is area code 630?
Area code 630 covers Aurora and the surrounding area in Illinois, spanning 61 cities with about 1,704,087 residents. It shares its area with overlay code 331.
Is 630 a real area code?
Yes. 630 is an active code in the North American Numbering Plan, assigned by NANPA and in service for Aurora, Illinois. A real code can still show up on spoofed spam calls, so treat unknown 630 calls with normal caution.
What timezone is the 630 area code in?
The 630 area code is in the Central Time (CT). Because a number can be kept when someone moves or switches to VoIP, a specific 630 caller may not be in that zone.
How do I call a 630 number from abroad?
From outside the US, dial your country's exit code, then 1 (the US country code), then 630 and the seven-digit number. From a mobile phone you can usually just enter +1 630 followed by the number and let the phone add the exit code for you.