Area code
Area code 630 — DuPage County, IL
Illinois · in service since August 3, 1996
Area code 630 covers DuPage County, IL. It is an overlay: 331 serves the same area, so neighbors can have different area codes.
Overlay, same area: 331
Local time in DuPage County
Spam reports from Sep 23 – Oct 22, 2026
High #115 of 461 codes
673 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneCentral Time
- Local calls1 + 10 digits
- Prefixes798 assigned
- Runs out~1Q 2080
- Unwanted call?Block & report
Spam call reports about 630 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 52 |
| Sep 14 | 117 |
| Sep 21 | 123 |
| Sep 28 | 185 |
| Oct 5 | 142 |
| Oct 12 | 147 |
| Oct 19 (4 days) | 119 |
Compared with all codes
- Robocalls
- 61%all codes 75%
- Callers with the same code
- 65%all codes 35%
- Rank by complaints
- #115of 461 · top quarter
- FCC complaints, Oct 2025 – Sep 2026
- 70712 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Dropped call or no message | 129 15% | |
| Calls pretending to be government, businesses, or family and friends | 87 10% | |
| Reducing your debt (credit cards, mortgage, student loans) | 68 8% | |
| Medical & prescriptions | 42 5% | |
| Home improvement & cleaning | 24 3% | |
| Warranties & protection plans | 11 1% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| Illinois | 705 80% | |
| Wisconsin | 24 3% | |
| California | 19 2% | |
| Texas | 16 2% | |
| Florida | 13 1% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 630 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| ROSELLE | Roselle | spans 2 counties | 77 |
| HINSDALE | Hinsdale | spans 2 counties | 75 |
| LA GRANGE | La Grange | Cook County | 74 |
| NAPERVILLE | Naperville | spans 2 counties | 74 |
| DOWNERSGRV | Downers Grove | DuPage County | 56 |
| AURORA | Aurora | spans 4 counties | 55 |
| ELMHURST | Elmhurst | spans 2 counties | 44 |
| LOMBARD | Lombard | DuPage County | 37 |
| NORTHBROOK | Northbrook | Cook County | 33 |
| WHEATON | Wheaton | DuPage County | 31 |
Plus 23 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
Is 630 running out of numbers?
Previous forecast (October 2025): 2073, moved later by 7 years.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 630 prefixes
The five largest of 23 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Illinois Bell Tel Co. | 258 32% | |
| New Cingular Wireless PCS, LLC | 103 13% | |
| T-Mobile USA, Inc. | 76 10% | |
| Verizon Wireless | 75 9% | |
| Mcimetro Access Transmission Services LLC | 60 8% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 630
What area code is 630?
An Illinois area code, in service since August 3, 1996.
Where is 630 area code, and what time zone is it in?
DuPage County, IL; Central Time.
Why am I getting spam calls from 630?
673 FTC complaints from Sep 23 – Oct 22, 2026, most often about dropped calls or no message (not verified by the FTC; caller ID can be spoofed).
Will 630 get a new area code?
NANPA forecasts exhaust in 1Q 2080; no relief planning listed.