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Area code 630

Area code 630 Roselle, Illinois

Area code 630 is in Illinois, with numbers assigned in Roselle, Hinsdale, Naperville and 30 more places. It’s 11:13 PM there now.

State
Illinois17 area codes in Illinois
Time zone
Central11:13 PM there now
Exchanges
78233 places
Overlay
331Same area, 10-digit dialing
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Where area code 630 is

Numbers in 630 are assigned to 33 places in 6 counties: DuPage County, Cook County, Will County, Kane County, Kendall County and Lake County.

No single place dominates: Roselle, the largest, has 10% of the exchanges.

  • Roselle77
  • Hinsdale75
  • Naperville74
  • La Grange74
  • Downers Grove56
  • Aurora55
  • Elmhurst44
  • Lombard37
  • Northbrook33
  • Wheaton31
  • Bensenville24
  • Lemont21
  • West Chicago20
  • Itasca17
  • St. Charles17
  • Geneva16
  • Bartlett16
  • Glen Ellyn14
  • Batavia13
  • Sugar Grove11
  • Warrenville9
  • Wheeling7
  • Big Rock6
  • Oswego6

Phone companies in 630

782 blocks of numbers in 630 are held by 20 phone companies. The most belong to AT&T (258), AT&T Mobility (103) and T-Mobile (80).

A mix: about 33% wireless, 34% local phone and cable and 33% other carriers, including internet phone services.

A block’s holder is the company it was first assigned to; numbers can move to other carriers since.

History and overlays

630 went into service in 1996, added to the area of 708.

331 (since 2007) shares the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.

6 new exchanges were assigned since 2021, the latest in July 2026.

Calling 630

It’s 11:13 PM Central time in 630 right now.

From elsewhere in the U.S., dial 1, 630 and the 7-digit number; inside the area, all 10 digits too.

Nearby area codes

Illinois has 17 area codes: 217, 224, 309, 312, 331, 447, 464, 618, 630, 708, 730, 773, 779, 815, 847, 861 and 872.

From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.

Map of the 630 area code

Map of the 630 area code around Roselle, Hinsdale and Naperville, Illinois.

Interactive map © OpenStreetMap contributors

Cities on the map

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Questions about 630

Where is area code 630?

In Illinois, covering Roselle, Hinsdale and Naperville and other places across 6 counties.

What time zone is 630 in?

Central time. It was 11:13 PM there when this page loaded.

Is 630 an overlay?

Yes. 331 serves the same area, so dial all 10 digits for local calls.

Which phone companies have 630 numbers?

20 companies hold blocks; the most belong to AT&T, AT&T Mobility and T-Mobile. About 33% of blocks are wireless.

Is 630 running out of numbers?

Not on record. 6 new exchanges have been assigned since 2021.