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US area code · Illinois

Area code 630

Where the 630 area code is, its overlay and how to dial a +1 630 number from anywhere.

CoversAddison, IllinoisTime zoneCentral (CT)TypeOverlay
Quick answer

The 630 area code is in Addison, Illinois, United States (Central (CT)). To call from abroad: +1 630 555-0123. It is an overlay, so all 10 digits are dialled.

StateIllinois
Main areaAddison
Time zoneCentral (CT)
TypeOverlay
10-digit dialingRequired
In service since09-Aug-1994

The 630 area code is a geographic North American Numbering Plan (NANP) code covering Addison, Illinois. It has been in service since 09-Aug-1994 and sits in the Central (CT) time zone.

Overlay 630 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

630331708

How to dial a 630 number

From abroad+1 630 555-0123
Within the US / Canada1 630 555-0123
Locally (same area)630 555-0123

Cities in the 630 area code

A 630 number is usually in one of these places in Illinois — 5 counties.

Addison DupageBartlett DupageBatavia KaneBensenville DupageBloomingdale DupageBolingbrook WillCarol Stream DupageDarien DupageDowners Grove DupageElmhurst DupageGlen Ellyn DupageGlendale Heights DupageHanover Park CookLisle DupageLombard DupageNaperville Dupage;WillNorth Aurora KaneRoselle DupageSaint Charles KaneStreamwood CookVilla Park DupageWest Chicago DupageWestmont DupageWheaton DupageWoodridge Dupage

Other Illinois area codes

217224309312331447464618708730773779815847861872

Frequently asked questions

Where is the 630 area code?

The 630 area code is in Addison, Illinois, United States (Central (CT)).

Is 630 an overlay area code?

Yes. 630 overlays the same region as 331, 708, so callers dial all 10 digits.

Do I have to dial 10 digits for 630?

Yes — dial the area code plus the seven-digit number.

How do I call a 630 number from another country?

Dial your exit code (or +), then 1, then 630, then the number: +1 630 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 630 number does not pinpoint a street or ZIP code.

Missed a call from +1 630?

In the 30 days to September 24, 2026, 586 unwanted calls showing a 630 number were reported to the US Federal Trade Commission, 52% of them recorded messages or robocalls. That puts 630 at #144 of 670 area codes reported.

Other235
Dropped call or no message136
Reducing your debt (credit cards, mortgage, student loans)52
Calls pretending to be government, businesses, or family and friends51
Before you call back
  • If you do not know anyone in Illinois, do not call back: a genuine caller will leave a message or send a text.
  • Scammers fake the number shown on caller ID, so a 630 number can hide a caller anywhere in the world.
  • Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.

Who issues +1 630 numbers

Phone companies hold blocks of numbers in each area code. The main holders in 630:

Illinois Bell Tel Co 258New Cingular Wireless PCS, LLC 103T-Mobile USA, Inc. 76Cellco Partnership Dba Verizon Wireless 75Teleport Communications America, LLC 57Level 3 Communications, LLC 56

About 31.8% of the 800 prefixes in use belong to mobile carriers: a 630 number is often a cell phone, and it may have moved to another carrier since.

Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.

All US area codes United States +1 Map of area code 630 — cities & rate centres