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US area code · Illinois

630 area code

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.

Number holders in area code 630

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 800 prefixes are in use in 630, shared by 24 companies. The largest holders:

CompanyPrefixesShare
Illinois Bell Tel Co25832%
New Cingular Wireless PCS, LLC10313%
T-Mobile USA, Inc.7610%
Cellco Partnership Dba Verizon Wireless759%
Teleport Communications America, LLC577%
Level 3 Communications, LLC567%

Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.

Complaints about 630 numbers

Reports to the FTC, last 30 days
586
Recorded messages or robocalls
52%
Rank among area codes
#144 of 670
Most reported subjects
Other (235)
Dropped call or no message (136)
Reducing your debt (credit cards, mortgage, student loans) (52)

Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.

Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).

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

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