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US area code · Illinois

730 area code

Where the 730 area code is, its overlay and how to dial a +1 730 number from anywhere.

CoversIllinoisTime zoneCentral (CT)TypeOverlay
Quick answer

The 730 area code is in Illinois, United States (Central (CT)). To call from abroad: +1 730 555-0123. It is an overlay, so all 10 digits are dialled.

StateIllinois
Time zoneCentral (CT)
TypeOverlay
10-digit dialingRequired
In service since21-Apr-2005

The 730 area code is a geographic North American Numbering Plan (NANP) code covering Illinois. It has been in service since 21-Apr-2005 and sits in the Central (CT) time zone.

Overlay 730 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.

How to dial a 730 number

From abroad+1 730 555-0123
Within the US / Canada1 730 555-0123
Locally (same area)730 555-0123

Other Illinois area codes

Frequently asked questions

Where is the 730 area code?

The 730 area code is in Illinois, United States (Central (CT)).

Is 730 an overlay area code?

Yes. 730 overlays the same region as 618, so callers dial all 10 digits.

Do I have to dial 10 digits for 730?

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

How do I call a 730 number from another country?

Dial your exit code (or +), then 1, then 730, then the number: +1 730 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 730 number does not pinpoint a street or ZIP code.

Number holders in area code 730

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 142 prefixes are in use in 730, shared by 24 companies. The largest holders:

CompanyPrefixesShare
New Cingular Wireless PCS, LLC4330%
Onvoy, LLC3021%
Teleport Communications America, LLC128%
Multiple Ocn Listing96%
Onvoy Spectrum, LLC96%
54%

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

Complaints about 730 numbers

Reports to the FTC, last 30 days
34
Recorded messages or robocalls
68%
Rank among area codes
#394 of 670
Most reported subjects
Reducing your debt (credit cards, mortgage, student loans) (11)
Other (10)
Dropped call or no message (4)

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 730 — cities & rate centres

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