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730 Area Code

Area code 730 serves Belleville, O'Fallon, Granite City, Alton, Collinsville and nearby communities in Illinois. It has been in service since July 7, 2023, when it was split from 618.

StateIllinois
Time zoneCentral
Local time now…
Prefixes in use130
Overlay with618
Projected to run out2040
BellevilleO'FallonGranite CityAltonCollinsvilleCarbondaleEast St. LouisGodfreyMarionCahokia HeightsFairview HeightsShilohSwanseaMount VernonHerrinTroyCentraliaColumbiaOlneySalemMurphysboroBentonPontoon BeachCartervilleBellevilleO'FallonGranite CityAltonCarbondale
Cities and towns served by area code 730

Who issues 730 numbers

Mobile 39%VoIP and cable 49%Landline 12%

Share of the 130 prefixes (the three digits after 730) assigned to each type of carrier. Classification by carrier name, approximate.

CarrierPrefixes
AT&T Mobility44
Onvoy (Sinch)39
AT&T (Teleport)12
T-Mobile5
Commio4
At&T Enterprises3
Charter Ip Enabled Services3
Lumen (Level 3)3

Cities and towns in area code 730

CityPopulationOther area codes
Belleville40,237618
O'Fallon32,656618
Granite City26,807618
Alton25,013618
Collinsville23,717618
Carbondale21,811618
East St. Louis17,682618
Godfrey17,620618
Marion17,148618
Cahokia Heights16,874618
Fairview Heights16,175618
Shiloh14,604618
Swansea14,356618
Mount Vernon14,187618
Herrin12,268618
Troy11,893618
Centralia11,863618
Columbia10,865618
Olney8,347618
Salem7,035618
Murphysboro6,977618
Benton6,558618
Pontoon Beach5,887618
Carterville5,839618

Got a call from 730?

A 730 number was originally issued in Illinois, but that does not prove the caller is there. 49% of 730 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.

All 130 prefixes in area code 730

Format: (730) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.

Questions about area code 730

Where is area code 730?
Area code 730 is in Illinois. It covers Belleville, O'Fallon, Granite City, Alton, Collinsville, Carbondale and 18 more cities and towns.
What time zone is area code 730?
Area code 730 is in the Central time zone.
Is 730 a toll-free number?
No. 730 is a geographic area code in Illinois. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
Why does 730 share its area with 618?
618 and 730 form an overlay: they cover the same territory, so new numbers there can get any of these codes, and local calls need all 10 digits.
Will area code 730 run out of numbers?
NANPA's latest forecast projects the 618/730 overlay to exhaust in the fourth quarter of 2040. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.

Other area codes in Illinois