730 area code
Area code 730 is in Illinois. It covers Belleville, O Fallon, Granite City and 122 other places: 112 ZIP codes in St. Clair, Madison, Williamson and 23 other counties. Local time there is , Central Time. In service since 2023 as an overlay: it covers the same area as 618, so a number from there can have either code.
- State
- Illinois
- Time zone
- Central
- Largest city
- Belleville
- Overlays
- 618
- In service since
- 2023
- Rate centres
- 64
- Prefixes assigned
- 130 (1,300,000 numbers)
Who calls from a 730 number
NANPA records the carrier each block of 730 numbers is assigned to. Of the 866,000 730 numbers assigned, 62% are with mobile carriers (AT&T Mobility and Verizon Wireless); 38% with cable, internet-calling, business and other carriers (Teleport Communications (AT&T), Onvoy and Commio).
That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.
| Carrier | Kind | Share |
|---|---|---|
| AT&T Mobility | Mobile | 56% |
| Teleport Communications (AT&T) | Cable, VoIP, other | 13% |
| Onvoy | Cable, VoIP, other | 12% |
| Verizon Wireless | Mobile | 3% |
| Commio | Cable, VoIP, other | 2% |
| Peerless Network Of Illinois | Cable, VoIP, other | 2% |
An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.
Places in area code 730
The 56 places with a telephone rate centre of their own using 730, largest first. Each links to its ZIP codes.
Nearby places using 730
These places have no rate centre of their own in NANPA's records; the nearest one uses 730. Near an area-code boundary that can be wrong for part of a town.
- Fairview Heights
- Swansea
- Shiloh
- Murphysboro
- Pontoon Beach
- Scott Air Force Base
- Caseyville
- Scott AFB
- Smithton
- Madison
- Fairmont City
- Jonesboro
- Washington Park
- Venice
- Carrier Mills
- Hartford
- Mitchell
- Central City
- Texico
- Ozark
- Energy
- Harrison
- Wamac
- Brooklyn
- Lovejoy
- North City
- West City
- Grand Chain
- Makanda
- Golden Eagle
- Whittington
- Valier
- Grand Tower
- Bonnie
- Crab Orchard
- Ruma
- Alto Pass
- Buncombe
- Sauget
- Whiteash
- Alma
- East Cape Girardeau
- Buckner
- Coello
- Olmsted
- Spillertown
- McClure
- Pulaski
- Wolf Lake
- Pomona
- Smithboro
- New Burnside
- New Grand Chain
- Freeman Spur
- Keensburg
- Walnut Hill
- Mulkeytown
- Belknap
- Huey
- Old Shawneetown
ZIP codes in area code 730
112 ZIP codes in 100 towns, by the town each is mailed to, largest first. Each links to its own page.
Where 730 numbers are issued
NANPA's rate centres with the most 730 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.
| Rate centre | Place | Prefixes |
|---|---|---|
CENTRALIA | Centralia | 15 |
HERRIN | Herrin | 13 |
BELLEVILLE | Belleville | 12 |
OLNEY | Olney | 12 |
CARBONDALE | Carbondale | 9 |
COLLINSVL | Collinsville | 5 |
Counties
The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.
- St. Clair County (19)
- Madison County (8)
- Williamson County (7)
- Jackson County (7)
- Marion County (7)
- Jefferson County (7)
- Franklin County (10)
- Monroe County (2)
- Union County (7)
- Richland County (1)
- Perry County (1)
- Clinton County (2)
- Johnson County (5)
- Randolph County (1)
- Massac County (4)
- Bond County (3)
- Alexander County (5)
- Gallatin County (2)
- Saline County (1)
- Pulaski County (5)
- Pope County (1)
- Calhoun County (2)
- Washington County (1)
- Fayette County (1)
- Wayne County (1)
- Wabash County (2)
Which code covers where you are now? What area code am I in? answers from your location.
Questions about area code 730
Where is area code 730?
Area code 730 is in Illinois. It covers Belleville, O Fallon, Granite City and 122 other places: 112 ZIP codes in St. Clair, Madison, Williamson and 23 other counties.
What ZIP codes are in area code 730?
112 ZIP codes, by the town each is mailed to: Belleville (5, 62220 to 62226), O Fallon (62269), Granite City (62040), Alton (62002) and 96 more towns. The full list is on this page.
What time zone is area code 730 in?
Central time.
Is a 730 number a mobile or a landline?
It can be either. 62% of 730 numbers are assigned to mobile carriers and 0% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.
What area codes overlay 730?
618. They cover the same area as 730, so a new number there can be given any of them.
Does a 730 number mean the caller is in Illinois?
Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 730 call can come from anywhere.
Other area codes in Illinois
- 217 Springfield
- 224 Elgin
- 309 Peoria
- 312 Chicago
- 331 Aurora
- 447 Springfield
- 464 Orland Park
- 618 Belleville
- 630 Aurora
- 708 Orland Park
- 773 Chicago
- 779 Rockford
- 815 Rockford
- 847 Elgin
- 861 Peoria
- 872 Chicago
All 17 Illinois area codes, by area, with the cities each covers
Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “Area code 730.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/730
Underlying data is public domain or openly licensed — sources, vintages and licences.