Area code
Area code 730 — Centralia, IL
Illinois · in service since July 7, 2023
Area code 730 covers parts of Illinois; the place with the most of its prefixes is Centralia. It is an overlay: 618 serves the same area, so neighbors can have different area codes.
Overlay, same area: 618
Local time in Centralia
Spam reports from Sep 23 – Oct 22, 2026
Low #398 of 461 codes
31 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneCentral Time
- Local calls10 digits
- Prefixes144 assigned
- Runs out~4Q 2040
- Unwanted call?Block & report
Spam call reports about 730 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 0 |
| Sep 14 | 14 |
| Sep 21 | 7 |
| Sep 28 | 4 |
| Oct 5 | 2 |
| Oct 12 | 10 |
| Oct 19 (4 days) | 11 |
Compared with all codes
- Robocalls
- 80%all codes 75%
- Callers with the same code
- 2%all codes 35%
- Rank by complaints
- #398of 461 · bottom quarter
- FCC complaints, Oct 2025 – Sep 2026
- 131 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Reducing your debt (credit cards, mortgage, student loans) | 18 38% | |
| Calls pretending to be government, businesses, or family and friends | 5 10% | |
| Dropped call or no message | 3 6% | |
| Energy, solar, & utilities | 2 4% | |
| Medical & prescriptions | 1 2% | |
| Work from home & other ways to make money | 1 2% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| Illinois | 9 19% | |
| California | 7 15% | |
| Massachusetts | 6 12% | |
| New Jersey | 4 8% | |
| Georgia | 3 6% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 730 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| CENTRALIA | Centralia | spans 4 counties | 15 |
| HERRIN | Herrin | Williamson County | 13 |
| BELLEVILLE | Belleville | St. Clair County | 12 |
| OLNEY | Olney | Richland County | 12 |
| CARBONDALE | Carbondale | spans 2 counties | 9 |
| COLLINSVL | Collinsville | spans 2 counties | 5 |
| CAIRO | Cairo | Alexander County | 3 |
| GRANITE CY | Granite City | Madison County | 3 |
| ALTON | Alton | Madison County | 2 |
| E ST LOUIS | East St. Louis | St. Clair County | 2 |
Plus 54 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- Illinois
- Assigned by NANPA
- April 21, 2005
- Local dialing
- 10 digits (NANPA: 10D)
- NANPA planning letters
- PL-595
Source: NANPA, NPA database of Oct 24, 2026.
Is 730 running out of numbers?
Previous forecast (October 2025): 2040, the same year.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 730 prefixes
The five largest of 24 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| New Cingular Wireless PCS, LLC | 44 31% | |
| Onvoy, LLC | 30 21% | |
| Teleport Communications America, LLC | 12 8% | |
| Multiple Ocn Listing | 9 6% | |
| Onvoy Spectrum, LLC | 9 6% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 730
What area code is 730?
An Illinois area code, in service since July 7, 2023.
Where is 730 area code, and what time zone is it in?
Centralia, IL; Central Time.
Why am I getting spam calls from 730?
31 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).
Will 730 get a new area code?
NANPA forecasts exhaust in 4Q 2040; no relief planning listed.