730 Area Code: Centralia, Illinois
Area code 730 serves Centralia, Belleville and Herrin, Illinois in the Central time zone, in service since 2023. Consumers have filed 122 unwanted-call complaints against 107 different 730 numbers, 27 of them with the FTC in the last 30 days. Look up the exact number that called you below.
Area code 730 at a glance
- State
- Illinois
- Main cities
- Centralia, Belleville, Herrin, Olney, Carbondale, Collinsville + 56 more
- Counties
- Marion County, Williamson County, St. Clair County, Jackson County + 21 more
- Local time
- —Central
- In service since
- July 7, 2023
- Overlay of
- 618
- Local dialing
- 10 digits (area code + number)
- Exchanges
- 64 rate centers, 131 prefixes
Sources: NANPA area code and central office code records (refreshed weekly); cities and counties matched from US Census Bureau and USGS place names.
Reported 730 numbers
No single 730 number has enough complaints yet for a full report page, so none are listed. Look up the exact number that called you: the lookup works on every US number, whether or not it has complaint history.
What calls from 730 numbers are about
90 FTC Do Not Call complaints about 730 numbers since Jul 24. The most common named subject is debt-relief pitches, at 27% of complaints (95% of those were recorded messages). Overall, 75% of callers who answered said the call was a robocall.
FTC complaint subjects
- Other / unspecified2730%
- Debt reduction2427%
- Impostor (government, business, family)1213%
- Dropped call / no message1213%
- No subject given56%
- Medical & prescriptions33%
- Warranties & protection plans22%
FCC complaints by call type, last 2 years
- Prerecorded Voice1267%
- Live Voice422%
- Text Message211%
11% of recent FCC complaints about 730 numbers are about text messages, not calls.
When 730 spam calls come in
32% of complaints that give a call time describe calls between 9am and 12pm. 94% came Monday to Friday, most on Mondays, the pattern of call-center robocall campaigns that run on business hours. Times are as consumers reported them to the FTC.
By hour of the day
By day of the week
Is it getting worse?
26 FTC complaints about 730 numbers in the last four weeks, down 19% on the four weeks before. FCC complaints about 730 numbers peaked in 2026 (13); the FTC's daily Do Not Call data has carried most of the volume since mid-2026.
FTC complaints per week
FCC complaints per year
Years shown as '15 to '26; the current year is partial.
Who gets these calls
Only 40% of the FTC complaints about 730 numbers came from Illinois residents; the most came from California, Massachusetts and Ohio. 730 numbers are being used for nationwide campaigns, so the area code says little about where the caller is.
Where complainants live
- Illinois3640%
- California78%
- Massachusetts56%
- Ohio56%
- New Jersey44%
Busiest 730 prefixes this month
FTC complaints in the last 30 days, grouped by the first six digits. When one prefix collects complaints about many different numbers, a campaign is usually cycling through that block. The carrier is who NANPA assigned the prefix to, not who made the calls.
| Prefix | Complaints | Numbers | Carrier | Exchange |
|---|---|---|---|---|
| (730) 240-xxxx | 8 | 7 | Onvoy (Sinch) | O'Fallon |
| (730) 236-xxxx | 7 | 7 | T-Mobile USA | Troy |
Carriers operating in 730
NANPA has assigned 131 730 prefixes (NPA-NXX central-office codes) across 64 rate centers: 40% to wireless carriers, 58% to landline and VoIP operators; 100% are pooled blocks shared by several carriers. 25 prefixes were assigned in the last 12 months (newest 2026-10-05). The carrier holding a prefix is who the number was issued through. It says nothing about who is calling, since caller ID is routinely spoofed.
| Carrier | Type | Prefixes | Rate centers | Newest assignment |
|---|---|---|---|---|
| AT&T Mobility (New Cingular Wireless PCS) | Wireless | 44(34%) | 8 | 2026-09-28 |
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 30(23%) | 30 | 2026-01-27 |
| Teleport Communications America, LLC | Competitive / VoIP (CLEC) | 12(9%) | 1 | 2025-04-14 |
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 9(7%) | 9 | 2025-01-03 |
| T-Mobile USA | Wireless | 6(5%) | 6 | 2024-02-08 |
| Commio, LLC | Competitive / VoIP (CLEC) | 4(3%) | 4 | 2023-09-28 |
| At&T Enterprises, LLC | Competitive / VoIP (CLEC) | 3(2%) | 3 | 2025-07-08 |
| Charter (Spectrum Voice) | Competitive / VoIP (CLEC) | 3(2%) | 3 | 2025-09-08 |
| Level 3 (Lumen) | Competitive / VoIP (CLEC) | 3(2%) | 3 | 2026-03-18 |
| Bandwidth.com | Competitive / VoIP (CLEC) | 2(2%) | 2 | 2025-09-26 |
| Verizon Wireless (Cellco Partnership) | Wireless | 2(2%) | 2 | 2025-01-14 |
| Nuso, LLC | Competitive / VoIP (CLEC) | 2(2%) | 2 | 2025-05-30 |
Largest rate centers (exchanges) by prefixes: Centralia (15), Belleville (13), Herrin (13), Olney (12), Carbondale (9), Collinsville (5), Cairo (3), Granite City (3), Alton (2), East St. Louis (2). Source: NANPA Central Office Code Utilized Assignments (public, refreshed weekly).
What to do about calls from 730 numbers
Before you call back
- Debt reduction is the top named complaint here. Don't pay upfront fees for debt relief; the FTC's Telemarketing Sales Rule bans them. Talk to your lender or a nonprofit credit counselor instead. Read about debt-relief robocalls.
- Look up the full number above. A missed call from 730 with no voicemail is usually a robocall; anyone who needs you will leave a message.
- Block repeat callers: iPhone, Android, or your carrier's free filter (Verizon, AT&T, T-Mobile).
Report it in Illinois
- Unwanted sales calls and robocalls: donotcall.gov (FTC). Scams and fraud: ReportFraud.ftc.gov.
- Spoofing, texts and call-blocking problems: FCC consumer complaints.
- State complaints: Illinois Attorney General.
- Illinois formally adopted the FTC's National Do Not Call Registry as its own state list rather than running a separate one, so a single free registration at donotcall.gov covers you. State authorities can still enforce against telemarketers who ignore it, in addition to any federal penalty.
Your FTC and FCC reports are published (without your name or number) in the datasets this page is built from. How to report unwanted calls.
Area code 730: questions answered from the data
Where is area code 730?
Area code 730 serves Centralia, Belleville and Herrin, Illinois, covering Marion County, Williamson County and St. Clair County and 22 more counties. It has been in service since July 7, 2023.
What time zone is area code 730 in?
Area code 730 is in the Central time zone (UTC−6, or UTC−5 during daylight saving time). The current local time is shown at the top of this page.
What are calls from 730 numbers usually about?
Since Jul 24, consumers filed 90 FTC Do Not Call complaints about 730 numbers. The most common named subject was debt-relief pitches: 27% of complaints, 95% of them recorded messages. Across all subjects, 75% of callers who answered the question said the call was a robocall.
When do 730 spam calls happen?
32% of the complaints that give a call time describe calls between 9am and 12pm, and 94% came on weekdays, most often on Monday. Times are as consumers reported them.
Are calls from 730 numbers really local?
Not necessarily. Only 40% of the FTC complaints about 730 numbers came from Illinois residents; the most came from California, Massachusetts and Ohio. 730 numbers are being used for nationwide campaigns, so the area code says little about where the caller is.
Are 730 robocalls increasing?
In the four weeks to Oct 20, consumers filed 26 FTC complaints about 730 numbers, 19% fewer than the four weeks before.
How do I report a 730 scam call in Illinois?
Report unwanted sales calls and robocalls to the FTC at donotcall.gov, and scams to ReportFraud.ftc.gov. The FCC takes complaints at consumercomplaints.fcc.gov. In Illinois, the Illinois Attorney General also handles consumer complaints about scam calls. Reports feed the public data this page is built from.
Overlay and nearby area codes
Sources: FTC Do Not Call complaints (unverified consumer reports), published every weekday and available here from Jul 24; FCC Consumer Complaint Data, public record, imported nightly; NANPA numbering records. A number appearing here means consumers reported calls that displayed it. Caller ID can be spoofed.