Area code 730 – Illinois
730 has served Illinois since 2023, split from 618. It is still largely empty: 130 of 786 number blocks allocated. AT&T is the largest holder with 45.4% of blocks, ahead of Onvoy / Inteliquent at 23.1%. It shares its geography with overlay codes 618, so local calls take all ten digits. Spam complaints are comparatively rare: 37 in the 33 days to 30 October 2026, 391st of the 422 codes with five or more complaints.
Who holds 730 number blocks
Share of the 130 assigned NXX blocks (16.5% of the 786 possible), across 22 carriers. This is share of number blocks, not of subscribers.
- AT&T45.4%
- Onvoy23.1%
- Other CLEC / VoIP11.5%
- Charter9.2%
- T-Mobile4.6%
- Lumen2.3%
- Verizon1.5%
- Bandwidth1.5%
- Peerless0.8%
Spam complaints naming 730
FTC Do Not Call complaints where the caller ID was a 730 number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are frequently spoofed, so these are complaints about the code, not calls proven to originate in it.
Rate centers in 730
NANPA allocates number blocks to rate centers and records their names abbreviated to ten characters, so these are NANPA's codes rather than place names – CHAMPAURBN is Champaign-Urbana, NWYRCYZN01 is a New York City zone. We show them unchanged instead of guessing at the full names. Showing the largest 5 of 64.
Timeline
- 2023 730 goes into service, split from or overlaid on 618.
More about 730
Separate pages for the questions that need their own answer: what time it is there, what the complaint data says, who holds the number blocks, and how the code compares with the one it shares its area with.
Frequently asked about 730
What state is area code 730?
Illinois. It covers the same area as 618/730.
Is a call from 730 a scam?
Not by itself. 730 drew 37 FTC complaints in the 33 days to 30 October 2026, 391st of 422 ranked codes – mid-pack or lower. Spam callers spoof caller IDs, so the only useful check is the full number.
Which carrier owns 730 numbers?
AT&T holds the largest share of assigned number blocks at 45.4%. The rest is spread across 3 other carriers. This is share of number blocks, not of subscribers – people keep their numbers when they switch carriers.
Do I need to dial 10 digits in 730?
Yes – ten digits for local calls in 730, because it shares its area with another code.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 25 daily files 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
NANPA dialing note for this code: “10D”. Reviewed by the data desk. Spotted an error? Request a correction.