730
Area code
IL
United States geographic area code, in service since 2023-07-07. Part of the 618/730 overlay complex — ten-digit dialing required.
Statusin service
Introduced2023-07-07
JurisdictionIL, US
Local dialing10D
Time zoneCentral
Last verified2026-09-17
Utilization 17.9% of assignable prefixes assigned
As of 09/17/2026
0%142 of ~792 assignable NXX values (200–999 excl. N11)100%
Prefix-level assignment does not equal number-level exhaustion; thousands-block pooling extends capacity. First assignment on record 2023-08-23, most recent 2026-08-27.
Area codes serve rate-center geographies, not municipal boundaries. “IL” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | NEW CINGULAR WIRELESS PCS, LLC - IL | 43 | 30.3% |
| 02 | ONVOY, LLC | 30 | 21.1% |
| 03 | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 12 | 8.5% |
| 04 | ONVOY SPECTRUM, LLC | 9 | 6.3% |
| 05 | MULTIPLE OCN LISTING | 9 | 6.3% |
| 06 | T-MOBILE USA, INC. | 5 | 3.5% |
| 07 | 5 | 3.5% | |
| 08 | COMMIO, LLC | 4 | 2.8% |
| 09 | LEVEL 3 COMMUNICATIONS, LLC - IL | 3 | 2.1% |
| 10 | CHARTER IP ENABLED SERVICES, LLC | 3 | 2.1% |
Important: these are initial assignees from NANPA CO-code records — the carrier a prefix was originally assigned to. Because of number portability, the current serving carrier of any individual number may differ.
Change history
Recorded events for this NPA- 2022-06-15 NPA 730 to Overlay NPA 618 (Illinois)
- 2023-07-07Area code 730 entered service (created from 618).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2022-06-15 | PL-595 ↗ | NPA 730 to Overlay NPA 618 (Illinois) |