715
Area code
WI
United States geographic area code, in service since 1947-01-01. Part of the 534/715 overlay complex — ten-digit dialing required.
Statusin service
Introduced1947-01-01
JurisdictionWI, US
Local dialing10D
Time zoneCentral
Last verified2026-09-17
Utilization 100.9% of assignable prefixes assigned
As of 09/17/2026
0%799 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 2001-01-09, most recent 2026-06-24.
Area codes serve rate-center geographies, not municipal boundaries. “WI” 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 | 100 | 12.5% |
| 02 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 99 | 12.4% |
| 03 | FRONTIER NORTH INC. - WI | 55 | 6.9% |
| 04 | WISCONSIN BELL INC | 41 | 5.1% |
| 05 | CHARTER IP ENABLED SERVICES, LLC | 36 | 4.5% |
| 06 | TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK | 31 | 3.9% |
| 07 | LEVEL 3 COMMUNICATIONS, LLC - WI | 29 | 3.6% |
| 08 | FRONTIER COMMUNICATIONS OF WISCONSIN LLC | 27 | 3.4% |
| 09 | ONVOY, LLC - WI | 23 | 2.9% |
| 10 | NEW CELL DBA CELLCOM | 22 | 2.8% |
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- 2008-12-22 NPA 534 to Overlay NPA 715 (Wisconsin)
- 1947-01-01Area code 715 entered service.
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2008-12-22 | PL-384 ↗ | NPA 534 to Overlay NPA 715 (Wisconsin) |