414
Area code
Statusin service
Introduced1947-01-01
JurisdictionWI, US
Local dialing10D
Time zoneCentral
Last verified2026-09-17
Utilization 71.6% of assignable prefixes assigned
As of 09/17/2026
0%567 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 2001-02-02, most recent 2026-08-21.
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 | WISCONSIN BELL INC | 190 | 33.5% |
| 02 | T-MOBILE USA, INC. | 54 | 9.5% |
| 03 | NEW CINGULAR WIRELESS PCS, LLC - IL | 51 | 9% |
| 04 | UNITED STATES CELLULAR - WI | 47 | 8.3% |
| 05 | ONVOY, LLC - WI | 31 | 5.5% |
| 06 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI | 25 | 4.4% |
| 07 | TELEPORT COMMUNICATIONS AMERICA, LLC WI | 18 | 3.2% |
| 08 | SPOK, INC. | 18 | 3.2% |
| 09 | LEVEL 3 COMMUNICATIONS, LLC - WI | 14 | 2.5% |
| 10 | PAETEC ITEL, LLC | 13 | 2.3% |
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- 1998-10-05 Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for Wisconsin NPA 414 jeopardy
- 1947-01-01Area code 414 entered service.
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2021-01-08 | PL-556 ↗ | Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Lifeline) – supersedes PL-544 |
| 2020-08-17 | PL-544 ↗ | Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline |