319
Area code
Statusin service
Introduced1947-01-01
JurisdictionIA, US
Local dialing10D
Time zoneCentral
Last verified2026-09-17
Utilization 73.1% of assignable prefixes assigned
As of 09/17/2026
0%579 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 2001-01-19, most recent 2026-03-19.
Area codes serve rate-center geographies, not municipal boundaries. “IA” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | QWEST CORPORATION | 99 | 17.1% |
| 02 | UNITED STATES CELLULAR - IA | 39 | 6.7% |
| 03 | T-MOBILE USA, INC. | 39 | 6.7% |
| 04 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 39 | 6.7% |
| 05 | WINDSTREAM IOWA COMMUNICATIONS, INC. | 37 | 6.4% |
| 06 | MCC TELEPHONY LLC | 33 | 5.7% |
| 07 | ONVOY, LLC - IA | 22 | 3.8% |
| 08 | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 21 | 3.6% |
| 09 | TON80 COMMUNICATIONS, LLC | 17 | 2.9% |
| 10 | PAETEC ITEL, LLC | 16 | 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- 1947-01-01Area code 319 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 |
| 2001-01-02 | PL-253 ↗ | 319 NPA Split, Creating 563 NPA (Iowa) |