341
Area code
CA
United States geographic area code, in service since 2019-07-22. Part of the 341/510 overlay complex — ten-digit dialing required.
Statusin service
Introduced2019-07-22
JurisdictionCA, US
Local dialing1+10D
Time zonePacific
Last verified2026-09-17
Utilization 16% of assignable prefixes assigned
As of 09/17/2026
0%127 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 2019-05-31, most recent 2026-09-02.
Area codes serve rate-center geographies, not municipal boundaries. “CA” identifies the jurisdiction, not an exact city footprint.
Top assignees
Ranked by assigned prefixes · initial assignee ≠ current carrier| Rank | Assignee | Prefixes | Share |
|---|---|---|---|
| 01 | FRACTEL, LLC | 33 | 26% |
| 02 | ONVOY, LLC - CA | 24 | 18.9% |
| 03 | T-MOBILE USA, INC. | 12 | 9.4% |
| 04 | NEW CINGULAR WIRELESS PCS, LLC | 12 | 9.4% |
| 05 | MULTIPLE OCN LISTING | 9 | 7.1% |
| 06 | BANDWIDTH.COM CLEC, LLC - CA | 8 | 6.3% |
| 07 | 6 | 4.7% | |
| 08 | SONIC TELECOM, LLC - CA | 4 | 3.1% |
| 09 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 4 | 3.1% |
| 10 | WIDE VOICE, LLC - CA | 2 | 1.6% |
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- 2018-07-30 NPA 341 to Overlay 510 (California) other
- 2019-07-22Area code 341 entered service (created from 510).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2018-07-30 | PL-518 ↗ | NPA 341 to Overlay 510 (California) |