707
Area code
CA
United States geographic area code, in service since 1959-01-01. Part of the 369/707 overlay complex — ten-digit dialing required.
Statusin service
Introduced1959-01-01
JurisdictionCA, US
Local dialing1+10D
Time zonePacific
Last verified2026-09-17
Utilization 101% of assignable prefixes assigned
As of 09/17/2026
0%800 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 2001-01-25, most recent 2026-07-30.
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 | PACIFIC BELL | 225 | 28.1% |
| 02 | ONVOY, LLC - CA | 96 | 12% |
| 03 | NEW CINGULAR WIRELESS PCS, LLC | 67 | 8.4% |
| 04 | LEVEL 3 COMMUNICATIONS, LLC - CA | 58 | 7.2% |
| 05 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 55 | 6.9% |
| 06 | T-MOBILE USA, INC. | 31 | 3.9% |
| 07 | METROPCS, INC. | 28 | 3.5% |
| 08 | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 24 | 3% |
| 09 | BANDWIDTH.COM CLEC, LLC - CA | 24 | 3% |
| 10 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 21 | 2.6% |
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- 2022-08-01 NPA 369 to Overlay NPA 707 (California)
- 1959-01-01Area code 707 entered service (created from 415).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2022-08-01 | PL-599 ↗ | NPA 369 to Overlay NPA 707 (California) |
| 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 |
| 2011-06-21 | PL-421 ↗ | NPA 415, 619, 650, 707 - Relief Plans Dismissed (California) |
| 2000-07-27 | PL-238 ↗ | Suspension of Splits of the 707 & 760 NPAs (California) |
| 2000-02-01 | PL-210 ↗ | 707 NPA Splits, Creating 369 and 627 NPAs (California) |
| 1999-02-23 | PL-159 ↗ | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 707 NPA (California) |