818
Area code
CA
United States geographic area code, in service since 1984-01-07. Part of the 747/818 overlay complex — ten-digit dialing required.
Split from 213. Created 626. Created 747. Overlaid with 747 .
Statusin service
Introduced1984-01-07
JurisdictionCA, US
Local dialing1+10D
Time zonePacific
Last verified2026-09-17
Utilization 100.3% of assignable prefixes assigned
As of 09/17/2026
0%794 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 2025-12-11.
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 | 266 | 33.5% |
| 02 | NEW CINGULAR WIRELESS PCS, LLC | 73 | 9.2% |
| 03 | T-MOBILE USA, INC. | 71 | 8.9% |
| 04 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 63 | 7.9% |
| 05 | FRONTIER CALIFORNIA INC. | 37 | 4.7% |
| 06 | LEVEL 3 COMMUNICATIONS, LLC - CA | 29 | 3.7% |
| 07 | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 23 | 2.9% |
| 08 | SPOK, INC. | 23 | 2.9% |
| 09 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 22 | 2.8% |
| 10 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 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- 2008-05-07 NPA 747 to Overlay NPA 818 (California)
- 1984-01-07Area code 818 entered service (created from 213).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2008-05-07 | PL-378 ↗ | NPA 747 to Overlay NPA 818 (California) |
| 1998-07-24 | PL-130 ↗ | Extraordinary Jeopardy Procedures for 818 NPA in California |