747
Area code
CA
United States geographic area code, in service since 2009-05-18. Part of the 747/818 overlay complex — ten-digit dialing required.
Statusin service
Introduced2009-05-18
JurisdictionCA, US
Local dialing1+10D
Time zonePacific
Last verified2026-09-17
Utilization 34.7% of assignable prefixes assigned
As of 09/17/2026
0%275 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 2009-08-14, most recent 2026-09-14.
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 | T-MOBILE USA, INC. | 53 | 19.3% |
| 02 | ONVOY, LLC - CA | 47 | 17.1% |
| 03 | FRACTEL, LLC | 39 | 14.2% |
| 04 | NEW CINGULAR WIRELESS PCS, LLC | 27 | 9.8% |
| 05 | BANDWIDTH.COM CLEC, LLC - CA | 24 | 8.7% |
| 06 | TON80 COMMUNICATIONS, LLC | 11 | 4% |
| 07 | MULTIPLE OCN LISTING | 9 | 3.3% |
| 08 | LEVEL 3 COMMUNICATIONS, LLC - CA | 9 | 3.3% |
| 09 | METROPCS NETWORKS, LLC | 8 | 2.9% |
| 10 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 7 | 2.5% |
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)
- 2009-05-18Area code 747 entered service (created from 818).
Planning letters & orders
Primary documents| Date | Document | Subject |
|---|---|---|
| 2008-05-07 | PL-378 ↗ | NPA 747 to Overlay NPA 818 (California) |