Area code 424 covers part of Californiastate, covering most of Los Angeles counties. It was started on Aug 26, 2006. This region follows US/Pacific + Daylight Savings timezone. Other popular area codes that belong to California state include 209, 213, 310, 323, 408, 415, 442, 510, 530, 559, 562, 619, 626, 628, 650, 657, 661, 669, 707, 714, 747, 760, 805, 818, 831, 858, 909, 916, 925, 949, 951.
| Date Changed | Change Details |
| May 21, 2013 | Area code 310 subscribers are now overlayed with area code 424. Subscriber area code 424-999 was assigned on Dec 12, 2012 and is operational from May 21, 2013. |
| Mar 28, 2013 | Area code 310 subscribers are now overlayed with area code 424. Subscriber area code 424-903 was assigned on Dec 13, 2006 and is operational from Mar 28, 2013. |
| Nov 14, 2012 | Area code 310 subscribers are now overlayed with area code 424. Subscriber area code 424-901 was assigned on Jun 14, 2006 and is operational from Nov 14, 2012. |
| Apr 30, 2012 | Area code 310 subscribers are now overlayed with area code 424. Subscriber area code 424-900 was assigned on Apr 04, 2012 and is operational from Apr 30, 2012. |
| Area Code | City | County | Population | Network Operator |
| 424-900-0 | Los Angeles | Los Angeles | 981,860 | CF Communications LLC dba Telekenex - CA |
| 424-900-5 | Los Angeles | Los Angeles | 981,860 | Mosaic Networx LLC - CA |
| 424-901-0 | Burbank | Los Angeles | 981,860 | Sprint Spectrum LP |
| 424-901-8 | Long Beach | Los Angeles | 981,860 | XO California Inc |
| 424-901-1 | Los Angeles | Los Angeles | 981,860 | Level 3 Communications LLC - CA |
| 424-901-2 | Los Angeles | Los Angeles | 981,860 | Pac-West Telecomm Inc - CA |
| 424-901-4 | Los Angeles | Los Angeles | 981,860 | Utility Telephone Inc - CA |
| 424-901-3 | Torrance | Los Angeles | 981,860 | T-Mobile USA Inc |
| 424-903-4 | Gardena | Los Angeles | 981,860 | Pacific Bell (Competitive) |
| 424-903-7 | Irvine | Los Angeles | 981,860 | tw telecom of california LP - CA |
| 424-903-3 | Long Beach | Los Angeles | 981,860 | XO California Inc |
| 424-903-8 | Los Angeles | Los Angeles | 981,860 | 360networks (USA) Inc - CA |
| 424-903-0 | Los Angeles | Los Angeles | 981,860 | Curatel LLC - CA |
| 424-903-0 | Los Angeles | Los Angeles | 981,860 | Level 3 Communications LLC - CA |
| 424-903-9 | Santa Fe Springs | Los Angeles | 981,860 | Sprint Spectrum LP |
| 424-911 | 643,913 | Emergency Services | ||
| 424-950 | 825,952 | FGB Access Code | ||
| 424-958 | 354,960 | Standard Plant Test Code | ||
| 424-959 | 542,961 | Standard Plant Test Code | ||
| 424-976 | 781,978 | Information Provider | ||
| 424-999-7 | Los Angeles | Los Angeles | 981,860 | 360networks (USA) Inc - CA |
| 424-999-8 | Los Angeles | Los Angeles | 981,860 | Bandwidth.com CLEC LLC - CA |
| 424-999-1 | Los Angeles | Los Angeles | 981,860 | Level 3 Communications LLC - CA |
| 424-999-2 | Los Angeles | Los Angeles | 981,860 | Peerless Network of California LLC - CA |
| 424-999-0 | Los Angeles | Los Angeles | 981,860 | TelCentris Communications LLC - CA |
| 424-999-4 | Santa Ana | Los Angeles | 981,860 | XO California Inc |
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