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Larkspur, CA Area Codes
Larkspur, California (population 12,620) uses area codes 415 and 628.
Larkspur has no telephone exchange of its own in NANPA records; it is served by the Corte Madera exchange about 2.2 km away.
Carriers with Larkspur numbers
20 prefixes are assigned to the Corte Madera exchange: 15% mobile, 55% VoIP and cable, 30% landline.
| Carrier | Prefixes |
|---|---|
| Onvoy (Sinch) | 3 |
| Bandwidth | 3 |
| AT&T (Pacific Bell) | 3 |
| Verizon Business (MCImetro) | 2 |
| T-Mobile | 2 |
| Fractel | 2 |
| AT&T (Teleport) | 1 |
| Lumen (Level 3) | 1 |
Area codes used in Larkspur
| Area code | Prefixes serving Larkspur | Main carriers in this code |
|---|---|---|
| 415 | 13 | AT&T (Pacific Bell), AT&T Mobility, Verizon Wireless |
| 628 | 7 | Onvoy (Sinch), Fractel, T-Mobile |
Larkspur phone number prefixes
Numbers starting with these first six digits were originally assigned to the Corte Madera exchange.
415-329Onvoy (Sinch)415-413AT&T (Teleport)415-496Lumen (Level 3)415-548Onvoy (Sinch)415-737Verizon Business (MCImetro)415-758Tpx Communications415-849Bandwidth415-886Verizon Business (MCImetro)415-891Comcast (Xfinity)415-924AT&T (Pacific Bell)415-927AT&T (Pacific Bell)415-936AT&T Mobility415-945AT&T (Pacific Bell)628-212Bandwidth628-252T-Mobile628-266Bandwidth628-302T-Mobile628-386Fractel628-842Fractel628-877Onvoy (Sinch)
Nearby cities in area code 415
- San Francisco
- San Rafael
- Novato
- Mill Valley
- San Anselmo
- Tamalpais-Homestead Valley
- Corte Madera
- Tiburon
- Fairfax
- Kentfield
- Sausalito
- Lucas Valley-Marinwood
Questions
- What is the area code for Larkspur, CA?
- Larkspur uses 2 area codes: 415 and 628. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
- What time zone is Larkspur in?
- Larkspur is in the Pacific time zone.