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Mill Valley, CA Area Codes
Mill Valley, California (population 13,799) uses area codes 415 and 628.
Carriers with Mill Valley numbers
23 prefixes are assigned to the Mill Valley exchange: 0% mobile, 43% VoIP and cable, 57% landline.
| Carrier | Prefixes |
|---|---|
| AT&T (Pacific Bell) | 6 |
| Bandwidth | 3 |
| Fractel | 3 |
| Verizon Business (MCImetro) | 2 |
| Onvoy (Sinch) | 2 |
| Metropcs | 2 |
| Tpx Communications | 1 |
| Comcast (Xfinity) | 1 |
Area codes used in Mill Valley
| Area code | Prefixes serving Mill Valley | Main carriers in this code |
|---|---|---|
| 415 | 16 | AT&T (Pacific Bell), AT&T Mobility, Verizon Wireless |
| 628 | 7 | Onvoy (Sinch), Fractel, T-Mobile |
Mill Valley phone number prefixes
Numbers starting with these first six digits were originally assigned to the Mill Valley exchange.
415-322Bandwidth415-326Bandwidth415-360Verizon Business (MCImetro)415-380AT&T (Pacific Bell)415-381AT&T (Pacific Bell)415-383AT&T (Pacific Bell)415-384AT&T (Pacific Bell)415-388AT&T (Pacific Bell)415-389AT&T (Pacific Bell)415-569Tpx Communications415-634Onvoy (Sinch)415-843Verizon Business (MCImetro)415-877Metropcs415-879Metropcs415-888Comcast (Xfinity)415-968Lumen (Level 3)628-215Bandwidth628-245Onvoy (Sinch)628-257Race Telecommunications628-288Fractel628-291Voip Innovations628-477Fractel628-677Fractel
Nearby cities in area code 415
- San Francisco
- San Rafael
- Novato
- Larkspur
- San Anselmo
- Tamalpais-Homestead Valley
- Corte Madera
- Tiburon
- Fairfax
- Kentfield
- Sausalito
- Lucas Valley-Marinwood
Questions
- What is the area code for Mill Valley, CA?
- Mill Valley 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 Mill Valley in?
- Mill Valley is in the Pacific time zone.