Alto, California

Nearest ZIP codes to Alto

These are the ZIP codes nearest to Alto, each listed with the post office it is named after.

Area codes for Alto

• Area code 415

  In service since 1947. Shares its area with 628. Local calls are dialed with 1 plus ten digits.

• Area code 628

  In service since March 21, 2015. Shares its area with 415. Local calls are dialed with 1 plus ten digits.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Time zone

Alto is in the Pacific Time zone.

Towns near Alto

• Mill Valley1.9 km (1.2 mi)
• Corte Madera2 km (1.2 mi)
• Tamalpais-Homestead Valley3.4 km (2.1 mi)
• Larkspur3.6 km (2.2 mi)
• Marin3.9 km (2.4 mi)
• Greenbrae5 km (3.1 mi)
• San Quentin5 km (3.1 mi)
• Tiburon5.3 km (3.3 mi)