Casa de Oro-Mount Helix, California

Nearest ZIP codes to Casa de Oro-Mount Helix

These are the ZIP codes nearest to Casa de Oro-Mount Helix, each listed with the post office it is named after.

Area codes for Casa de Oro-Mount Helix

• Area code 619

  In service since 1982. Shares its area with 858. Local calls are dialed with 1 plus ten digits.

• Area code 858

  In service since June 12, 1999. Shares its area with 619. 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

Casa de Oro-Mount Helix is in the Pacific Time zone.

Towns near Casa de Oro-Mount Helix

• Spring Valley3.6 km (2.2 mi)
• El Cajon4.3 km (2.7 mi)
• Rancho San Diego4.6 km (2.9 mi)
• La Mesa4.8 km (3.0 mi)
• Lemon Grove6.6 km (4.1 mi)
• Bostonia6.6 km (4.1 mi)
• La Presa6.6 km (4.1 mi)
• Granite Hills7.3 km (4.5 mi)