Area code 858

Largest exchanges

• La Jolla166
• Sndg Lvta80
• Sndg Mrms69
• Poway45
• Del Mar45
• Rnchobrndo41
• Sndg Sndg23
• Rnchopnqts22
• Chulavista18
• Rnchosanfe14

Largest carriers

• Pacific Bell151
• New Cingular Wireless Pcs, LLC50
• T-mobile Usa, Inc.44
• Fractel, LLC35
• Onvoy, LLC - CA34
• Mcimetro Access Transmission Services LLC - CA32
• Cellco Partnership dba Verizon Wireless - CA31
• Teleport Communications America, LLC - CA26
• U.s. Telepacific Corp. dba Tpx Communications24
• Level 3 Telecom Of California, LP - CA20

Most reported 858 numbers

No visitor reports yet in this area code.

FCC complaints

• 858-256-17631 · 2026-10-07
• 858-286-29761 · 2026-10-07
• 858-943-64731 · 2026-10-05
• 858-724-71951 · 2026-10-03