Prefix overview
Phone numbers in prefix 858-523
This page covers the 858-523 prefix in the United States. It shows where numbers come from, which carrier is linked to the range, and how this block is structured.
If you are looking for a specific number, you can continue to its dedicated phone page. Otherwise, this page helps you understand the broader number block behind it.
PREFIX
858-523
RATE CENTER
DEL MAR
CARRIER
PACIFIC BELL
CA
Prefix range
The prefix 858-523 includes numbers from 8585230000 to 8585239999.
This range is associated with the DEL MAR rate center and was originally assigned to PACIFIC BELL.
Numbers in this prefix
20 numbers