Prefix overview
Phone numbers in prefix 858-490
This page covers the 858-490 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
858-490
RATE CENTER
LA JOLLA
CARRIER
PACIFIC BELL
CA
Prefix range
The prefix 858-490 includes numbers from 8584900000 to 8584909999.
This range is associated with the LA JOLLA rate center and was originally assigned to PACIFIC BELL.
Numbers in this prefix
20 numbers