Prefix overview
Phone numbers in prefix 858-500
This page covers the 858-500 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
858-500
RATE CENTER
LA JOLLA
CARRIER
ONVOY, LLC - CA
CA
Prefix range
The prefix 858-500 includes numbers from 8585000000 to 8585009999.
This range is associated with the LA JOLLA rate center and was originally assigned to ONVOY, LLC - CA.
Numbers in this prefix
20 numbers