Prefix overview
Phone numbers in prefix 858-340
This page covers the 858-340 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
858-340
RATE CENTER
LA JOLLA
CARRIER
NEW CINGULAR WIRELESS PCS, LLC
CA
Prefix range
The prefix 858-340 includes numbers from 8583400000 to 8583409999.
This range is associated with the LA JOLLA rate center and was originally assigned to NEW CINGULAR WIRELESS PCS, LLC.
Numbers in this prefix
20 numbers