Prefix overview
Phone numbers in prefix 858-257
This page covers the 858-257 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
858-257
RATE CENTER
LA JOLLA
CARRIER
LEVEL 3 COMMUNICATIONS, LLC - CA
CA
Prefix range
The prefix 858-257 includes numbers from 8582570000 to 8582579999.
This range is associated with the LA JOLLA rate center and was originally assigned to LEVEL 3 COMMUNICATIONS, LLC - CA.
Numbers in this prefix
20 numbers