Prefix overview
Phone numbers in prefix 858-303
This page covers the 858-303 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
858-303
RATE CENTER
LA JOLLA
CARRIER
COMCAST IP PHONE, LLC
CA
Prefix range
The prefix 858-303 includes numbers from 8583030000 to 8583039999.
This range is associated with the LA JOLLA rate center and was originally assigned to COMCAST IP PHONE, LLC.
Numbers in this prefix
20 numbers