Prefix overview
Phone numbers in prefix 318-203
This page covers the 318-203 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
318-203
RATE CENTER
SHREVEPORT
CARRIER
ONVOY SPECTRUM, LLC
LA
Prefix range
The prefix 318-203 includes numbers from 3182030000 to 3182039999.
This range is associated with the SHREVEPORT rate center and was originally assigned to ONVOY SPECTRUM, LLC.
Numbers in this prefix
20 numbers