Prefix overview
Phone numbers in prefix 308-303
This page covers the 308-303 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
308-303
RATE CENTER
CAIRO
CARRIER
ONVOY, LLC - NE
NE
Prefix range
The prefix 308-303 includes numbers from 3083030000 to 3083039999.
This range is associated with the CAIRO rate center and was originally assigned to ONVOY, LLC - NE.
Numbers in this prefix
20 numbers