Prefix overview
Phone numbers in prefix 504-403
This page covers the 504-403 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
504-403
RATE CENTER
KENNER
CARRIER
SPOK, INC.
LA
Prefix range
The prefix 504-403 includes numbers from 5044030000 to 5044039999.
This range is associated with the KENNER rate center and was originally assigned to SPOK, INC..
Numbers in this prefix
20 numbers