Prefix overview
Phone numbers in prefix 830-521
This page covers the 830-521 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
830-521
RATE CENTER
CASTROVL
CARRIER
MATRIX TELECOM, LLC. S/I/I TNCI - TX
TX
Prefix range
The prefix 830-521 includes numbers from 8305210000 to 8305219999.
This range is associated with the CASTROVL rate center and was originally assigned to MATRIX TELECOM, LLC. S/I/I TNCI - TX.
Numbers in this prefix
20 numbers