Prefix overview
Phone numbers in prefix 315-221
This page covers the 315-221 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
315-221
RATE CENTER
WATERTOWN
CARRIER
TC SYSTEMS, INC. - NY
NY
Prefix range
The prefix 315-221 includes numbers from 3152210000 to 3152219999.
This range is associated with the WATERTOWN rate center and was originally assigned to TC SYSTEMS, INC. - NY.
Numbers in this prefix
20 numbers