Prefix overview
Phone numbers in prefix 631-380
This page covers the 631-380 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
631-380
RATE CENTER
STONYBROOK
CARRIER
TC SYSTEMS, INC. - NY
NY
Prefix range
The prefix 631-380 includes numbers from 6313800000 to 6313809999.
This range is associated with the STONYBROOK rate center and was originally assigned to TC SYSTEMS, INC. - NY.
Numbers in this prefix
20 numbers