Prefix overview
Phone numbers in prefix 631-251
This page covers the 631-251 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
631-251
RATE CENTER
SAG HARBOR
CARRIER
LEVEL 3 COMMUNICATIONS, LLC - NY
NY
Prefix range
The prefix 631-251 includes numbers from 6312510000 to 6312519999.
This range is associated with the SAG HARBOR rate center and was originally assigned to LEVEL 3 COMMUNICATIONS, LLC - NY.
Numbers in this prefix
20 numbers