Prefix overview
Phone numbers in prefix 551-866
This page covers the 551-866 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
551-866
RATE CENTER
CLIFFSIDE
CARRIER
TON80 COMMUNICATIONS, LLC
NJ
Prefix range
The prefix 551-866 includes numbers from 5518660000 to 5518669999.
This range is associated with the CLIFFSIDE rate center and was originally assigned to TON80 COMMUNICATIONS, LLC.
Numbers in this prefix
20 numbers