Prefix overview
Phone numbers in prefix 551-378
This page covers the 551-378 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
551-378
RATE CENTER
CLIFFSIDE
CARRIER
OMNIPOINT COMMUNICATIONS, INC. - NJ
NJ
Prefix range
The prefix 551-378 includes numbers from 5513780000 to 5513789999.
This range is associated with the CLIFFSIDE rate center and was originally assigned to OMNIPOINT COMMUNICATIONS, INC. - NJ.
Numbers in this prefix
20 numbers