Prefix overview
Phone numbers in prefix 870-354
This page covers the 870-354 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
870-354
RATE CENTER
UMPIRE
CARRIER
ONVOY SPECTRUM, LLC
AR
Prefix range
The prefix 870-354 includes numbers from 8703540000 to 8703549999.
This range is associated with the UMPIRE rate center and was originally assigned to ONVOY SPECTRUM, LLC.
Numbers in this prefix
20 numbers