Prefix overview
Phone numbers in prefix 645-678
This page covers the 645-678 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
645-678
RATE CENTER
KEYS
CARRIER
ONVOY SPECTRUM, LLC
FL
Prefix range
The prefix 645-678 includes numbers from 6456780000 to 6456789999.
This range is associated with the KEYS rate center and was originally assigned to ONVOY SPECTRUM, LLC.
Numbers in this prefix
20 numbers