Prefix overview
Phone numbers in prefix 628-577
This page covers the 628-577 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
628-577
RATE CENTER
NICASIO
CARRIER
FRACTEL, LLC
CA
Prefix range
The prefix 628-577 includes numbers from 6285770000 to 6285779999.
This range is associated with the NICASIO rate center and was originally assigned to FRACTEL, LLC.
Numbers in this prefix
20 numbers