Prefix overview
Phone numbers in prefix 840-221
This page covers the 840-221 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
840-221
RATE CENTER
S BERNDINO
CARRIER
HD CARRIER LLC
CA
Prefix range
The prefix 840-221 includes numbers from 8402210000 to 8402219999.
This range is associated with the S BERNDINO rate center and was originally assigned to HD CARRIER LLC.
Numbers in this prefix
20 numbers