Prefix overview
Phone numbers in prefix 240-321
This page covers the 240-321 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
240-321
RATE CENTER
OAKLAND
CARRIER
USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD
MD
Prefix range
The prefix 240-321 includes numbers from 2403210000 to 2403219999.
This range is associated with the OAKLAND rate center and was originally assigned to USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD.
Numbers in this prefix
20 numbers