Prefix overview
Phone numbers in prefix 301-203
This page covers the 301-203 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
301-203
RATE CENTER
WSHNGTNZN6
CARRIER
VERIZON MARYLAND, INC.
MD
Prefix range
The prefix 301-203 includes numbers from 3012030000 to 3012039999.
This range is associated with the WSHNGTNZN6 rate center and was originally assigned to VERIZON MARYLAND, INC..
Numbers in this prefix
20 numbers