Prefix overview
Phone numbers in prefix 301-381
This page covers the 301-381 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
301-381
RATE CENTER
WSHNGTNZN2
CARRIER
ONVOY, LLC - MD
MD
Prefix range
The prefix 301-381 includes numbers from 3013810000 to 3013819999.
This range is associated with the WSHNGTNZN2 rate center and was originally assigned to ONVOY, LLC - MD.
Numbers in this prefix
20 numbers