Prefix overview
Phone numbers in prefix 301-323
This page covers the 301-323 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
301-323
RATE CENTER
LAUREL236
CARRIER
LEVEL 3 TELECOM OF MARYLAND, LLC - MD
MD
Prefix range
The prefix 301-323 includes numbers from 3013230000 to 3013239999.
This range is associated with the LAUREL236 rate center and was originally assigned to LEVEL 3 TELECOM OF MARYLAND, LLC - MD.
Numbers in this prefix
20 numbers