Prefix overview
Phone numbers in prefix 423-378
This page covers the 423-378 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
423-378
RATE CENTER
KINGSPORT
CARRIER
UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN
TN
Prefix range
The prefix 423-378 includes numbers from 4233780000 to 4233789999.
This range is associated with the KINGSPORT rate center and was originally assigned to UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN.
Numbers in this prefix
20 numbers