Phone Prefix
(423) 557-XXXX
TN • JOHNSON CY
Search Number in This Prefix
Enter the last 4 digits to search for a specific number
Carrier Information
NANPA
State
TN
Region
SE
Rate Center
JOHNSON CY
Assigned To
SUNCOM DBA T-MOBILE USA
OCN
8645
Status
AS
Date Assigned
Feb 02, 2006
Number Range
First Number
(423) 557-0000
Last Number
(423) 557-9999
This prefix contains 10,000 possible phone numbers
Spam Reports
13 reports
13
Total FCC + FTC DNC complaints for numbers in this prefix
Top 7 Most Reported Numbers
| # | Phone Number | Reports |
|---|---|---|
| 1 | (423) 557-4590 4235574590 | 7 |
| 2 | (423) 557-0924 4235570924 | 1 |
| 3 | (423) 557-3010 4235573010 | 1 |
| 4 | (423) 557-0855 4235570855 | 1 |
| 5 | (423) 557-7454 4235577454 | 1 |
| 6 | (423) 557-9918 4235579918 | 1 |
| 7 | (423) 557-9929 4235579929 | 1 |
About This Prefix
Phone numbers starting with (423) 557 are part of the North American Numbering Plan (NANP). The first three digits (423) represent the Area Code (NPA), and the next three digits (557) represent the Central Office Code (NXX) or exchange.
- NPA (423) - Numbering Plan Area, identifies the geographic region
- NXX (557) - Central Office Code, identifies the specific exchange
- XXXX - Subscriber number (0000-9999)