Phone Prefix
(628) 257-XXXX
CA • MILLVALLEY
Search Number in This Prefix
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Carrier Information
NANPA
State
CA
Region
WC
Rate Center
MILLVALLEY
Assigned To
RACE TELECOMMUNICATIONS, INC. - CA
OCN
973E
Status
AS
Date Assigned
Oct 28, 2016
Number Range
First Number
(628) 257-0000
Last Number
(628) 257-9999
This prefix contains 10,000 possible phone numbers
Spam Reports
33 reports
33
Total FCC + FTC DNC complaints for numbers in this prefix
Top 30 Most Reported Numbers
| # | Phone Number | Reports |
|---|---|---|
| 1 | (628) 257-5963 6282575963 | 2 |
| 2 | (628) 257-9137 6282579137 | 2 |
| 3 | (628) 257-1882 6282571882 | 2 |
| 4 | (628) 257-1385 6282571385 | 1 |
| 5 | (628) 257-1554 6282571554 | 1 |
| 6 | (628) 257-2088 6282572088 | 1 |
| 7 | (628) 257-2487 6282572487 | 1 |
| 8 | (628) 257-2591 6282572591 | 1 |
| 9 | (628) 257-2684 6282572684 | 1 |
| 10 | (628) 257-2720 6282572720 | 1 |
| 11 | (628) 257-3052 6282573052 | 1 |
| 12 | (628) 257-3287 6282573287 | 1 |
| 13 | (628) 257-3438 6282573438 | 1 |
| 14 | (628) 257-3576 6282573576 | 1 |
| 15 | (628) 257-3634 6282573634 | 1 |
| 16 | (628) 257-3958 6282573958 | 1 |
| 17 | (628) 257-5077 6282575077 | 1 |
| 18 | (628) 257-5108 6282575108 | 1 |
| 19 | (628) 257-5505 6282575505 | 1 |
| 20 | (628) 257-5807 6282575807 | 1 |
| 21 | (628) 257-6437 6282576437 | 1 |
| 22 | (628) 257-7096 6282577096 | 1 |
| 23 | (628) 257-7171 6282577171 | 1 |
| 24 | (628) 257-8075 6282578075 | 1 |
| 25 | (628) 257-8279 6282578279 | 1 |
| 26 | (628) 257-8499 6282578499 | 1 |
| 27 | (628) 257-0748 6282570748 | 1 |
| 28 | (628) 257-9620 6282579620 | 1 |
| 29 | (628) 257-1134 6282571134 | 1 |
| 30 | (628) 257-1140 6282571140 | 1 |
About This Prefix
Phone numbers starting with (628) 257 are part of the North American Numbering Plan (NANP). The first three digits (628) represent the Area Code (NPA), and the next three digits (257) represent the Central Office Code (NXX) or exchange.
- NPA (628) - Numbering Plan Area, identifies the geographic region
- NXX (257) - Central Office Code, identifies the specific exchange
- XXXX - Subscriber number (0000-9999)