Phone Prefix
(408) 991-XXXX
CA • SUNNYVALE
Search Number in This Prefix
Enter the last 4 digits to search for a specific number
Carrier Information
NANPA
State
CA
Region
WC
Rate Center
SUNNYVALE
Assigned To
PACIFIC BELL
OCN
9740
Status
RT
Number Range
First Number
(408) 991-0000
Last Number
(408) 991-9999
This prefix contains 10,000 possible phone numbers
Spam Reports
8 reports
8
Total FCC + FTC DNC complaints for numbers in this prefix
Top 7 Most Reported Numbers
| # | Phone Number | Reports |
|---|---|---|
| 1 | (408) 991-5717 4089915717 | 2 |
| 2 | (408) 991-0189 4089910189 | 1 |
| 3 | (408) 991-0376 4089910376 | 1 |
| 4 | (408) 991-0120 4089910120 | 1 |
| 5 | (408) 991-3330 4089913330 | 1 |
| 6 | (408) 991-4480 4089914480 | 1 |
| 7 | (408) 991-0845 4089910845 | 1 |
About This Prefix
Phone numbers starting with (408) 991 are part of the North American Numbering Plan (NANP). The first three digits (408) represent the Area Code (NPA), and the next three digits (991) represent the Central Office Code (NXX) or exchange.
- NPA (408) - Numbering Plan Area, identifies the geographic region
- NXX (991) - Central Office Code, identifies the specific exchange
- XXXX - Subscriber number (0000-9999)