Phone Prefix
(303) 856-XXXX
CO • DENVER
Search Number in This Prefix
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Carrier Information
NANPA
State
CO
Region
WE
Rate Center
DENVER
Assigned To
LEVEL 3 COMMUNICATIONS, LLC - CO
OCN
6118
Status
RT
Number Range
First Number
(303) 856-0000
Last Number
(303) 856-9999
This prefix contains 10,000 possible phone numbers
Spam Reports
40 reports
40
Total FCC + FTC DNC complaints for numbers in this prefix
Top 34 Most Reported Numbers
| # | Phone Number | Reports |
|---|---|---|
| 1 | (303) 856-9326 3038569326 | 3 |
| 2 | (303) 856-9360 3038569360 | 2 |
| 3 | (303) 856-9911 3038569911 | 2 |
| 4 | (303) 856-3585 3038563585 | 2 |
| 5 | (303) 856-9327 3038569327 | 2 |
| 6 | (303) 856-2796 3038562796 | 1 |
| 7 | (303) 856-2873 3038562873 | 1 |
| 8 | (303) 856-3652 3038563652 | 1 |
| 9 | (303) 856-5535 3038565535 | 1 |
| 10 | (303) 856-7522 3038567522 | 1 |
| 11 | (303) 856-7864 3038567864 | 1 |
| 12 | (303) 856-9000 3038569000 | 1 |
| 13 | (303) 856-9238 3038569238 | 1 |
| 14 | (303) 856-9266 3038569266 | 1 |
| 15 | (303) 856-9282 3038569282 | 1 |
| 16 | (303) 856-9328 3038569328 | 1 |
| 17 | (303) 856-9335 3038569335 | 1 |
| 18 | (303) 856-9346 3038569346 | 1 |
| 19 | (303) 856-9425 3038569425 | 1 |
| 20 | (303) 856-9434 3038569434 | 1 |
| 21 | (303) 856-9501 3038569501 | 1 |
| 22 | (303) 856-9603 3038569603 | 1 |
| 23 | (303) 856-9614 3038569614 | 1 |
| 24 | (303) 856-9616 3038569616 | 1 |
| 25 | (303) 856-9717 3038569717 | 1 |
| 26 | (303) 856-9901 3038569901 | 1 |
| 27 | (303) 856-9935 3038569935 | 1 |
| 28 | (303) 856-9939 3038569939 | 1 |
| 29 | (303) 856-0511 3038560511 | 1 |
| 30 | (303) 856-9955 3038569955 | 1 |
| 31 | (303) 856-0934 3038560934 | 1 |
| 32 | (303) 856-1413 3038561413 | 1 |
| 33 | (303) 856-2172 3038562172 | 1 |
| 34 | (303) 856-2489 3038562489 | 1 |
About This Prefix
Phone numbers starting with (303) 856 are part of the North American Numbering Plan (NANP). The first three digits (303) represent the Area Code (NPA), and the next three digits (856) represent the Central Office Code (NXX) or exchange.
- NPA (303) - Numbering Plan Area, identifies the geographic region
- NXX (856) - Central Office Code, identifies the specific exchange
- XXXX - Subscriber number (0000-9999)