Phone Prefix
(303) 557-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) 557-0000
Last Number
(303) 557-9999
This prefix contains 10,000 possible phone numbers
Spam Reports
84 reports
84
Total FCC + FTC DNC complaints for numbers in this prefix
Top 37 Most Reported Numbers
| # | Phone Number | Reports |
|---|---|---|
| 1 | (303) 557-6022 3035576022 | 15 |
| 2 | (303) 557-7731 3035577731 | 11 |
| 3 | (303) 557-2591 3035572591 | 7 |
| 4 | (303) 557-4857 3035574857 | 7 |
| 5 | (303) 557-8990 3035578990 | 6 |
| 6 | (303) 557-1834 3035571834 | 4 |
| 7 | (303) 557-4214 3035574214 | 3 |
| 8 | (303) 557-4270 3035574270 | 2 |
| 9 | (303) 557-3651 3035573651 | 1 |
| 10 | (303) 557-4209 3035574209 | 1 |
| 11 | (303) 557-4210 3035574210 | 1 |
| 12 | (303) 557-4265 3035574265 | 1 |
| 13 | (303) 557-4291 3035574291 | 1 |
| 14 | (303) 557-4542 3035574542 | 1 |
| 15 | (303) 557-4578 3035574578 | 1 |
| 16 | (303) 557-5145 3035575145 | 1 |
| 17 | (303) 557-5855 3035575855 | 1 |
| 18 | (303) 557-5989 3035575989 | 1 |
| 19 | (303) 557-5996 3035575996 | 1 |
| 20 | (303) 557-6154 3035576154 | 1 |
| 21 | (303) 557-6586 3035576586 | 1 |
| 22 | (303) 557-6880 3035576880 | 1 |
| 23 | (303) 557-7702 3035577702 | 1 |
| 24 | (303) 557-7762 3035577762 | 1 |
| 25 | (303) 557-8114 3035578114 | 1 |
| 26 | (303) 557-8910 3035578910 | 1 |
| 27 | (303) 557-9256 3035579256 | 1 |
| 28 | (303) 557-9313 3035579313 | 1 |
| 29 | (303) 557-0398 3035570398 | 1 |
| 30 | (303) 557-9611 3035579611 | 1 |
| 31 | (303) 557-0563 3035570563 | 1 |
| 32 | (303) 557-0845 3035570845 | 1 |
| 33 | (303) 557-1213 3035571213 | 1 |
| 34 | (303) 557-1381 3035571381 | 1 |
| 35 | (303) 557-2660 3035572660 | 1 |
| 36 | (303) 557-3165 3035573165 | 1 |
| 37 | (303) 557-3544 3035573544 | 1 |
About This Prefix
Phone numbers starting with (303) 557 are part of the North American Numbering Plan (NANP). The first three digits (303) represent the Area Code (NPA), and the next three digits (557) represent the Central Office Code (NXX) or exchange.
- NPA (303) - Numbering Plan Area, identifies the geographic region
- NXX (557) - Central Office Code, identifies the specific exchange
- XXXX - Subscriber number (0000-9999)