Phone Prefix
(303) 257-XXXX
CO • DENVER
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Carrier Information
NANPA
State
CO
Region
WE
Rate Center
DENVER
Assigned To
T-MOBILE USA, INC.
OCN
6529
Status
RT
Number Range
First Number
(303) 257-0000
Last Number
(303) 257-9999
This prefix contains 10,000 possible phone numbers
Spam Reports
12 reports
12
Total FCC + FTC DNC complaints for numbers in this prefix
Top 11 Most Reported Numbers
| # | Phone Number | Reports |
|---|---|---|
| 1 | (303) 257-1332 3032571332 | 2 |
| 2 | (303) 257-1920 3032571920 | 1 |
| 3 | (303) 257-1963 3032571963 | 1 |
| 4 | (303) 257-3443 3032573443 | 1 |
| 5 | (303) 257-3669 3032573669 | 1 |
| 6 | (303) 257-4101 3032574101 | 1 |
| 7 | (303) 257-5156 3032575156 | 1 |
| 8 | (303) 257-5556 3032575556 | 1 |
| 9 | (303) 257-7089 3032577089 | 1 |
| 10 | (303) 257-7869 3032577869 | 1 |
| 11 | (303) 257-8827 3032578827 | 1 |
About This Prefix
Phone numbers starting with (303) 257 are part of the North American Numbering Plan (NANP). The first three digits (303) represent the Area Code (NPA), and the next three digits (257) represent the Central Office Code (NXX) or exchange.
- NPA (303) - Numbering Plan Area, identifies the geographic region
- NXX (257) - Central Office Code, identifies the specific exchange
- XXXX - Subscriber number (0000-9999)