Phone Prefix
(312) 257-XXXX
IL • CHICGOZN01
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Carrier Information
NANPA
State
IL
Region
MW
Rate Center
CHICGOZN01
Assigned To
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
OCN
6333
Status
AS
Date Assigned
Aug 22, 2011
Number Range
First Number
(312) 257-0000
Last Number
(312) 257-9999
This prefix contains 10,000 possible phone numbers
Spam Reports
26 reports
26
Total FCC + FTC DNC complaints for numbers in this prefix
Top 23 Most Reported Numbers
| # | Phone Number | Reports |
|---|---|---|
| 1 | (312) 257-2478 3122572478 | 2 |
| 2 | (312) 257-1202 3122571202 | 2 |
| 3 | (312) 257-0649 3122570649 | 2 |
| 4 | (312) 257-2406 3122572406 | 1 |
| 5 | (312) 257-2438 3122572438 | 1 |
| 6 | (312) 257-2485 3122572485 | 1 |
| 7 | (312) 257-2491 3122572491 | 1 |
| 8 | (312) 257-2524 3122572524 | 1 |
| 9 | (312) 257-2548 3122572548 | 1 |
| 10 | (312) 257-2813 3122572813 | 1 |
| 11 | (312) 257-2815 3122572815 | 1 |
| 12 | (312) 257-2924 3122572924 | 1 |
| 13 | (312) 257-3012 3122573012 | 1 |
| 14 | (312) 257-3259 3122573259 | 1 |
| 15 | (312) 257-3302 3122573302 | 1 |
| 16 | (312) 257-3519 3122573519 | 1 |
| 17 | (312) 257-3860 3122573860 | 1 |
| 18 | (312) 257-3873 3122573873 | 1 |
| 19 | (312) 257-4842 3122574842 | 1 |
| 20 | (312) 257-8552 3122578552 | 1 |
| 21 | (312) 257-9463 3122579463 | 1 |
| 22 | (312) 257-2065 3122572065 | 1 |
| 23 | (312) 257-2378 3122572378 | 1 |
About This Prefix
Phone numbers starting with (312) 257 are part of the North American Numbering Plan (NANP). The first three digits (312) represent the Area Code (NPA), and the next three digits (257) represent the Central Office Code (NXX) or exchange.
- NPA (312) - Numbering Plan Area, identifies the geographic region
- NXX (257) - Central Office Code, identifies the specific exchange
- XXXX - Subscriber number (0000-9999)