Phone Prefix
(312) 255-XXXX
IL • CHICGOZN01
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Carrier Information
NANPA
State
IL
Region
MW
Rate Center
CHICGOZN01
Assigned To
ILLINOIS BELL TEL CO
OCN
9329
Status
RT
Number Range
First Number
(312) 255-0000
Last Number
(312) 255-9999
This prefix contains 10,000 possible phone numbers
Spam Reports
13 reports
13
Total FCC + FTC DNC complaints for numbers in this prefix
Top 10 Most Reported Numbers
| # | Phone Number | Reports |
|---|---|---|
| 1 | (312) 255-5798 3122555798 | 3 |
| 2 | (312) 255-1010 3122551010 | 2 |
| 3 | (312) 255-2568 3122552568 | 1 |
| 4 | (312) 255-3402 3122553402 | 1 |
| 5 | (312) 255-6533 3122556533 | 1 |
| 6 | (312) 255-6688 3122556688 | 1 |
| 7 | (312) 255-7418 3122557418 | 1 |
| 8 | (312) 255-0555 3122550555 | 1 |
| 9 | (312) 255-8218 3122558218 | 1 |
| 10 | (312) 255-1257 3122551257 | 1 |
About This Prefix
Phone numbers starting with (312) 255 are part of the North American Numbering Plan (NANP). The first three digits (312) represent the Area Code (NPA), and the next three digits (255) represent the Central Office Code (NXX) or exchange.
- NPA (312) - Numbering Plan Area, identifies the geographic region
- NXX (255) - Central Office Code, identifies the specific exchange
- XXXX - Subscriber number (0000-9999)