Phone Prefix
(312) 204-XXXX
IL • CHICGOZN01
Search Number in This Prefix
Enter the last 4 digits to search for a specific number
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) 204-0000
Last Number
(312) 204-9999
This prefix contains 10,000 possible phone numbers
Spam Reports
22 reports
22
Total FCC + FTC DNC complaints for numbers in this prefix
Top 22 Most Reported Numbers
| # | Phone Number | Reports |
|---|---|---|
| 1 | (312) 204-1638 3122041638 | 1 |
| 2 | (312) 204-1659 3122041659 | 1 |
| 3 | (312) 204-1675 3122041675 | 1 |
| 4 | (312) 204-1736 3122041736 | 1 |
| 5 | (312) 204-1958 3122041958 | 1 |
| 6 | (312) 204-2205 3122042205 | 1 |
| 7 | (312) 204-2358 3122042358 | 1 |
| 8 | (312) 204-2445 3122042445 | 1 |
| 9 | (312) 204-3725 3122043725 | 1 |
| 10 | (312) 204-5504 3122045504 | 1 |
| 11 | (312) 204-5809 3122045809 | 1 |
| 12 | (312) 204-5971 3122045971 | 1 |
| 13 | (312) 204-6190 3122046190 | 1 |
| 14 | (312) 204-8131 3122048131 | 1 |
| 15 | (312) 204-8225 3122048225 | 1 |
| 16 | (312) 204-8362 3122048362 | 1 |
| 17 | (312) 204-8434 3122048434 | 1 |
| 18 | (312) 204-8449 3122048449 | 1 |
| 19 | (312) 204-8617 3122048617 | 1 |
| 20 | (312) 204-9256 3122049256 | 1 |
| 21 | (312) 204-9268 3122049268 | 1 |
| 22 | (312) 204-9337 3122049337 | 1 |
About This Prefix
Phone numbers starting with (312) 204 are part of the North American Numbering Plan (NANP). The first three digits (312) represent the Area Code (NPA), and the next three digits (204) represent the Central Office Code (NXX) or exchange.
- NPA (312) - Numbering Plan Area, identifies the geographic region
- NXX (204) - Central Office Code, identifies the specific exchange
- XXXX - Subscriber number (0000-9999)