Phone Prefix
(312) 721-XXXX
IL • CHICGOZN01
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Carrier Information
NANPA
State
IL
Region
MW
Rate Center
CHICGOZN01
Assigned To
T-MOBILE USA, INC.
OCN
6529
Status
AS
Date Assigned
Oct 25, 2013
Number Range
First Number
(312) 721-0000
Last Number
(312) 721-9999
This prefix contains 10,000 possible phone numbers
Spam Reports
6 reports
6
Total FCC + FTC DNC complaints for numbers in this prefix
Top 5 Most Reported Numbers
| # | Phone Number | Reports |
|---|---|---|
| 1 | (312) 721-9462 3127219462 | 2 |
| 2 | (312) 721-3002 3127213002 | 1 |
| 3 | (312) 721-3328 3127213328 | 1 |
| 4 | (312) 721-6994 3127216994 | 1 |
| 5 | (312) 721-9992 3127219992 | 1 |
About This Prefix
Phone numbers starting with (312) 721 are part of the North American Numbering Plan (NANP). The first three digits (312) represent the Area Code (NPA), and the next three digits (721) represent the Central Office Code (NXX) or exchange.
- NPA (312) - Numbering Plan Area, identifies the geographic region
- NXX (721) - Central Office Code, identifies the specific exchange
- XXXX - Subscriber number (0000-9999)