LEVEL 3 COMMUNICATIONS, LLC - IL
6 prefixes in 331 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 331-207 | YORKVILLE | 6115 | 2011-11-01 | Yes |
| 331-208 | AURORA | 6115 | 2011-11-08 | Yes |
| 331-209 | ELMHURST | 6115 | 2012-01-17 | Yes |
| 331-264 | HINSDALE | 6115 | 2020-03-06 | Yes |
| 331-401 | NAPERVILLE | 6115 | 2015-12-14 | Yes |
| 331-422 | ST CHARLES | 6115 | 2008-11-13 | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.