LEVEL 3 COMMUNICATIONS, LLC - IL
33 prefixes in 312 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 312-224 | CHICGOZN01 | 6115 | — | — |
| 312-238 | CHICGOZN01 | 6115 | — | Yes |
| 312-261 | CHICGOZN01 | 6115 | — | Yes |
| 312-264 | CHICGOZN01 | 6115 | — | — |
| 312-268 | CHICGOZN01 | 6115 | — | Yes |
| 312-278 | CHICGOZN01 | 6115 | — | Yes |
| 312-281 | CHICGOZN01 | 6115 | — | Yes |
| 312-283 | CHICGOZN01 | 6115 | — | Yes |
| 312-300 | CHICGOZN01 | 6115 | — | Yes |
| 312-324 | CHICGOZN01 | 6115 | 2001-05-03 | Yes |
| 312-373 | CHICGOZN01 | 6115 | — | Yes |
| 312-423 | CHICGOZN01 | 6115 | — | Yes |
| 312-428 | CHICGOZN01 | 6115 | — | Yes |
| 312-429 | CHICGOZN01 | 6115 | — | Yes |
| 312-477 | CHICGOZN01 | 6115 | 2010-10-20 | Yes |
| 312-488 | CHICGOZN01 | 6115 | — | Yes |
| 312-546 | CHICGOZN01 | 6115 | — | Yes |
| 312-548 | CHICGOZN01 | 6115 | 2007-09-05 | Yes |
| 312-602 | CHICGOZN01 | 6115 | — | — |
| 312-625 | CHICGOZN01 | 6115 | 2001-11-12 | Yes |
| 312-635 | CHICGOZN01 | 6115 | — | Yes |
| 312-637 | CHICGOZN01 | 6115 | — | Yes |
| 312-638 | CHICGOZN01 | 6115 | — | Yes |
| 312-646 | CHICGOZN01 | 6115 | — | Yes |
| 312-690 | CHICGOZN01 | 6115 | 2014-05-06 | Yes |
| 312-698 | CHICGOZN01 | 6115 | 2001-08-23 | Yes |
| 312-752 | CHICGOZN01 | 6115 | 2002-04-19 | Yes |
| 312-858 | CHICGOZN01 | 6115 | 2015-12-21 | Yes |
| 312-872 | CHICGOZN01 | 6115 | 2018-07-12 | Yes |
| 312-893 | CHICGOZN01 | 6115 | — | Yes |
| 312-895 | CHICGOZN01 | 6115 | — | — |
| 312-896 | CHICGOZN01 | 6115 | — | — |
| 312-962 | CHICGOZN01 | 6115 | — | 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.