TELEPORT COMMUNICATIONS AMERICA, LLC - IL
22 prefixes in 312 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 312-242 | CHICGOZN01 | 7136 | — | Yes |
| 312-383 | CHICGOZN01 | 7136 | 2016-02-01 | Yes |
| 312-395 | CHICGOZN01 | 7136 | — | Yes |
| 312-479 | CHICGOZN01 | 7136 | — | Yes |
| 312-503 | CHICGOZN01 | 7136 | — | Yes |
| 312-521 | CHICGOZN01 | 7136 | — | Yes |
| 312-549 | CHICGOZN01 | 7136 | 2015-09-25 | Yes |
| 312-596 | CHICGOZN01 | 7136 | — | — |
| 312-660 | CHICGOZN01 | 7136 | — | — |
| 312-665 | CHICGOZN01 | 7136 | — | — |
| 312-705 | CHICGOZN01 | 7136 | — | — |
| 312-706 | CHICGOZN01 | 7136 | — | — |
| 312-734 | CHICGOZN01 | 7136 | 2015-09-17 | Yes |
| 312-736 | CHICGOZN01 | 7136 | 2017-10-20 | Yes |
| 312-764 | CHICGOZN01 | 7136 | 2016-10-20 | Yes |
| 312-768 | CHICGOZN01 | 7136 | — | Yes |
| 312-777 | CHICGOZN01 | 7136 | — | Yes |
| 312-843 | CHICGOZN01 | 7136 | 2014-03-12 | Yes |
| 312-889 | CHICGOZN01 | 7136 | 2015-06-25 | Yes |
| 312-892 | CHICGOZN01 | 7136 | — | Yes |
| 312-980 | CHICGOZN01 | 7136 | — | — |
| 312-995 | CHICGOZN01 | 7136 | 2014-08-12 | 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.