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| Raw Number | 331600 |
| Basic Format | 331-600 |
| NPA (Area Code) | 331 |
| NXX | 600 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | State | Region | Block Effective Date |
|---|---|---|---|---|---|---|---|---|
| 331-600-0XXX | 965H | FRACTEL, LLC | WHEATON | AS | 08/09/2019 | IL | MW | 10/02/2019 |
| 331-600-1XXX | 495J | STRATUS NETWORKS | WHEATON | AS | 08/31/2020 | IL | MW | 09/26/2020 |
| 331-600-2XXX | 6529 | T-MOBILE USA, INC. | WHEATON | AS | 08/30/2022 | IL | MW | 09/25/2022 |
| 331-600-3XXX | 624H | ONVOY SPECTRUM, LLC | WHEATON | AS | 04/18/2025 | IL | MW | 05/12/2025 |
| 331-600-4XXX | 6529 | T-MOBILE USA, INC. | WHEATON | AS | 04/26/2022 | IL | MW | 05/26/2022 |
| 331-600-5XXX | 6529 | T-MOBILE USA, INC. | WHEATON | AS | 04/26/2022 | IL | MW | 05/26/2022 |
| 331-600-6XXX | 965H | FRACTEL, LLC | WHEATON | AS | 08/09/2019 | IL | MW | 10/02/2019 |
| 331-600-7XXX | 6529 | T-MOBILE USA, INC. | WHEATON | AS | 08/30/2022 | IL | MW | 09/25/2022 |
| 331-600-8XXX | 073H | TELNYX LLC | WHEATON | AS | 01/30/2021 | IL | MW | 02/27/2021 |
| 331-600-9XXX | 063E | PEERLESS NETWORK OF ILLINOIS, LLC - IL | WHEATON | AS | 02/22/2021 | IL | MW | 03/22/2021 |
| 331-600-XXXX | 965H | FRACTEL, LLC | WHEATON | AS | 08/08/2019 | IL |
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