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| Raw Number | 331837 |
| Basic Format | 331-837 |
| NPA (Area Code) | 331 |
| NXX | 837 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | State | Region | Block Effective Date | Block Available Date |
|---|---|---|---|---|---|---|---|---|---|
| 331-837-0XXX | 984E | BANDWIDTH.COM CLEC, LLC - IL | W CHICAGO | AS | 07/20/2022 | IL | MW | 08/19/2022 | |
| 331-837-1XXX | 984E | BANDWIDTH.COM CLEC, LLC - IL | W CHICAGO | AS | 07/20/2022 | IL | MW | 08/19/2022 | |
| 331-837-2XXX | 516J | TON80 COMMUNICATIONS, LLC | W CHICAGO | AF | IL | MW | 05/05/2026 | ||
| 331-837-3XXX | 516J | TON80 COMMUNICATIONS, LLC | W CHICAGO | AF | IL | MW | 05/05/2026 | ||
| 331-837-4XXX | 516J | TON80 COMMUNICATIONS, LLC | W CHICAGO | AS | 01/07/2022 | IL | MW | 03/10/2022 | |
| 331-837-5XXX | 224C | ONVOY, LLC | W CHICAGO | AS | 03/13/2025 | IL | MW | 04/06/2025 | |
| 331-837-6XXX | 321J | HD CARRIER LLC | W CHICAGO | AS | 09/12/2025 | IL | MW | 10/10/2025 | |
| 331-837-7XXX | 224C | ONVOY, LLC | W CHICAGO | AS | 01/31/2024 | IL | MW | 03/01/2024 | |
| 331-837-8XXX | 224C | ONVOY, LLC | W CHICAGO | AS | 06/23/2023 | IL | MW | 07/22/2023 | |
| 331-837-9XXX | 224C | ONVOY, LLC | W CHICAGO | AS | 01/31/2024 | IL | MW | 03/01/2024 | |
| 331-837-XXXX | 516J | TON80 COMMUNICATIONS, LLC | W CHICAGO | AS | 01/07/2022 | IL |
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