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| Raw Number | 406668 |
| Basic Format | 406-668 |
| NPA (Area Code) | 406 |
| NXX | 668 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | State | Region | Block Effective Date |
|---|---|---|---|---|---|---|---|---|
| 406-668-0XXX | 9415 | LEVEL 3 COMMUNICATIONS, LLC - MT | FROMBERG | AS | 10/15/2004 | MT | WE | 11/13/2004 |
| 406-668-1XXX | 994E | BANDWIDTH.COM CLEC, LLC - MT | FROMBERG | AS | 01/13/2009 | MT | WE | 02/13/2009 |
| 406-668-2XXX | 935G | TRI TEL, INC. - MT | FROMBERG | AS | 12/18/2012 | MT | WE | 01/28/2013 |
| 406-668-3XXX | 994E | BANDWIDTH.COM CLEC, LLC - MT | FROMBERG | AS | 05/06/2015 | MT | WE | 05/31/2015 |
| 406-668-4XXX | 453F | ONVOY, LLC - MT | FROMBERG | AS | 09/22/2011 | MT | WE | 10/20/2011 |
| 406-668-5XXX | 453F | ONVOY, LLC - MT | FROMBERG | AS | 07/21/2023 | MT | WE | 08/20/2023 |
| 406-668-6XXX | 453F | ONVOY, LLC - MT | FROMBERG | AS | 02/21/2007 | MT | WE | 03/19/2007 |
| 406-668-7XXX | 9636 | QWEST CORPORATION | FROMBERG | RT | MT | WE | ||
| 406-668-8XXX | 508J | CENTURYLINK COMMUNICATIONS, LLC | FROMBERG | AS | 07/07/2016 | MT | WE | 08/11/2016 |
| 406-668-9XXX | 9636 | QWEST CORPORATION | FROMBERG | RT | MT | WE | ||
| 406-668-XXXX | 9636 | QWEST CORPORATION | FROMBERG | AS | MT |
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