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| Raw Number | 301857 |
| Basic Format | 301-857 |
| NPA (Area Code) | 301 |
| NXX | 857 |
| NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | City | State | Region | Block Effective Date |
|---|---|---|---|---|---|---|---|---|---|
| 301-857-0XXX | 2593 | CORE COMMUNICATIONS, INC.- MD | CLEAR SPG | AS | 07/18/2002 | CLEAR SPRING | MD | MA | 09/10/2002 |
| 301-857-1XXX | 071F | BANDWIDTH.COM CLEC, LLC - MD | CLEAR SPG | AS | 09/11/2012 | CLEAR SPRING | MD | MA | 10/06/2012 |
| 301-857-2XXX | 071F | BANDWIDTH.COM CLEC, LLC - MD | CLEAR SPG | AS | 09/24/2014 | CLEAR SPRING | MD | MA | 10/20/2014 |
| 301-857-3XXX | 071F | BANDWIDTH.COM CLEC, LLC - MD | CLEAR SPG | AS | 09/29/2015 | CLEAR SPRING | MD | MA | 10/29/2015 |
| 301-857-4XXX | 876D | ONVOY, LLC - MD | CLEAR SPG | AS | 08/30/2016 | CLEAR SPRING | MD | MA | 09/12/2016 |
| 301-857-5XXX | 876D | ONVOY, LLC - MD | CLEAR SPG | AS | 08/30/2016 | CLEAR SPRING | MD | MA | 09/12/2016 |
| 301-857-6XXX | 508J | CENTURYLINK COMMUNICATIONS, LLC | CLEAR SPG | AS | 09/22/2016 | CLEAR SPRING | MD | MA | 10/26/2016 |
| 301-857-7XXX | 071F | BANDWIDTH.COM CLEC, LLC - MD | CLEAR SPG | AS | 04/17/2015 | CLEAR SPRING | MD | MA | 05/17/2015 |
| 301-857-8XXX | 071F | BANDWIDTH.COM CLEC, LLC - MD | CLEAR SPG | AS | 04/18/2006 | CLEAR SPRING | MD | MA | 08/22/2006 |
| 301-857-9XXX | 071F | BANDWIDTH.COM CLEC, LLC - MD | CLEAR SPG | AS | 04/17/2015 | CLEAR SPRING | MD | MA | 05/17/2015 |
| 301-857-XXXX | 2593 | CORE COMMUNICATIONS, INC.- MD | CLEAR SPG | AS | 07/12/2002 | CLEAR SPRING | MD |
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