You are reviewing the Area Code (NPA/NXX) report for 301-557. Did you mean to search the SMS short code 301557?
NPA-NXX-X | OCN | Company | Rate Center | Use Type | Assign Date | City | State | Region | Block Effective Date |
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301-557-0XXX | 4036 | NEW CINGULAR WIRELESS PCS, LLC - DC | WSHNGTNZN3 | AS | 09/02/2014 | WASHINGTON ZONE 3 | MD | MA | 09/12/2014 |
301-557-1XXX | 6119 | LEVEL 3 COMMUNICATIONS, LLC - MD | WSHNGTNZN3 | AS | 09/16/2011 | WASHINGTON ZONE 3 | MD | MA | 10/29/2011 |
301-557-2XXX | 6119 | LEVEL 3 COMMUNICATIONS, LLC - MD | WSHNGTNZN3 | AS | 09/16/2011 | WASHINGTON ZONE 3 | MD | MA | 10/29/2011 |
301-557-3XXX | 6119 | LEVEL 3 COMMUNICATIONS, LLC - MD | WSHNGTNZN3 | AS | 09/16/2011 | WASHINGTON ZONE 3 | MD | MA | 10/29/2011 |
301-557-4XXX | 6119 | LEVEL 3 COMMUNICATIONS, LLC - MD | WSHNGTNZN3 | AS | 09/16/2011 | WASHINGTON ZONE 3 | MD | MA | 10/29/2011 |
301-557-5XXX | 6119 | LEVEL 3 COMMUNICATIONS, LLC - MD | WSHNGTNZN3 | AS | 09/16/2011 | WASHINGTON ZONE 3 | MD | MA | 10/29/2011 |
301-557-6XXX | 6119 | LEVEL 3 COMMUNICATIONS, LLC - MD | WSHNGTNZN3 | AS | 09/16/2011 | WASHINGTON ZONE 3 | MD | MA | 10/29/2011 |
301-557-7XXX | 6119 | LEVEL 3 COMMUNICATIONS, LLC - MD | WSHNGTNZN3 | AS | 09/16/2011 | WASHINGTON ZONE 3 | MD | MA | 10/29/2011 |
301-557-8XXX | 6119 | LEVEL 3 COMMUNICATIONS, LLC - MD | WSHNGTNZN3 | AS | 09/16/2011 | WASHINGTON ZONE 3 | MD | MA | 10/29/2011 |
301-557-9XXX | 318J | COMCAST IP PHONE, LLC | WSHNGTNZN3 | AS | 08/15/2013 | WASHINGTON ZONE 3 | MD | MA | 09/08/2013 |
301-557-XXXX | 6119 | LEVEL 3 COMMUNICATIONS, LLC - MD | WSHNGTNZN3 | AS | 09/06/2011 | WASHINGTON ZONE 3 | MD | | |
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