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| npa-nxx | State | Company | OCN | Rate Center | CLLI | Assign Date | Misc |
| 601-640 | MS | AT&T ENTERPRISES, LLC (AT&T) | 516C | SEMINARY | JCSNMSPSXBY | 08/16/2011 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A Detailed Switch Info |
| 601-722 | MS | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (Bellsouth) | 9419 | SEMINARY | SNRYMSMADS1 | 00/00/0000 | Prefix Type: RBOC Switch Name: N/A Switch Type: Stromberg Carlson DCO RLS LATA: N/A Tandem: N/A Detailed Switch Info |
| 769-780 | MS | ONVOY, LLC - MS (Sinch) | 719E | SEMINARY | JCSNMSCPXMZ | 11/04/2020 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A Detailed Switch Info |