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| npa-nxx | State | Company | OCN | Rate Center | CLLI | Assign Date | Misc |
| 301-533 | MD | VERIZON MARYLAND, INC. (Verizon Communications) | 9212 | OAKLAND | OKLDMDOKDS0 | 00/00/0000 | Prefix Type: RBOC Switch Name: OAKLAND Switch Type: NTDMS100 LATA: Hagerstown MD (240) Tandem: N/A Detailed Switch Info |
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| 301-533-0 | MD | VERIZON MARYLAND, INC. (Verizon Communications) | 9212 | OAKLAND | OKLDMDOKDS0 | N/A | Prefix Type: RBOC Switch Name: OAKLAND Switch Type: NTDMS100 LATA: Hagerstown MD (240) Tandem: N/A Detailed Switch Info |
| 301-533-1 | MD | VERIZON MARYLAND, INC. (Verizon Communications) | 9212 | OAKLAND | OKLDMDOKDS0 | N/A | Prefix Type: RBOC Switch Name: OAKLAND Switch Type: NTDMS100 LATA: Hagerstown MD (240) Tandem: N/A Detailed Switch Info |
| 301-533-2 | MD | VERIZON MARYLAND, INC. (Verizon Communications) | 9212 | OAKLAND | OKLDMDOKDS0 | N/A | Prefix Type: RBOC Switch Name: OAKLAND Switch Type: NTDMS100 LATA: Hagerstown MD (240) Tandem: N/A Detailed Switch Info |
| 301-533-3 | MD | VERIZON MARYLAND, INC. (Verizon Communications) | 9212 | OAKLAND | OKLDMDOKDS0 | N/A | Prefix Type: RBOC Switch Name: OAKLAND Switch Type: NTDMS100 LATA: Hagerstown MD (240) Tandem: N/A Detailed Switch Info |
| 301-533-4 | MD | VERIZON MARYLAND, INC. (Verizon Communications) | 9212 | OAKLAND | OKLDMDOKDS0 | N/A | Prefix Type: RBOC Switch Name: OAKLAND Switch Type: NTDMS100 LATA: Hagerstown MD (240) Tandem: N/A Detailed Switch Info |
| 301-533-5 | MD | CORE COMMUNICATIONS, INC.- MD | 2593 | OAKLAND | NOCLLIKNOWN | 04/16/2019 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Hagerstown MD (240) Tandem: N/A Detailed Switch Info |
| 301-533-6 | MD | NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless) | 4036 | OAKLAND | MNRVMDMOXFX | 01/08/2008 | Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Hagerstown MD (240) Tandem: N/A Detailed Switch Info |
| 301-533-7 | MD | LEVEL 3 COMMUNICATIONS, LLC - MD (CenturyLink, Inc) | 6119 | OAKLAND | NOCLLIKNOWN | 02/01/2008 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Hagerstown MD (240) Tandem: N/A Detailed Switch Info |
| 301-533-8 | MD | YMAX COMMUNICATIONS CORP. - MD (YMAX (a/k/a MagicJack)) | 281E | OAKLAND | NOCLLIKNOWN | 03/04/2009 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Hagerstown MD (240) Tandem: N/A Detailed Switch Info |
| 301-533-9 | MD | FIBERNET, LLC - WV | 4095 | OAKLAND | NOCLLIKNOWN | 01/23/2004 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Hagerstown MD (240) Tandem: N/A Detailed Switch Info |