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Last Updated: Thu Jun 11 03:54:41 2026
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| 443-505 | MD | LEVEL 3 COMMUNICATIONS, LLC - MD (Lumen Technologies, Inc) | 0015338122 | RMD0006112 | 6119 | ESSEX | BLTOMDXIDS0 | 00/00/0000 | Prefix Type: CLEC Switch Name: BALTIMORE Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTOMDXIDS0)) |
| 443-505-0XXX | MD | NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless) | 0003291192 | RMD0036909 | 4036 | ESSEX | CLMAMDORGT0 | 04/21/2025 | Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CLMAMDORGT0)) |
| 443-505-1XXX | MD | NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless) | 0003291192 | RMD0036909 | 4036 | ESSEX | CLMAMDORGT0 | 04/21/2025 | Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CLMAMDORGT0)) |
| 443-505-2XXX | MD | LEVEL 3 COMMUNICATIONS, LLC - MD (Lumen Technologies, Inc) | 0015338122 | RMD0006112 | 6119 | ESSEX | BLTOMDXIDS0 | 12/01/2011 | Prefix Type: CLEC Switch Name: BALTIMORE Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTOMDXIDS0)) |
| 443-505-3XXX | MD | COMCAST IP PHONE, LLC (Comcast) | 0008497687 | RMD0003552 | 318J | ESSEX | BLTMMDCHXFX | 03/10/2014 | Prefix Type: IPES Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMDCHXFX)) |
| 443-505-4XXX | MD | NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless) | 0003291192 | RMD0036909 | 4036 | ESSEX | CLMAMDORGT0 | 09/03/2025 | Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CLMAMDORGT0)) |
| 443-505-5XXX | MD | NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless) | 0003291192 | RMD0036909 | 4036 | ESSEX | CLMAMDORGT0 | 12/27/2024 | Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CLMAMDORGT0)) |
| 443-505-6XXX | MD | BANDWIDTH.COM CLEC, LLC - MD | 0017042060 | RMD0003709 | 071F | ESSEX | NOCLLIKNOWN | 09/19/2018 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN)) |
| 443-505-7XXX | MD | LEVEL 3 COMMUNICATIONS, LLC - MD (Lumen Technologies, Inc) | 0015338122 | RMD0006112 | 6119 | ESSEX | BLTOMDXIDS0 | 05/06/2008 | Prefix Type: CLEC Switch Name: BALTIMORE Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTOMDXIDS0)) |
| 443-505-8XXX | MD | COMCAST IP PHONE, LLC (Comcast) | 0008497687 | RMD0003552 | 318J | ESSEX | BLTMMDCHXFX | 08/28/2014 | Prefix Type: IPES Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMDCHXFX)) |
| 443-505-9XXX | MD | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (T-Mobile US, Inc) | | N/A | 6855 | ESSEX | BLTMMDCHXWY | 09/10/2019 | Prefix Type: PCS Switch Name: BALTIMORE Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMDCHXWY)) |