🔎 Tip: Click any Company, OCN, Rate Center, or CLLI to explore related telecom data
| npa-nxx | State/Province | Company | FRN | RMD | OCN | Rate Center | CLLI | Assign Date | Misc |
| 443-663 | MD | VERIZON MARYLAND, INC. (Verizon Communications) | 0002166825 | RMD0002941 | 9212 | WOODLAWN | WDLWMDWLDS0 | 00/00/0000 | Prefix Type: RBOC Switch Name: WOODLAWN Switch Type: Northern Telecom DMS100 (Digital) Host LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: WDLWMDWLDS0)) |
| 443-663 is split into 1,000-number blocks - detail below | |||||||||
| 443-663-0XXX | MD | BALTIMORE-WASHINGTON TELEPHONE (BWT) | 0008104507 | RMD0004516 | 8697 | WOODLAWN | NOCLLIKNOWN | 05/27/2015 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN)) |
| 443-663-1XXX | MD | TERRA NOVA TELECOM INC. | 0021193057 | RMD0001495 | 145J | WOODLAWN | BLTMMDSNDS5 | 08/13/2024 | Prefix Type: IPES Switch Name: BRYNPKLNCM Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMDSNDS5)) |
| 443-663-2XXX | MD | CORE COMMUNICATIONS, INC.- MD | N/A | 2593 | WOODLAWN | WDLWMDWLDS0 | 04/15/2019 | Prefix Type: CLEC Switch Name: WOODLAWN Switch Type: Northern Telecom DMS100 (Digital) Host LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: WDLWMDWLDS0)) | |
| 443-663-3XXX | MD | ONVOY, LLC - MD (Sinch) | 0004323028 | RMD0001966 | 876D | WOODLAWN | NOCLLIKNOWN | 02/15/2016 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN)) |
| 443-663-4XXX | MD | ONVOY, LLC - MD (Sinch) | 0004323028 | RMD0001966 | 876D | WOODLAWN | NOCLLIKNOWN | 09/22/2015 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN)) |
| 443-663-5XXX | MD | ONVOY, LLC - MD (Sinch) | 0004323028 | RMD0001966 | 876D | WOODLAWN | NOCLLIKNOWN | 02/15/2016 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN)) |
| 443-663-6XXX | MD | VERIZON MARYLAND, INC. (Verizon Communications) | 0002166825 | RMD0002941 | 9212 | WOODLAWN | WDLWMDWLDS0 | N/A | Prefix Type: RBOC Switch Name: WOODLAWN Switch Type: Northern Telecom DMS100 (Digital) Host LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: WDLWMDWLDS0)) |
| 443-663-7XXX | MD | CENTURYLINK COMMUNICATIONS, LLC (Lumen Technologies, Inc) | 0031422439 | RMD0006976 | 508J | WOODLAWN | BLTMMDDN2MD | 05/23/2014 | Prefix Type: IPES Switch Name: GLENBURNIE Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMDDN2MD)) |
| 443-663-8XXX | MD | VERIZON MARYLAND, INC. (Verizon Communications) | 0002166825 | RMD0002941 | 9212 | WOODLAWN | WDLWMDWLDS0 | N/A | Prefix Type: RBOC Switch Name: WOODLAWN Switch Type: Northern Telecom DMS100 (Digital) Host LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: WDLWMDWLDS0)) |
| 443-663-9XXX | MD | IP HORIZON LLC | RMD0001571 | 515J | WOODLAWN | NOCLLIKNOWN | 05/03/2016 | Prefix Type: IPES Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN)) |