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npa-nxxStateCompanyOCNRate CenterCLLIAssign DateMisc
443-507MDTELEPORT COMMUNICATIONS AMERIC (AT&T)7325HAMPSTEADBLTMMDFMDS000/00/0000Prefix Type: CLEC
Switch Name: BALTIMORE
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: Baltimore MD (238)
Tandem: N/A
Detailed Switch Info
Thousands block for 443-507
443-507-0MDVERIZON MARYLAND, INC. (Verizon Communications)9212HAMPSTEADHMPSMDHERS109/11/2003Prefix Type: RBOC
Switch Name: HAMPSTEAD
Switch Type: AT&T 5ESS-2000 VCDX
LATA: Baltimore MD (238)
Tandem: N/A
Detailed Switch Info
443-507-1MDUS LEC OF MARYLAND, INC.2589HAMPSTEADCLMAMDJTDS006/26/2003Prefix Type: CLEC
Switch Name: COLUMBIA
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
Detailed Switch Info
443-507-2MDTERRA NOVA TELECOM INC.145JHAMPSTEADNOCLLIKNOWN06/07/2022Prefix Type: IPES
Switch Name: N/A
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
Detailed Switch Info
443-507-3MDCORE COMMUNICATIONS, INC.- MD2593HAMPSTEADNOCLLIKNOWN03/01/2004Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
Detailed Switch Info
443-507-4MDQUANTUM TELECOMMUNICATIONS, IN2596HAMPSTEADNOCLLIKNOWN01/04/2016Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
Detailed Switch Info
443-507-5MDVERIZON MARYLAND, INC. (Verizon Communications)9212HAMPSTEADHMPSMDHERS104/22/2005Prefix Type: RBOC
Switch Name: HAMPSTEAD
Switch Type: AT&T 5ESS-2000 VCDX
LATA: Baltimore MD (238)
Tandem: N/A
Detailed Switch Info
443-507-6MDCOMCAST IP PHONE, LLC318JHAMPSTEADNOCLLIKNOWN05/15/2009Prefix Type: IPES
Switch Name: N/A
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
Detailed Switch Info
443-507-7MDCORE COMMUNICATIONS, INC.- MD2593HAMPSTEADNOCLLIKNOWN05/23/2018Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
Detailed Switch Info
443-507-8MDBANDWIDTH.COM CLEC, LLC - MD071FHAMPSTEADNOCLLIKNOWN06/07/2011Prefix Type: CLEC
Switch Name: N/A
Switch Type: N/A
LATA: Baltimore MD (238)
Tandem: N/A
Detailed Switch Info
443-507-9MDTELEPORT COMMUNICATIONS AMERIC (AT&T)7325HAMPSTEADBLTMMDFMDS0N/APrefix Type: CLEC
Switch Name: BALTIMORE
Switch Type: Northern Telecom DMS100 (Digital) Host
LATA: Baltimore MD (238)
Tandem: N/A
Detailed Switch Info
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