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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
410-972	MD	TELEPORT COMMUNICATIONS AMERICA, LLC - MD (AT&T)	0004274114	RMD0003897	7325	ANNAPOLIS	BLTMMDFMDS0	00/00/0000	Prefix Type: CLEC Switch Name: BALTIMORE Switch Type: Northern Telecom DMS100 (Digital) Host LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMDFMDS0))
410-972 is split into 1,000-number blocks - detail below
410-972-0XXX	MD	TELEPORT COMMUNICATIONS AMERICA, LLC - MD (AT&T)	0004274114	RMD0003897	7325	ANNAPOLIS	BLTMMDFMDS0	N/A	Prefix Type: CLEC Switch Name: BALTIMORE Switch Type: Northern Telecom DMS100 (Digital) Host LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMDFMDS0))
410-972-1XXX	MD	NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)	0003291192	RMD0036909	4036	ANNAPOLIS	CLMAMDORGT0	02/10/2004	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CLMAMDORGT0))
410-972-2XXX	MD	TELEPORT COMMUNICATIONS AMERICA, LLC - MD (AT&T)	0004274114	RMD0003897	7325	ANNAPOLIS	BLTMMDFMDS0	N/A	Prefix Type: CLEC Switch Name: BALTIMORE Switch Type: Northern Telecom DMS100 (Digital) Host LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMDFMDS0))
410-972-3XXX	MD	TELEPORT COMMUNICATIONS AMERICA, LLC - MD (AT&T)	0004274114	RMD0003897	7325	ANNAPOLIS	BLTMMDFMDS0	N/A	Prefix Type: CLEC Switch Name: BALTIMORE Switch Type: Northern Telecom DMS100 (Digital) Host LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMDFMDS0))
410-972-4XXX	MD	TELEPORT COMMUNICATIONS AMERICA, LLC - MD (AT&T)	0004274114	RMD0003897	7325	ANNAPOLIS	BLTMMDFMDS0	N/A	Prefix Type: CLEC Switch Name: BALTIMORE Switch Type: Northern Telecom DMS100 (Digital) Host LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMDFMDS0))
410-972-5XXX	MD	NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)	0003291192	RMD0036909	4036	ANNAPOLIS	CLMAMDORGT0	07/27/2011	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CLMAMDORGT0))
410-972-6XXX	MD	NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)	0003291192	RMD0036909	4036	ANNAPOLIS	CLMAMDORGT0	07/27/2011	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CLMAMDORGT0))
410-972-7XXX	MD	NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)	0003291192	RMD0036909	4036	ANNAPOLIS	CLMAMDORGT0	07/27/2011	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CLMAMDORGT0))
410-972-8XXX	MD	NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)	0003291192	RMD0036909	4036	ANNAPOLIS	CLMAMDORGT0	07/27/2011	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CLMAMDORGT0))
410-972-9XXX	MD	NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)	0003291192	RMD0036909	4036	ANNAPOLIS	CLMAMDORGT0	07/27/2011	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CLMAMDORGT0))