TelcoData.US: Search by Area Code / Exchange

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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
301-556	MD	TELEPORT COMMUNICATIONS AMERICA, LLC - DC (AT&T)	0004274114	RMD0003897	7529	GAITHERSBG	WASHDCTTDS0	00/00/0000	Prefix Type: CLEC Switch Name: WASHINGTON Switch Type: Northern Telecom DMS100 (Digital) Host LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: WASHDCTTDS0))
301-556 is split into 1,000-number blocks - detail below
301-556-0XXX	MD	TELEPORT COMMUNICATIONS AMERICA, LLC - DC (AT&T)	0004274114	RMD0003897	7529	GAITHERSBG	WASHDCTTDS0	N/A	Prefix Type: CLEC Switch Name: WASHINGTON Switch Type: Northern Telecom DMS100 (Digital) Host LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: WASHDCTTDS0))
301-556-1XXX	MD	TELEPORT COMMUNICATIONS AMERICA, LLC - DC (AT&T)	0004274114	RMD0003897	7529	GAITHERSBG	WASHDCTTDS0	N/A	Prefix Type: CLEC Switch Name: WASHINGTON Switch Type: Northern Telecom DMS100 (Digital) Host LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: WASHDCTTDS0))
301-556-2XXX	MD	TELEPORT COMMUNICATIONS AMERICA, LLC - DC (AT&T)	0004274114	RMD0003897	7529	GAITHERSBG	WASHDCTTDS0	N/A	Prefix Type: CLEC Switch Name: WASHINGTON Switch Type: Northern Telecom DMS100 (Digital) Host LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: WASHDCTTDS0))
301-556-3XXX	MD	METROPCS, INC. (T-Mobile US, Inc)		N/A	5562	GAITHERSBG	BTVLMD12CMA	10/21/2004	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: BTVLMD12CMA))
301-556-4XXX	MD	TELEPORT COMMUNICATIONS AMERICA, LLC - DC (AT&T)	0004274114	RMD0003897	7529	GAITHERSBG	WASHDCTTDS0	N/A	Prefix Type: CLEC Switch Name: WASHINGTON Switch Type: Northern Telecom DMS100 (Digital) Host LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: WASHDCTTDS0))
301-556-5XXX	MD	VDL, INC. DBA GLOBAL TELECOM BROKERS - MD	0018511246	RMD0003054	4492	GAITHERSBG	NOCLLIKNOWN	02/24/2004	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
301-556-6XXX	MD	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (T-Mobile US, Inc)		N/A	6855	GAITHERSBG	NOCLLIKNOWN	02/05/2004	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
301-556-7XXX	MD	METROPCS, INC. (T-Mobile US, Inc)		N/A	5562	GAITHERSBG	BTVLMD12CMA	02/05/2004	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: BTVLMD12CMA))
301-556-8XXX	MD	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC (T-Mobile US, Inc)		N/A	6855	GAITHERSBG	NOCLLIKNOWN	10/18/2005	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
301-556-9XXX	MD	TELEPORT COMMUNICATIONS AMERICA, LLC - DC (AT&T)	0004274114	RMD0003897	7529	GAITHERSBG	WASHDCTTDS0	N/A	Prefix Type: CLEC Switch Name: WASHINGTON Switch Type: Northern Telecom DMS100 (Digital) Host LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: WASHDCTTDS0))