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
410-512	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	TWSNMDTWDS0	00/00/0000	Prefix Type: RBOC Switch Name: TOWSON Switch Type: WECO 5ESS (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-512 is split into 1,000-number blocks - detail below
410-512-0XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	TWSNMDTWDS0	N/A	Prefix Type: RBOC Switch Name: TOWSON Switch Type: WECO 5ESS (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-512-1XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	TWSNMDTWDS0	N/A	Prefix Type: RBOC Switch Name: TOWSON Switch Type: WECO 5ESS (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-512-2XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	TWSNMDTWDS0	N/A	Prefix Type: RBOC Switch Name: TOWSON Switch Type: WECO 5ESS (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-512-3XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	TWSNMDTWDS0	N/A	Prefix Type: RBOC Switch Name: TOWSON Switch Type: WECO 5ESS (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-512-4XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	TWSNMDTWDS0	N/A	Prefix Type: RBOC Switch Name: TOWSON Switch Type: WECO 5ESS (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-512-5XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	TWSNMDTWDS0	N/A	Prefix Type: RBOC Switch Name: TOWSON Switch Type: WECO 5ESS (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-512-6XXX	MD	LEVEL 3 COMMUNICATIONS, LLC - MD (Lumen Technologies, Inc)	0015338122	RMD0006112	6119	TOWSON	NOCLLIKNOWN	06/14/2006	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
410-512-7XXX	MD	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD (Verizon Wireless)	0003290673	RMD0003382	6395	TOWSON	TWSNMDTWDS0	12/11/2018	Prefix Type: WIRELESS Switch Name: TOWSON Switch Type: WECO 5ESS (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-512-8XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	TWSNMDTWDS0	N/A	Prefix Type: RBOC Switch Name: TOWSON Switch Type: WECO 5ESS (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: TWSNMDTWDS0))
410-512-9XXX	MD	ONVOY, LLC - MD (Sinch)	0004323028	RMD0001966	876D	TOWSON	NOCLLIKNOWN	03/14/2024	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))