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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
410-561	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	CYVLMDCKDS0	00/00/0000	Prefix Type: RBOC Switch Name: COCKEYSVILLE Switch Type: WECO 5ESS Host (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CYVLMDCKDS0))
410-561 is split into 1,000-number blocks - detail below
410-561-0XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	CYVLMDCKDS0	N/A	Prefix Type: RBOC Switch Name: COCKEYSVILLE Switch Type: WECO 5ESS Host (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CYVLMDCKDS0))
410-561-1XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	CYVLMDCKDS0	N/A	Prefix Type: RBOC Switch Name: COCKEYSVILLE Switch Type: WECO 5ESS Host (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CYVLMDCKDS0))
410-561-2XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	CYVLMDCKDS0	N/A	Prefix Type: RBOC Switch Name: COCKEYSVILLE Switch Type: WECO 5ESS Host (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CYVLMDCKDS0))
410-561-3XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	CYVLMDCKDS0	N/A	Prefix Type: RBOC Switch Name: COCKEYSVILLE Switch Type: WECO 5ESS Host (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CYVLMDCKDS0))
410-561-4XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	CYVLMDCKDS0	N/A	Prefix Type: RBOC Switch Name: COCKEYSVILLE Switch Type: WECO 5ESS Host (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CYVLMDCKDS0))
410-561-5XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	CYVLMDCKDS0	N/A	Prefix Type: RBOC Switch Name: COCKEYSVILLE Switch Type: WECO 5ESS Host (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CYVLMDCKDS0))
410-561-6XXX	MD	LEVEL 3 COMMUNICATIONS, LLC - MD (Lumen Technologies, Inc)	0015338122	RMD0006112	6119	TOWSON	NOCLLIKNOWN	11/10/2004	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
410-561-7XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	CYVLMDCKDS0	N/A	Prefix Type: RBOC Switch Name: COCKEYSVILLE Switch Type: WECO 5ESS Host (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CYVLMDCKDS0))
410-561-8XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	CYVLMDCKDS0	N/A	Prefix Type: RBOC Switch Name: COCKEYSVILLE Switch Type: WECO 5ESS Host (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CYVLMDCKDS0))
410-561-9XXX	MD	VERIZON MARYLAND, INC. (Verizon Communications)	0002166825	RMD0002941	9212	TOWSON	CYVLMDCKDS0	N/A	Prefix Type: RBOC Switch Name: COCKEYSVILLE Switch Type: WECO 5ESS Host (Digital) LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: CYVLMDCKDS0))