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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
406-260	MT	NEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)	0003291192	RMD0036909	6010	KALISPELL	MSSLMTAG5MD	00/00/0000	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTAG5MD))
406-260 is split into 1,000-number blocks - detail below
406-260-0XXX	MT	NEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)	0003291192	RMD0036909	6010	KALISPELL	MSSLMTAG5MD	N/A	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTAG5MD))
406-260-1XXX	MT	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (Verizon Wireless)	0001627702	RMD0003346	6564	KALISPELL	HLNAMTMAX1X	12/26/2007	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: HLNAMTMAX1X))
406-260-2XXX	MT	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (Verizon Wireless)	0001627702	RMD0003346	6564	KALISPELL	HLNAMTMAX1X	12/26/2007	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: HLNAMTMAX1X))
406-260-3XXX	MT	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (Verizon Wireless)	0001627702	RMD0003346	6564	KALISPELL	HLNAMTMAX1X	12/26/2007	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: HLNAMTMAX1X))
406-260-4XXX	MT	CHARTER IP ENABLED SERVICES, LLC		N/A	792K	KALISPELL	KLSLMTAZ1MD	04/04/2008	Prefix Type: IPES Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: KLSLMTAZ1MD))
406-260-5XXX	MT	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (Verizon Wireless)	0001627702	RMD0003346	6564	KALISPELL	HLNAMTMAX1X	06/10/2008	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: HLNAMTMAX1X))
406-260-6XXX	MT	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (Verizon Wireless)	0001627702	RMD0003346	6564	KALISPELL	HLNAMTMAX1X	06/10/2008	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: HLNAMTMAX1X))
406-260-7XXX	MT	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (Verizon Wireless)	0001627702	RMD0003346	6564	KALISPELL	HLNAMTMAX1X	09/10/2008	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: HLNAMTMAX1X))
406-260-8XXX	MT	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT (Verizon Wireless)	0001627702	RMD0003346	6564	KALISPELL	HLNAMTMAX1X	09/10/2008	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: HLNAMTMAX1X))
406-260-9XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	KALISPELL	NOCLLIKNOWN	09/08/2022	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))