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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
406-607	MT	BLACKFOOT COMMUNICATIONS, INC. - MT	0003732773	RMD0004777	7870	KALISPELL	KLSLMT83SWC	11/08/2013	Prefix Type: CLEC Switch Name: KALISPELL Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: KLSLMT83SWC))
406-607 is split into 1,000-number blocks - detail below
406-607-0XXX	MT	NEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)	0003291192	RMD0036909	6010	KALISPELL	MSSLMTAG5MD	05/09/2016	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTAG5MD))
406-607-1XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	KALISPELL	NOCLLIKNOWN	02/17/2021	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
406-607-2XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	KALISPELL	NOCLLIKNOWN	01/27/2022	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
406-607-3XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	KALISPELL	NOCLLIKNOWN	01/27/2022	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
406-607-4XXX	MT	BLACKFOOT COMMUNICATIONS, INC. - MT	0003732773	RMD0004777	7870	KALISPELL	KLSLMT83SWC	11/14/2013	Prefix Type: CLEC Switch Name: KALISPELL Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: KLSLMT83SWC))
406-607-5XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	KALISPELL	NOCLLIKNOWN	02/26/2020	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
406-607-6XXX	MT	ONVOY, LLC - MT (Sinch)	0004323028	RMD0001966	453F	KALISPELL	NOCLLIKNOWN	05/22/2019	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
406-607-7XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	KALISPELL	NOCLLIKNOWN	10/18/2018	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
406-607-8XXX	MT	ONVOY, LLC - MT (Sinch)	0004323028	RMD0001966	453F	KALISPELL	NOCLLIKNOWN	05/22/2019	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
406-607-9XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	KALISPELL	NOCLLIKNOWN	07/03/2019	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))