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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
406-304	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	MISSOULA	MSSLMTMACMD	03/25/2016	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTMACMD)) 🕘 Prefix History 🔎 Explore Carrier Information
406-304 is split into 1,000-number blocks - detail below
406-304-0XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	MISSOULA	MSSLMTMACMD	12/11/2020	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTMACMD)) 🕘 Prefix History 🔎 Explore Carrier Information
406-304-1XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	MISSOULA	MSSLMTMACMD	08/25/2020	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTMACMD)) 🕘 Prefix History 🔎 Explore Carrier Information
406-304-2XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	MISSOULA	MSSLMTMACMD	01/07/2020	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTMACMD)) 🕘 Prefix History 🔎 Explore Carrier Information
406-304-3XXX	MT	CHARTER IP ENABLED SERVICES, LLC		N/A	792K	MISSOULA	MSSLMTEH4MD	11/16/2016	Prefix Type: IPES Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTEH4MD)) 🕘 Prefix History 🔎 Explore Carrier Information
406-304-4XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	MISSOULA	MSSLMTMACMD	03/27/2019	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTMACMD)) 🕘 Prefix History 🔎 Explore Carrier Information
406-304-5XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	MISSOULA	MSSLMTMACMD	11/07/2018	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTMACMD)) 🕘 Prefix History 🔎 Explore Carrier Information
406-304-6XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	MISSOULA	MSSLMTMACMD	01/03/2018	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTMACMD)) 🕘 Prefix History 🔎 Explore Carrier Information
406-304-7XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	MISSOULA	MSSLMTMACMD	03/15/2017	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTMACMD)) 🕘 Prefix History 🔎 Explore Carrier Information
406-304-8XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	MISSOULA	MSSLMTMACMD	03/15/2017	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTMACMD)) 🕘 Prefix History 🔎 Explore Carrier Information
406-304-9XXX	MT	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	MISSOULA	MSSLMTMACMD	03/25/2016	Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: Great Falls MT (648) Tandem: N/A 🔧 Explore Switch(CLLI: MSSLMTMACMD)) 🕘 Prefix History 🔎 Explore Carrier Information