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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
337-780	LA	VOICESTREAM GSM I, LLC (T-Mobile US, Inc)		N/A	150C	LAFAYETTE	LFYTLA360MD	10/26/2001	Prefix Type: PCS Switch Name: LAFAYETTE Switch Type: N/A LATA: Lafayette LA (488) Tandem: N/A 🔧 Explore Switch(CLLI: LFYTLA360MD)) 🕘 Prefix History 🔎 Explore Carrier Information
337-780 is split into 1,000-number blocks - detail below
337-780-0XXX	LA	VOICESTREAM GSM I, LLC (T-Mobile US, Inc)		N/A	150C	LAFAYETTE	LFYTLA360MD	06/10/2011	Prefix Type: PCS Switch Name: LAFAYETTE Switch Type: N/A LATA: Lafayette LA (488) Tandem: N/A 🔧 Explore Switch(CLLI: LFYTLA360MD)) 🕘 Prefix History 🔎 Explore Carrier Information
337-780-1XXX	LA	VOICESTREAM GSM I, LLC (T-Mobile US, Inc)		N/A	150C	LAFAYETTE	LFYTLA360MD	N/A	Prefix Type: PCS Switch Name: LAFAYETTE Switch Type: N/A LATA: Lafayette LA (488) Tandem: N/A 🔧 Explore Switch(CLLI: LFYTLA360MD)) 🕘 Prefix History 🔎 Explore Carrier Information
337-780-4XXX	LA	VOICESTREAM GSM I, LLC (T-Mobile US, Inc)		N/A	150C	LAFAYETTE	LFYTLA360MD	02/09/2007	Prefix Type: PCS Switch Name: LAFAYETTE Switch Type: N/A LATA: Lafayette LA (488) Tandem: N/A 🔧 Explore Switch(CLLI: LFYTLA360MD)) 🕘 Prefix History 🔎 Explore Carrier Information
337-780-5XXX	LA	VOICESTREAM GSM I, LLC (T-Mobile US, Inc)		N/A	150C	LAFAYETTE	LFYTLA360MD	02/09/2007	Prefix Type: PCS Switch Name: LAFAYETTE Switch Type: N/A LATA: Lafayette LA (488) Tandem: N/A 🔧 Explore Switch(CLLI: LFYTLA360MD)) 🕘 Prefix History 🔎 Explore Carrier Information
337-780-6XXX	LA	VOICESTREAM GSM I, LLC (T-Mobile US, Inc)		N/A	150C	LAFAYETTE	LFYTLA360MD	02/09/2007	Prefix Type: PCS Switch Name: LAFAYETTE Switch Type: N/A LATA: Lafayette LA (488) Tandem: N/A 🔧 Explore Switch(CLLI: LFYTLA360MD)) 🕘 Prefix History 🔎 Explore Carrier Information
337-780-7XXX	LA	VOICESTREAM GSM I, LLC (T-Mobile US, Inc)		N/A	150C	LAFAYETTE	LFYTLA360MD	12/29/2006	Prefix Type: PCS Switch Name: LAFAYETTE Switch Type: N/A LATA: Lafayette LA (488) Tandem: N/A 🔧 Explore Switch(CLLI: LFYTLA360MD)) 🕘 Prefix History 🔎 Explore Carrier Information
337-780-8XXX	LA	VOICESTREAM GSM I, LLC (T-Mobile US, Inc)		N/A	150C	LAFAYETTE	LFYTLA360MD	12/29/2006	Prefix Type: PCS Switch Name: LAFAYETTE Switch Type: N/A LATA: Lafayette LA (488) Tandem: N/A 🔧 Explore Switch(CLLI: LFYTLA360MD)) 🕘 Prefix History 🔎 Explore Carrier Information
337-780-9XXX	LA	VOICESTREAM GSM I, LLC (T-Mobile US, Inc)		N/A	150C	LAFAYETTE	LFYTLA360MD	N/A	Prefix Type: PCS Switch Name: LAFAYETTE Switch Type: N/A LATA: Lafayette LA (488) Tandem: N/A 🔧 Explore Switch(CLLI: LFYTLA360MD)) 🕘 Prefix History 🔎 Explore Carrier Information