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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
408-677	CA	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	SNJS SOUTH	CNCRCALZ0MD	02/22/2006	Prefix Type: PCS Switch Name: CONCORD Switch Type: N/A LATA: San Francisco CA (722) Tandem: N/A 🔧 Explore Switch(CLLI: CNCRCALZ0MD))
408-677 is split into 1,000-number blocks - detail below
408-677-0XXX	CA	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	SNJS SOUTH	CNCRCALZ0MD	02/27/2006	Prefix Type: PCS Switch Name: CONCORD Switch Type: N/A LATA: San Francisco CA (722) Tandem: N/A 🔧 Explore Switch(CLLI: CNCRCALZ0MD))
408-677-1XXX	CA	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	SNJS SOUTH	CNCRCALZ0MD	08/28/2006	Prefix Type: PCS Switch Name: CONCORD Switch Type: N/A LATA: San Francisco CA (722) Tandem: N/A 🔧 Explore Switch(CLLI: CNCRCALZ0MD))
408-677-2XXX	CA	ONVOY, LLC - CA (Sinch)	0004323028	RMD0001966	649C	SNJS SOUTH	NOCLLIKNOWN	10/05/2006	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: San Francisco CA (722) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
408-677-3XXX	CA	COMCAST PHONE OF CALIFORNIA, LLC		N/A	394L	SNJS SOUTH	OKLDCA03XOY	06/21/2007	Prefix Type: UNKNOWN Switch Name: N/A Switch Type: N/A LATA: San Francisco CA (722) Tandem: N/A 🔧 Explore Switch(CLLI: OKLDCA03XOY))
408-677-4XXX	CA	COMCAST PHONE OF CALIFORNIA, LLC		N/A	394L	SNJS SOUTH	OKLDCA03XOY	09/01/2006	Prefix Type: UNKNOWN Switch Name: N/A Switch Type: N/A LATA: San Francisco CA (722) Tandem: N/A 🔧 Explore Switch(CLLI: OKLDCA03XOY))
408-677-5XXX	CA	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	0004999405	RMD0002957	7229	SNJS SOUTH	HYWRCA115MD	10/23/2006	Prefix Type: CLEC Switch Name: HAYWARD Switch Type: N/A LATA: San Francisco CA (722) Tandem: N/A 🔧 Explore Switch(CLLI: HYWRCA115MD))
408-677-6XXX	CA	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (Verizon Wireless)	0029611852	RMD0003439	6006	SNJS SOUTH	HYWRCAMCDMD	04/10/2006	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: San Francisco CA (722) Tandem: N/A 🔧 Explore Switch(CLLI: HYWRCAMCDMD))
408-677-7XXX	CA	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (Verizon Wireless)	0029611852	RMD0003439	6006	SNJS SOUTH	HYWRCAMCDMD	04/10/2006	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: San Francisco CA (722) Tandem: N/A 🔧 Explore Switch(CLLI: HYWRCAMCDMD))
408-677-8XXX	CA	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA (Verizon Wireless)	0029611852	RMD0003439	6006	SNJS SOUTH	HYWRCAMCDMD	04/10/2006	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: San Francisco CA (722) Tandem: N/A 🔧 Explore Switch(CLLI: HYWRCAMCDMD))
408-677-9XXX	CA	T-MOBILE USA, INC. (T-Mobile US, Inc)	0017078262	RMD0019051	6529	SNJS SOUTH	CNCRCALZ0MD	02/27/2006	Prefix Type: PCS Switch Name: CONCORD Switch Type: N/A LATA: San Francisco CA (722) Tandem: N/A 🔧 Explore Switch(CLLI: CNCRCALZ0MD))