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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
206-291	WA	NEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)	0003291192	RMD0036909	6010	SEATTLE	STTLWA02DS1	00/00/0000	Prefix Type: WIRELESS Switch Name: SEATTLE Switch Type: Digital Switching System LATA: Seattle WA (674) Tandem: N/A 🔧 Explore Switch(CLLI: STTLWA02DS1))
206-291 is split into 1,000-number blocks - detail below
206-291-0XXX	WA	T-MOBILE USA, INC. (T-Mobile US, Inc)	0006945950	RMD0004209	6529	SEATTLE	STTLWA060MD	01/15/2006	Prefix Type: PCS Switch Name: SEATTLE Switch Type: N/A LATA: Seattle WA (674) Tandem: N/A 🔧 Explore Switch(CLLI: STTLWA060MD))
206-291-1XXX	WA	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA (Verizon Wireless)	0003290673	RMD0003382	5812	SEATTLE	STTLWAGAAMD	02/06/2026	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: Seattle WA (674) Tandem: N/A 🔧 Explore Switch(CLLI: STTLWAGAAMD))
206-291-2XXX	WA	T-MOBILE USA, INC. (T-Mobile US, Inc)	0006945950	RMD0004209	6529	SEATTLE	STTLWA060MD	01/15/2006	Prefix Type: PCS Switch Name: SEATTLE Switch Type: N/A LATA: Seattle WA (674) Tandem: N/A 🔧 Explore Switch(CLLI: STTLWA060MD))
206-291-3XXX	WA	NEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)	0003291192	RMD0036909	6010	SEATTLE	STTLWA02DS1	01/11/2006	Prefix Type: WIRELESS Switch Name: SEATTLE Switch Type: Digital Switching System LATA: Seattle WA (674) Tandem: N/A 🔧 Explore Switch(CLLI: STTLWA02DS1))
206-291-4XXX	WA	NEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)	0003291192	RMD0036909	6010	SEATTLE	STTLWA02DS1	07/03/2003	Prefix Type: WIRELESS Switch Name: SEATTLE Switch Type: Digital Switching System LATA: Seattle WA (674) Tandem: N/A 🔧 Explore Switch(CLLI: STTLWA02DS1))
206-291-5XXX	WA	NEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)	0003291192	RMD0036909	6010	SEATTLE	STTLWA02DS1	07/03/2003	Prefix Type: WIRELESS Switch Name: SEATTLE Switch Type: Digital Switching System LATA: Seattle WA (674) Tandem: N/A 🔧 Explore Switch(CLLI: STTLWA02DS1))
206-291-6XXX	WA	NEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)	0003291192	RMD0036909	6010	SEATTLE	STTLWA02DS1	07/03/2003	Prefix Type: WIRELESS Switch Name: SEATTLE Switch Type: Digital Switching System LATA: Seattle WA (674) Tandem: N/A 🔧 Explore Switch(CLLI: STTLWA02DS1))
206-291-7XXX	WA	NEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)	0003291192	RMD0036909	6010	SEATTLE	STTLWA02DS1	07/03/2003	Prefix Type: WIRELESS Switch Name: SEATTLE Switch Type: Digital Switching System LATA: Seattle WA (674) Tandem: N/A 🔧 Explore Switch(CLLI: STTLWA02DS1))
206-291-8XXX	WA	NEW CINGULAR WIRELESS PCS, LLC (AT&T Wireless)	0003291192	RMD0036909	6010	SEATTLE	STTLWA02DS1	07/03/2003	Prefix Type: WIRELESS Switch Name: SEATTLE Switch Type: Digital Switching System LATA: Seattle WA (674) Tandem: N/A 🔧 Explore Switch(CLLI: STTLWA02DS1))
206-291-9XXX	WA	BANDWIDTH.COM CLEC, LLC - WA	0017042060	RMD0003709	006F	SEATTLE	NOCLLIKNOWN	11/14/2025	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Seattle WA (674) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))