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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
847-720	IL	TELEPORT COMMUNICATIONS AMERICA, LLC - IL (AT&T)	0004274114	RMD0003897	7136	PARK RIDGE	CHCGIL24DS0	00/00/0000	Prefix Type: CLEC Switch Name: CHICAGO Switch Type: WECO 5ESS (Digital) LATA: Chicago IL METRO (358) Tandem: N/A 🔧 Explore Switch(CLLI: CHCGIL24DS0))
847-720 is split into 1,000-number blocks - detail below
847-720-0XXX	IL	TELEPORT COMMUNICATIONS AMERICA, LLC - IL (AT&T)	0004274114	RMD0003897	7136	PARK RIDGE	CHCGIL24DS0	N/A	Prefix Type: CLEC Switch Name: CHICAGO Switch Type: WECO 5ESS (Digital) LATA: Chicago IL METRO (358) Tandem: N/A 🔧 Explore Switch(CLLI: CHCGIL24DS0))
847-720-1XXX	IL	TELEPORT COMMUNICATIONS AMERICA, LLC - IL (AT&T)	0004274114	RMD0003897	7136	PARK RIDGE	CHCGIL24DS0	N/A	Prefix Type: CLEC Switch Name: CHICAGO Switch Type: WECO 5ESS (Digital) LATA: Chicago IL METRO (358) Tandem: N/A 🔧 Explore Switch(CLLI: CHCGIL24DS0))
847-720-2XXX	IL	TELEPORT COMMUNICATIONS AMERICA, LLC - IL (AT&T)	0004274114	RMD0003897	7136	PARK RIDGE	CHCGIL24DS0	N/A	Prefix Type: CLEC Switch Name: CHICAGO Switch Type: WECO 5ESS (Digital) LATA: Chicago IL METRO (358) Tandem: N/A 🔧 Explore Switch(CLLI: CHCGIL24DS0))
847-720-3XXX	IL	TELEPORT COMMUNICATIONS AMERICA, LLC - IL (AT&T)	0004274114	RMD0003897	7136	PARK RIDGE	CHCGIL24DS0	N/A	Prefix Type: CLEC Switch Name: CHICAGO Switch Type: WECO 5ESS (Digital) LATA: Chicago IL METRO (358) Tandem: N/A 🔧 Explore Switch(CLLI: CHCGIL24DS0))
847-720-4XXX	IL	COMCAST IP PHONE, LLC (Comcast)	0008497687	RMD0003552	318J	PARK RIDGE	CHCGILNEXJX	N/A	Prefix Type: IPES Switch Name: N/A Switch Type: N/A LATA: Chicago IL METRO (358) Tandem: N/A 🔧 Explore Switch(CLLI: CHCGILNEXJX))
847-720-5XXX	IL	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL (Verizon Communications)	0004999405	RMD0002957	7196	PARK RIDGE	CHCGILTCDS4	08/01/2005	Prefix Type: CLEC Switch Name: CHICGOZN01 Switch Type: N/A LATA: Chicago IL METRO (358) Tandem: N/A 🔧 Explore Switch(CLLI: CHCGILTCDS4))
847-720-6XXX	IL	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL (Verizon Communications)	0004999405	RMD0002957	7196	PARK RIDGE	CHCGILTCDS4	08/01/2005	Prefix Type: CLEC Switch Name: CHICGOZN01 Switch Type: N/A LATA: Chicago IL METRO (358) Tandem: N/A 🔧 Explore Switch(CLLI: CHCGILTCDS4))
847-720-7XXX	IL	FIRST COMMUNICATIONS, LLC	0003764487	RMD0014015	460K	PARK RIDGE	CHCGILWUX6X	07/27/2005	Prefix Type: UNKNOWN Switch Name: N/A Switch Type: N/A LATA: Chicago IL METRO (358) Tandem: N/A 🔧 Explore Switch(CLLI: CHCGILWUX6X))
847-720-8XXX	IL	TELEPORT COMMUNICATIONS AMERICA, LLC - IL (AT&T)	0004274114	RMD0003897	7136	PARK RIDGE	CHCGIL24DS0	N/A	Prefix Type: CLEC Switch Name: CHICAGO Switch Type: WECO 5ESS (Digital) LATA: Chicago IL METRO (358) Tandem: N/A 🔧 Explore Switch(CLLI: CHCGIL24DS0))
847-720-9XXX	IL	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL (Verizon Communications)	0004999405	RMD0002957	7196	PARK RIDGE	CHCGILTCDS4	08/01/2005	Prefix Type: CLEC Switch Name: CHICGOZN01 Switch Type: N/A LATA: Chicago IL METRO (358) Tandem: N/A 🔧 Explore Switch(CLLI: CHCGILTCDS4))