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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
618-651	IL	FRONTIER NORTH, INC. - IL (Frontier Communications)		N/A	1015	HIGHLAND	HGLDILXEDS0	00/00/0000	Prefix Type: ICO Switch Name: HIGHLAND Switch Type: GTD5EAX LATA: St.Louis MO (520) Tandem: COVLILCQ50T 🔧 Explore Switch(CLLI: HGLDILXEDS0))
618-651 is split into 1,000-number blocks - detail below
618-651-0XXX	IL	FRONTIER NORTH, INC. - IL (Frontier Communications)		N/A	1015	HIGHLAND	HGLDILXEDS0	N/A	Prefix Type: ICO Switch Name: HIGHLAND Switch Type: GTD5EAX LATA: St.Louis MO (520) Tandem: COVLILCQ50T 🔧 Explore Switch(CLLI: HGLDILXEDS0))
618-651-1XXX	IL	FRONTIER NORTH, INC. - IL (Frontier Communications)		N/A	1015	HIGHLAND	HGLDILXEDS0	N/A	Prefix Type: ICO Switch Name: HIGHLAND Switch Type: GTD5EAX LATA: St.Louis MO (520) Tandem: COVLILCQ50T 🔧 Explore Switch(CLLI: HGLDILXEDS0))
618-651-2XXX	IL	FRONTIER NORTH, INC. - IL (Frontier Communications)		N/A	1015	HIGHLAND	HGLDILXEDS0	N/A	Prefix Type: ICO Switch Name: HIGHLAND Switch Type: GTD5EAX LATA: St.Louis MO (520) Tandem: COVLILCQ50T 🔧 Explore Switch(CLLI: HGLDILXEDS0))
618-651-3XXX	IL	FRONTIER NORTH, INC. - IL (Frontier Communications)		N/A	1015	HIGHLAND	HGLDILXEDS0	N/A	Prefix Type: ICO Switch Name: HIGHLAND Switch Type: GTD5EAX LATA: St.Louis MO (520) Tandem: COVLILCQ50T 🔧 Explore Switch(CLLI: HGLDILXEDS0))
618-651-4XXX	IL	LEVEL 3 COMMUNICATIONS, LLC - IL (Lumen Technologies, Inc)	0015338122	RMD0006112	6115	HIGHLAND	NOCLLIKNOWN	06/17/2010	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: St.Louis MO (520) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
618-651-5XXX	IL	ONVOY, LLC (Sinch)	0004323028	RMD0001966	224C	HIGHLAND	NOCLLIKNOWN	06/29/2018	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: St.Louis MO (520) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
618-651-6XXX	IL	LEVEL 3 COMMUNICATIONS, LLC - IL (Lumen Technologies, Inc)	0015338122	RMD0006112	6115	HIGHLAND	NOCLLIKNOWN	01/17/2008	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: St.Louis MO (520) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
618-651-7XXX	IL	DELTA COMMS, LLC DBA CLEARWAVE COMMUNICATIONS - IL		N/A	075A	HIGHLAND	NOCLLIKNOWN	02/01/2021	Prefix Type: UNKNOWN Switch Name: N/A Switch Type: N/A LATA: St.Louis MO (520) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
618-651-8XXX	IL	FRONTIER NORTH, INC. - IL (Frontier Communications)		N/A	1015	HIGHLAND	HGLDILXEDS0	N/A	Prefix Type: ICO Switch Name: HIGHLAND Switch Type: GTD5EAX LATA: St.Louis MO (520) Tandem: COVLILCQ50T 🔧 Explore Switch(CLLI: HGLDILXEDS0))
618-651-9XXX	IL	FRONTIER NORTH, INC. - IL (Frontier Communications)		N/A	1015	HIGHLAND	HGLDILXEDS0	N/A	Prefix Type: ICO Switch Name: HIGHLAND Switch Type: GTD5EAX LATA: St.Louis MO (520) Tandem: COVLILCQ50T 🔧 Explore Switch(CLLI: HGLDILXEDS0))