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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
301-323	MD	LEVEL 3 TELECOM OF MARYLAND, LLC - MD (Lumen Technologies, Inc)	0017348202	RMD0006082	7591	LAUREL236	LARLMDCC5MD	00/00/0000	Prefix Type: CLEC Switch Name: LAUREL Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: LARLMDCC5MD))
301-323 is split into 1,000-number blocks - detail below
301-323-0XXX	MD	LEVEL 3 TELECOM OF MARYLAND, LLC - MD (Lumen Technologies, Inc)	0017348202	RMD0006082	7591	LAUREL236	LARLMDCC5MD	N/A	Prefix Type: CLEC Switch Name: LAUREL Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: LARLMDCC5MD))
301-323-1XXX	MD	LEVEL 3 TELECOM OF MARYLAND, LLC - MD (Lumen Technologies, Inc)	0017348202	RMD0006082	7591	LAUREL236	LARLMDCC5MD	N/A	Prefix Type: CLEC Switch Name: LAUREL Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: LARLMDCC5MD))
301-323-2XXX	MD	LEVEL 3 TELECOM OF MARYLAND, LLC - MD (Lumen Technologies, Inc)	0017348202	RMD0006082	7591	LAUREL236	LARLMDCC5MD	N/A	Prefix Type: CLEC Switch Name: LAUREL Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: LARLMDCC5MD))
301-323-3XXX	MD	NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)	0003291192	RMD0036909	4036	LAUREL236	BTVLMD18GT0	02/11/2010	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: BTVLMD18GT0))
301-323-4XXX	MD	LEVEL 3 TELECOM OF MARYLAND, LLC - MD (Lumen Technologies, Inc)	0017348202	RMD0006082	7591	LAUREL236	LARLMDCC5MD	N/A	Prefix Type: CLEC Switch Name: LAUREL Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: LARLMDCC5MD))
301-323-5XXX	MD	NEW CINGULAR WIRELESS PCS, LLC - DC (AT&T Wireless)	0003291192	RMD0036909	4036	LAUREL236	BTVLMD18GT0	02/11/2010	Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: BTVLMD18GT0))
301-323-6XXX	MD	LEVEL 3 TELECOM OF MARYLAND, LLC - MD (Lumen Technologies, Inc)	0017348202	RMD0006082	7591	LAUREL236	LARLMDCC5MD	N/A	Prefix Type: CLEC Switch Name: LAUREL Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: LARLMDCC5MD))
301-323-7XXX	MD	LEVEL 3 TELECOM OF MARYLAND, LLC - MD (Lumen Technologies, Inc)	0017348202	RMD0006082	7591	LAUREL236	LARLMDCC5MD	N/A	Prefix Type: CLEC Switch Name: LAUREL Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: LARLMDCC5MD))
301-323-8XXX	MD	BANDWIDTH.COM CLEC, LLC - MD	0017042060	RMD0003709	071F	LAUREL236	NOCLLIKNOWN	01/26/2010	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))
301-323-9XXX	MD	LEVEL 3 TELECOM OF MARYLAND, LLC - MD (Lumen Technologies, Inc)	0017348202	RMD0006082	7591	LAUREL236	LARLMDCC5MD	N/A	Prefix Type: CLEC Switch Name: LAUREL Switch Type: N/A LATA: N/A Tandem: N/A 🔧 Explore Switch(CLLI: LARLMDCC5MD))