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npa-nxx	State/Province	Company	FRN	RMD	OCN	Rate Center	CLLI	Assign Date	Misc
412-231	PA	VERIZON PENNSYLVANIA, INC. (Verizon Communications)	0020249777	RMD0002962	9208	PTTSBGZON1	PITBPANSDS0	00/00/0000	Prefix Type: RBOC Switch Name: PGCZ 1 Switch Type: WECO 5ESS (Digital) LATA: Pittsburgh PA (234) Tandem: N/A 🔧 Explore Switch(CLLI: PITBPANSDS0))
412-231 is split into 1,000-number blocks - detail below
412-231-0XXX	PA	VERIZON PENNSYLVANIA, INC. (Verizon Communications)	0020249777	RMD0002962	9208	PTTSBGZON1	PITBPANSDS0	N/A	Prefix Type: RBOC Switch Name: PGCZ 1 Switch Type: WECO 5ESS (Digital) LATA: Pittsburgh PA (234) Tandem: N/A 🔧 Explore Switch(CLLI: PITBPANSDS0))
412-231-1XXX	PA	VERIZON PENNSYLVANIA, INC. (Verizon Communications)	0020249777	RMD0002962	9208	PTTSBGZON1	PITBPANSDS0	N/A	Prefix Type: RBOC Switch Name: PGCZ 1 Switch Type: WECO 5ESS (Digital) LATA: Pittsburgh PA (234) Tandem: N/A 🔧 Explore Switch(CLLI: PITBPANSDS0))
412-231-2XXX	PA	VERIZON PENNSYLVANIA, INC. (Verizon Communications)	0020249777	RMD0002962	9208	PTTSBGZON1	PITBPANSDS0	N/A	Prefix Type: RBOC Switch Name: PGCZ 1 Switch Type: WECO 5ESS (Digital) LATA: Pittsburgh PA (234) Tandem: N/A 🔧 Explore Switch(CLLI: PITBPANSDS0))
412-231-3XXX	PA	VERIZON PENNSYLVANIA, INC. (Verizon Communications)	0020249777	RMD0002962	9208	PTTSBGZON1	PITBPANSDS0	N/A	Prefix Type: RBOC Switch Name: PGCZ 1 Switch Type: WECO 5ESS (Digital) LATA: Pittsburgh PA (234) Tandem: N/A 🔧 Explore Switch(CLLI: PITBPANSDS0))
412-231-4XXX	PA	VERIZON PENNSYLVANIA, INC. (Verizon Communications)	0020249777	RMD0002962	9208	PTTSBGZON1	PITBPANSDS0	N/A	Prefix Type: RBOC Switch Name: PGCZ 1 Switch Type: WECO 5ESS (Digital) LATA: Pittsburgh PA (234) Tandem: N/A 🔧 Explore Switch(CLLI: PITBPANSDS0))
412-231-5XXX	PA	VERIZON PENNSYLVANIA, INC. (Verizon Communications)	0020249777	RMD0002962	9208	PTTSBGZON1	PITBPANSDS0	N/A	Prefix Type: RBOC Switch Name: PGCZ 1 Switch Type: WECO 5ESS (Digital) LATA: Pittsburgh PA (234) Tandem: N/A 🔧 Explore Switch(CLLI: PITBPANSDS0))
412-231-6XXX	PA	VERIZON PENNSYLVANIA, INC. (Verizon Communications)	0020249777	RMD0002962	9208	PTTSBGZON1	PITBPANSDS0	N/A	Prefix Type: RBOC Switch Name: PGCZ 1 Switch Type: WECO 5ESS (Digital) LATA: Pittsburgh PA (234) Tandem: N/A 🔧 Explore Switch(CLLI: PITBPANSDS0))
412-231-7XXX	PA	VERIZON PENNSYLVANIA, INC. (Verizon Communications)	0020249777	RMD0002962	9208	PTTSBGZON1	PITBPANSDS0	N/A	Prefix Type: RBOC Switch Name: PGCZ 1 Switch Type: WECO 5ESS (Digital) LATA: Pittsburgh PA (234) Tandem: N/A 🔧 Explore Switch(CLLI: PITBPANSDS0))
412-231-8XXX	PA	VERIZON PENNSYLVANIA, INC. (Verizon Communications)	0020249777	RMD0002962	9208	PTTSBGZON1	PITBPANSDS0	N/A	Prefix Type: RBOC Switch Name: PGCZ 1 Switch Type: WECO 5ESS (Digital) LATA: Pittsburgh PA (234) Tandem: N/A 🔧 Explore Switch(CLLI: PITBPANSDS0))
412-231-9XXX	PA	ONVOY, LLC - PA (Sinch)	0004323028	RMD0001966	547E	PTTSBGZON1	NOCLLIKNOWN	01/25/2016	Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Pittsburgh PA (234) Tandem: N/A 🔧 Explore Switch(CLLI: NOCLLIKNOWN))