MCI Tandem List

 

The unofficial tandem list of the MCI network (now part of Verizon Business)

The following is a list of MCI tandems circa 2000. This list was provided by the late telephone researcher Mark Cuccia (1961-2014).  This is a list of native MCI tandems that does not include Worldcom or any other systems, as they were pretty much kept as separate entities, even in 2021. This is not assumed to be an all inclusive list, and nowhere near correct. If you know of any corrections, please contact us and we will work on getting this fixed. Thanks!

 

ID	SWITCH				REGION

211	PRY2				MID ATL
212	CHT1		    		NOR EAST
213	WPL2 	White Plains NY		NOR EAST
215	BRW2				MID WEST
216	WRG4				MID ATL
21A	AUB2	?Auburn AL? KY?		SO EAST
21B	DNJ1	Denver CO		WEST
21C	SAJ3	San Antonio TX		SO WEST
21E	BRK1	?Brownsville TX?	SO WEST
21F	GRN2	Greensboro NC		SO EAST
21G	CHT2				NOR EAST
21H	RIA1	Rialto CA		PACIFIC
21K	CRJ1	Corpus Christi TX	SO WEST
21L	DNJ2	Denver CO		WEST
21M	SEJ5	Seattle WA		WEST -   ? US/Canada gateway ?
21N	LUB2	?Lubbock TX?		SO WEST
21Y	POT2				MID ATL
23E	SCR2	Sacramento CA		PACIFIC
23I	MEM2	Memphis TN		SO EAST
23J	WYV2				MID WEST
23K	IRV3	?Irving TX?		SO WEST
23N	POT1				MID ATL
23T	HLB2				NOR EAST
25I	OMJ2	Omaha NE		WEST
2AK	DMG1				PACIFIC
2AL	SFC3	San Francisco CA	PACIFIC
2AM	SHO1	Sherman Oaks CA		PACIFIC
2AP	JKV1	Jacksonville FL		SO EAST
2AZ	HOU6	Houston TX		SO WEST
2BE	DNG2				MID WEST
2BF	IPL2	Indiannapolis IN	MID WEST
2BG	PIT4	Pittsburgh PA		MID ATL
2BJ	IRV2	?Irving TX?		SO WEST
2BK	NYCD	New York City NY	NOR EAST
2BL	NEO1	New Orleans LA		SO EAST
2BM	WRG2				MID ATL
2BP	AST2	Austell GA		SO EAST
2BR	GRN1	Greensboro NC		SO EAST
2BZ	NYCE	New York City NY	NOR EAST
2CB	HAY1	Hayward CA		PACIFIC
2CD	BRW1				MID WEST
2CE	DMG2				PACIFIC
2CG	WAS6	Washington DC		MID ATL
2CH	PHL6	Philadelphia PA		MID ATL
2CJ	WIT1	(several possible AZ)	WEST
2CK	NRL1				MID WEST - US/Canada gateway
2CL	DAL9	Dallas TX		SO WEST
2CQ	PRY1				MID ATL
2CS	WSP1				MID WEST
2CT	WYV1				MID WEST
2CU	WPL1	White Plains NY		NOR EAST
2CV	AUB1	?Auburn AL? KY?		SO EAST
2CX	NBW1	?New Brunswick NJ?	MID ATL
2CY	SRD1	?Springfield MA?	NOR EAST
2CZ	IDC2	?Independence MO?	SO WEST
2D4	POB1				SO EAST
2DK	MIM3	Miami FL		SO EAST
2EA	RIC2	Richmond VA		MID ATL
2EB	NRL2				MID WEST - US/Canada gateway
2ED	MNJ1	Minneapolis MN		WEST
2EE	HOU5	Houston TX		SO WEST
2EF	PHI7	Phildelphia PA		MID ATL
2EG	OMJ1	Omaha NE		WEST
2EH	HAY2	Hayward CA		PACIFIC
2EJ	AST3	Austell GA		SO EAST
2EK	SEJ1	Seattle WA		WEST -   ? US/Canada gateway ?
2EL	WSP2				MID WEST
2EO	RIA2	Rialto CA		PACIFIC
2HH	IRV1	?Irving TX?		SO WEST
2II	DNG1				MID WEST
2OP	HLB3				NOR EAST
2QQ	ATL2	Atlanta GA		SO EAST
2RR	AST1	Austell GA		SO EAST
2XX	WAS5	Washington DC		MID ATL
2ZZ	IDC1	?Independence MO?	SO WEST
A07	DNJH	Denver CO		WEST
A26	WAS7	Washington DC		MID ATL
AAD	WIT6	(several possible AZ)	WEST
ACY	MNJK	Minneapolis MN		WEST
AGQ	CHTG				NOR EAST
AGW	RCH1	?Richardson TX?		SO WEST
AHA	HAYD	Hayward CA		PACIFIC
AUL	SAR1				PACIFIC
AWT	ATLC	Atlanta GA		SO EAST
AYM	PLV3				MID ATL
AYU	RIA6				NOR EAST
ELB	ELM1				NOR EAST