DEC Facility Codes

Many DEC serial numbers begin with a two or three letter code. this code corresponds to the DEC facility where the item was manufactured.

Code		Facility
AB	ABO	Albuquerque, NM
AK	AKO	Acton Nagog Park, MA
AY	AYO	Ayr Scotland
BK	BKO	Germany
CA	CAO	Misato, Japan
	CRL	Cambridge Research Labs, MA
CX	CXO	Colorado Springs, CO
DY	DYO	Dayton, OH
GA	GAO	Galway, Ireland
HK	HKO	Hong Kong
HL	HLO	Hudson, MA
HM	HMO	(unknown), Ireland
HY	HYO	(unknown), Japan
IQ	IQO	(unknown)
KA	KAO	Kanata Ontario
KB	KBO	Kaufbeuren Germany
KL	KLO	Clonmel, Ireland
	LKG	Littleton (King Street), MA
ML	MLO	Maynard (The Mill), MA
MR	MRO	Marlborough, MA
NI	NIO	Salem, NH
OG	OGO	Stow, MA
PC	PCO	Irvine, Scotland
PY	PYO	(unknown)
	SHR	Shrewsbury, MA
TA	TAO	Tachi, Taoyuan, Taiwan
TY	TYO	(unknown), Japan
WF	WFO	Westfield, MA
WM	WMO	Westminster, MA
ZK	ZKO	Nashua, NH
ZS	ZSO	Bellevue (DECwest), WA

For Alpha computer systems, the format used is SSYWWNNNNN, where SS is a two-character site code for the DEC manufacturing facility, Y is the year (Alpha starts at 5, for 1995), WW providing a two-digit week within the year from 01 to 52, and a sequential number.

For example, my AlphaServer ES40 has a serial number of AY93015765. This decodes as follows:

Facility	AY	Ayr Scotland
Year	9	1999
Week	30	18-24 July
Number	15765