CHASSIS BUILDERS

COMPANY	VIN CODE	ACTIVE	NOTES
Ajax Manufacturing Co aka Hercules Ajax Manufacturing Co aka Hercules Enterprises LLC	1AJ	1970s-2000s	_
Allied Products	none	1960s-1970s	re Loadcraft?
Armor Chassis	5AX	1990s-2000s	_
Aztec	1AZ	1980s	_
J.D. Bertolini Industries Ltd	1BZ 10Y	1970s-1980s	_
Budd Company	1BK	1970s-1980s	ex Gindy Manufacturing Corp
Charleston Marine Containers Inc	5D7	2000s	_
Cheetah Chassis	5EF	2000s	_
Chienhuey Industries Corp	??	1990s	imported?
Chun Yuan Steel Industry Co Ltd	??	1980s	imported from Taiwan ROC
Clark Equipment aka Brown?	none	1970s	_
Clark Trailer	1CD	1990s	_
Comet	??	1970s	_
Container Enterprise aka Chief Industries Inc	1C9	1990s	_
Direct Chassis aka Direct Trailer & Equipment	5SE	2000s	emblem also found on PRC built chassis
Dorsey Corp	1DT	1970s-1980s	_
Dunham	1DN	1970s-1980s	_
Fruehauf Trailer Co.	1H2 1H4	1970-1980s	_
Fruehauf de Mexico	??	1980s	_
Gindy Manufacturing Corp	none	1960s-1970s	bought by Budd in 1968
Garden State Chassis	48Z	1990s-2000s	_
Great Dane Trailers Inc	1GR	1990s	_
Heartland Rig	5AB	1990s-2000s	_
Highway Industries Inc	none	1970s	_
Holden Industries	12H	1990s	_
Houston Marine Container	1VB	1980s	_
Hyundai	145 3HC	1980s-2000s	plant moved to Mexico
Jindo	KR1	1980s-2000s	imported from South Korea
Loadcraft aka Bush Hog Loadcraft	1LD	1970s-1980s	ex Allied Products?
Mecox Resources S.A.de C.V.	3MZ	1990s-2000s	_
Miller Trailers Inc	1ML	1970s-1990s	later Oshkosh
Monon later HPA Monon	1NN	1980s-2000s	_
Oshkosh	4ML	1990s	ex Miller Trailers
Pratt Enterprises	1P9	1980s-1990s
Qingdao Singamas Industrial Vehicle Co	L81	2000s	imported from PRC
Reinke	1R9	1990s	_
Reinke Manufacturing Co	4C6	2000s	_
Shanghai Jindo Container Co	LV1	2000s	imported from PRC
Shoals American Industries Inc	1HZ	1980s	_
Shenzhen CIMC Vehicle	LRJ	2000s	imported from PRC
Stoughton	1DW	1990s-2000s	_
Strick	1S1	1970s-1990s	later Cheetah
Theurer Inc	1TA	1960s-1980s	_
Titan Inc	165	1980s	_
Trailmobile aka Pullman Trailmobile	1PT	1970s	_
Transglobal Industries	148	1980s	_
Trinity	14J	1980s	_
Utility Trailer Manufacturing	1UY	1960s-1980s	_
Vulcan	none	1970s	_
Wabash National	1JJ	1980s-2000s	_
Yangzhou Tonghua Semi-Trailer Co Ltd	LT1	2000s	_

Notes:
VIN code is the first three digits of the 17 digit VIN number which was assigned to all companies after 1980.
The first digit of the VIN indicates the country built:
1 = USA
2 = Canada
3 = Mexico
4 = USA
5 = USA
K = Korea
L = Peoples Republic of China (PRC)
Chinese manufacturers have largely taken over the chassis market in the past several years.