| Company | City | WMI | |
|---|---|---|---|
| D&D Sales | Ione WA | 1D9-425 | |
| D&D Speed & Decal Shop, Inc. | Shreveport LA | 1D9-390 | |
| D&D Trailer Repair | Yakima WA | 1D9-301 | |
| D&D Trailers | Mustang OK Ridgefield WA | 1D9-178 1D9-406 | |
| D&H Enterprises | Collins MS | 1D9-004 | |
| D&H Truck Equipment, Inc. | San Diego CA | 1D9-342 | |
| D&J Fabricating, LLC | Comstock Park MI | 1D9-435 | |
| D&J Trailer Manufacturing & Sales | Ulm MT | 1D9-281 | |
| D&L Trailers | Elkton SD | 1D9-227 | |
| D&M Products | Strawn IL | 1D9-351 | |
| D&M Trailers | Gulfport MS | 1D9-203 | |
| D&R Metal Fabricating, Inc. | Georgetown KY | 1D9-427 | |
| D&S Trailer Sales | Plover WI | 1D9-330 | |
| D&S Trailers | Brockport NY | 1D9-160 | |
| D. Hart Designs, Inc. | Excelsior MN Excelsior MN | 1H9-332 5HH | |
| D.J. Trailers & Welding | Wayne OK | 1D9-365 | |
| Dabco Fabrication | Philomath OR | 1D9-379 | |
| Dacus Manufacturing,Inc. | Jacksonville TX | 41U | |
| Daigle Trailers | Perris CA | 1D9-407 | |
| Dakota Manufacturing Company | Mitchell SD | 1DA | |
| Dal-Fab & Machine, Inc. | Idaho Falls ID | 1D9-432 | |
| Dale's Welding | Trumann AR | 1D9-165 | |
| Dalton Enterprises, Inc. | Rural Retreat VA | 5CL | |
| Damon Corporation | Elkhart IN Elkhart IN Elkhart IN Elkhart IN | 1D9-102 4R8 44H 5DJ | |
| Dan Dea Enterprises, Inc. | Coggon IA | 1D9-413 | |
| Dan's Repair & Manufacturing | Sanborn TX | 1D9-255 | |
| Danco Trailer Sales | Garner NC | 1D9-436 | |
| Danco Trailers, Inc. | Turlock CA | 1D9-020 | |
| Dandy Digger & Supply, Inc. | Cathlamet WA | 1D9-155 | |
| Dandy Dump, Inc. | Philadelphia TN | 1D9-233 | |
| Daniel J. Essenpreis Mfg. | Eatonville WA | 1D9-354 | |
| Daniel's Certified Welding, Inc. | Freeman VA | 1D9-439 | |
| Daral, Inc. | Delton MI | 1D9-212 | |
| Dardon, Inc. | Denver CO | 1D9-350 | |
| Dartron Industries, Inc. | Salem OR | 1D9-217 | |
| Dave Hanson Trailers | Colton CA Rialto CA | 1D9-120 | |
| Dave's Welding | Longbeach WA | 1D9-108 | |
| Dave's Welding Service | Grenada MS | 1D9-319 | |
| Daves Auto Sales | St. Joseph MO | 1D9-261 | |
| Daves Trailers | Choctaw OK | 1D9-127 | |
| David Brewer Implement Co. Inc. | Tifton GA | 4ED | |
| Davidson Enterprises, Inc. | Bakersfield CA | 1D9-130 | |
| Davis Countryside Trailer World | Pavillion NY | 1D9-152 | |
| Dawson Industries, Inc. | Elkhart IN | 1D9-355 | |
| Day's Steel & Trailer Barn | Sterlinton LA | 1D9-142 | |
| Dbat Trailer Sales & Service | Sarasota FL | 1D9-378 | |
| DC Trailer Service, Inc. | Woodland CA | 1D9-211 | |
| Debra H. Morgan Company | Linden NC | 1D9-269 | |
| Debris Systems Plus, LLC | Scotts Bluff NE | 1D9-412 | |
| Del Corporation | Lafayette LA | 1D9-401 | |
| Delavan Industries, Inc. | Buffalo NY West Seneca NY | 1D9-010 1D9-371 | |
| Delivery Design Systems | Tempe AZ | 1D9-061 | |
| Delta Manufacturing, Inc. | Newport AR Newport AR | 1E9-054 4MW | |
| Deluxe Bumper Works | Tucson AZ | 1D9-163 | |
| Deluxe Welding, Inc. | Reno NV | 1D9-359 | |
| Deluxe Works Manufacturing | Lancaster CA | 1D9-211 | |
| Demink's Trailer Sales | Pocola OK | 1D9-216 | |
| Dempster Industries, Inc. | Beatrice NE | 1D9-388 | |
| Dempster Systems | Sante Fe Spring CA | 1D9-045 | |
| Demumbreum Welding Shop | Lewisburg TN | 1D9-162 | |
| Denair Trailer Company | Turlock CA | 1D9-039 | |
| Dentco Trailer Company | Mountain Home AR | 1D9-200 | |
| Denton Metal Works | Mountain Home AR | ||
| Design Mobile Systems, Inc. | Elkhart IN | 1D9-104 | |
| Dethmers Manufacturing Co. | Boyden IA | 15D | |
| Dewalt Utility Trailers | Bono AR | 1D9- | |
| Dewitt Enterprises, Inc. | Sherman TX | 4FF | |
| DHL Enterprises, Inc. | Sacremento CA Sacramento CA Sacramento CA | 1B9-114 1P9-143 4KU | |
| Diamond | Raton NM | 1D9-207 | |
| Diamond B Trailer Works | Redmond OR Redmond OR | 1B9-075 1D9-197 | |
| Diamond C Trailer Mfg. | Mount Pleasant TX | 46U | |
| Diamond D Trailer Mfg. | Blue Rapids KS Blue Rapids KS Strawberry Plains TN Blue Rapids KS Shenadoah IA | 1D9-112 1D9-121 1D9-430 4EY | |
| Diamond G Trailers | 1D9-094 | ||
| Diamond H Sales | Warren IL | 1D9-192 | |
| Diamond K Manufacturing | Elgin OR | 1D9-111 | |
| Diamond Machining Company | Caldwell ID | 1D9-231 | |
| Diamond T Trailers | Rattan OK | 5FW | |
| Diamond T Trailers, Inc. | Montpelier ID | 1D9-110 | |
| Diamond Z Trailer, Inc. | Middleton ID | 1D9-147 | |
| Diamondback Trailer Mfg. | Forth Worth TX Kittanning PA | 1D9-389 4NG | |
| Diamondback Trailers | Uvalde TX | 1D9-387 | |
| Diamondstar Trailer Industries, Inc. | Charleston SC | 1D9-382 | |
| Dick's Welding, Inc. | Windom MN | 1D9-415 | |
| Dickson Industries, Inc. | Tecumseh OK | 1D9-193 | |
| Dico Trailer, Inc. | Corona CA | 4AG | |
| Diedrich Drill, Inc. | Laporte IN | 1D9-369 | |
| Diesel Electric Service Supply | Salt Lake City UT | 1D9-268 | |
| Dimensional Homes, Inc. | Allegheny NY | 1A9-149 | |
| Direct Sales | Emmitsburg MD | 1D9-234 | |
| Diversified Metals, Inc. | Monson MA | 1T9-230 | |
| Diversified Service | Hawthorne NV | 1D9-434 | |
| Dixie Craft Trailers, Inc. | Europa MS | 13D | |
| DJ Steel & Construction Corp. | Ghent NY | 1D9-224 | |
| DMF Industrial Machinery | Milesburg PA | 1JP | |
| DNA Enterprises, Inc. | Goshen IN | 4DG | |
| Dodger Trailer Manufacturing | Belle Plaine MN | 1D9-259 | |
| Dominion Boat & Yacht, Inc. | Placida FL | 411 | |
| Donahue Corporation, the | Durham KS | 1D9-221 | |
| Donna Ford | Clackamos OR | 1D9-143 | |
| Doolittle Trailer Mfg. Co., Inc. | Holts Summit MI | 1DG | |
| Doonan Trailer Corporation | Great Bend KS | 1D9-208 | |
| Dorcheat Manufacturing Co. | Minden LA | 1D9-340 | |
| Doskovil Industries, Inc. | San Bernardino CA | 1D9-254 | |
| Double D Distributors, Inc. | Pink Hill NC | 1D9-363 | |
| Double D Trailers | South Fulton TN | 1D9-250 | |
| Double Delight, Inc. | Elkhart IN | 1D9-395 | |
| Double J Custom Trailers | Spanish Fork UT | 1D9-409 | |
| Double P Fabrication & Instalation | Jonesborough TN | 4FZ | |
| Double R Trailers | Liberty TX | 1D9-424 | |
| Double S Enterprises | Westlock AB | 2D9-088 | |
| Double S Welding | Foyit OK | 1D9-246 | |
| Douglas Marine Corporation | Douglas MI | 1D9-243 | |
| Douglas P. Jenkins | Colon MI | 1B9-239 | |
| Douglas Trailers | Spartanburg SC | 1D9-260 | |
| Douglas Truck Bodies, Inc. | Bakersfield CA | 1C9-498 | |
| Dover Trailer & Fabricating | Dover TN | 1D9-386 | |
| Drake Trailers | Edinburgh IN | 1D9-356 | |
| Dreamline Trailers | Keller TX | 1D9-331 | |
| Dressen Custom Trailers | Dell Rapids SD | 4GB | |
| Dri-Doc, Inc. | Gassville AR Mountail Home AR | 4U8 | |
| Dropbox, Inc. | Ironton OH | 1D9-408 | |
| DTS, Inc. | Harrington DE | 1D9- | |
| Duckworth Boat Works, Inc. | Clarkson WA | 1D9-384 | |
| Duke Trailer Manufacturing, Inc. | Powell TN | 5CS | |
| Duluth Trailer Sales, Inc. | Duluth GA | 4HD | |
| Dumas Welding, Inc. | Dumas AR | 1D9-393 | |
| Dun-Rite Manufacturing | Denver CO | 1D9-398 | |
| Duncan Supply Company | Marion NC | 1D9-022 | |
| Dur-A-Lift | George IA | 1D9-720 | |
| Duralite Manufacturing | Rolla MO | 1D9-238 | |
| Duralite, Inc. | Watertown SD | 1D9-141 | |
| Durango Trailer Manufacturing | Durango CO | 1D9-226 | |
| Durnell Industries, Company | Emmetsburg IA | 1D9-114 | |
| Dutch Park Homes, Inc. | Goshen IN | 1D9-396 | |
| Dutch Park, Inc. | Goshen IN | 1D9-373 | |
| Dutchmen Manufacturing, Inc. | Middlebury IN | 1D9-134 | |
| Duval Manufacturing, Inc. | Rancho Murieta CA | 1D9-115 | |
| Dycorp | Ananheim CA | 1K9-045 | |
| Dynamic Air Systems | Rome NY | 1D9-348 | |
| Dynamic Complete Designs, Inc. | Myrtle Creek OR | 1D9-001 | |
| Dynamic Composite Designs, Inc. | Myrtle Creek OR | 1D9-043 | |
| Dynamic Fiber Ltd. | St-Jacques NB | ENT |
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 1-9
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 low-speed vehicles |
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