| UAFU |  | uafl | MU | United Africa Feeder Line | www.uaflshipping.com/ | |
| UBBU | | interbulk | NL | Den Hartogh Dry Bulk Logistics | www.denhartogh.com/ | |
| UBTU |  | | MN | International Freight Forwarding Centre of Ulaanbaatar | www.iffc.mn/ | |
| UCCU | | | RU | LLC. Universal Container Company 1520 | www.uniwagon.com/business/transportation/ | |
| UCDU | | | AE | Universal Inc. Container Trading LLC. | | |
| UCLU | | unicorn | ZA | Ocean Africa Container Line (Pty.) Ltd. | www.grindrod.co.za/ | |
| UCSU | | | GB | Universal Container Services Ltd. | www.universal-containers.com/ | |
| UESU | | ues | CN | UES International (HK) Holdings Ltd. | www.ueshk.com/ | |
| UETU | | ues | HK | UES International (HK) Holdings Ltd. | www.ueshk.com/ | |
| UGCU | | uniper | DE | Uniper Global Commodities SE. | www.uniper.energy/ | |
| UKOU | | miyabe | JP | Miyabe Transport Co., Ltd. | | |
| ULCU | | unico | KR | Unico Logistics Co., Ltd. | www.unicologx.com/ | |
| ULTU | | ultrafreezer | KR | Ace Engineering & Co., Ltd. | www.acecontainer.com/ | |
| UMJU | | | DE | AS Containerhandel & Service GmbH. | www.as-containerhandel.de/ | |
| UMPE | | | JP | Ube-Maruzen Polyethylene Co., Ltd. | www.ube.com/ | |
| UMPU | | | JP | Ube-Maruzen Polyethylene Co., Ltd. | www.ube.com/ | |
| UMTU | | ube | JP | Ube Material Industries Ltd. | www.ubematerial.com/ | |
| UMXU |  | umax | US | Union Pacific / CSX Intermodal | www.up.com/customers/premium/umax/index.htm | |
| UNKU | | unik | JP | Uni-X Engineering Co., Ltd | www.unix-engineering.co.jp/ | |
| UNSU | | | US | United Nations Organisation | www.un.org/ | |
| UPAU | | ultra pure chemicals | GB | KMG Ultra Pure Chemicals Ltd. | kmgchemicals.com/our-businesses/electronic-chemicals/facilities/riddings-uk/ | |
| UPFU | | | US | Union Pacific Railroad Co. | www.up.com/ | |
| UPRU | | arrowedge | US | Union Pacific Railroad Co. | www.up.com/ | |
| UPTU | | bulktainer | US | Union Pacific Railroad Co. | www.up.com/ | |
| UPUU | | union pacific | US | Union Pacific Railroad Co. | www.up.com/ | |
| USAU | | | US | U.S. Department of Defense - Army | www.sddc.army.mil/ | |
| USFU | | | US | U.S. Department of Defense - Air Force | www.airforce.com/ | |
| USGU | | | US | U.S. Army Surface Deployment & Distribution Command | www.sddc.army.mil | |
| USMU | | | US | U.S. Department of Defense - Marine Corps | www.marines.mil/ | |
| USNU | | | US | U.S. Department of Defense - Navy | www.navy.mil/ | |
| UTCU | | stolt | BM | Stolt Tank Containers Leasing Ltd. | www.stolt-nielsen.com/ | |
| UTKU | | | US | Unitek Solvent Services Inc. | www.uniteksolvent.com/ | |
| UTLU | | universal | US | Universal Truckload Services Inc. | www.universallogistics.com/ | |
| UTTU | | interbulk | NL | Den Hartogh Liquid Logistics bv. | www.denhartogh.com/ | |
| UXEU | | unix-e | JP | Unix Engineering Co., Ltd. | www.unix-engineering.co.jp/ | |
| UXXU | | ues | CN | UES International (HK) Holdings Ltd. | www.ueshk.com/ | |
| UZUU | | liski | UA | State Administration of Railway Transport of Ukraine | liski.ua/ | |
