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| name | tag | full name | site | registration | |
|---|---|---|---|---|---|
| UBERSKILLED | -uS# | uber Skilled | 10 years | ||
| UGCLAN | uG. | Underground Gaming | 10 years | ||
| USELESS | useLess. | useLess | 11 years | ||
| UTX | |UTX| | Urban Terror eXtreme | 11 years | ||
| UTS | STARS* | Urban Terror Stars | 11 years | ||
| UDT | [udt] | Urban Demolition Team | 11 years | ||
| URBANUNIT | |U`u| | Urban Unit | urban-unit.fr | 11 years | |
| URS | [URS] | Urban Souls | 11 years | ||
| UNBALANCED | </> | unbalanced | unbalanced-clan.com | 11 years | |
| USLESS | usLess. | usLess | 11 years | ||
| USNDEVGRU | US Navy Special Warfare Developm | 12 years | |||
| URBM | .UrM | Urban Mafia | urmclan.webs.com | 12 years | |
| URBANWARIORS | |URW| | URBANWARIORS | pspgunz.org | 12 years | |
| UCRUSADERS | |UC| | Urban Crusaders | urbancrusaders.forumotion.com | 12 years | |
| UGC | [UGC] | UltimateGamers | ultimategamers.de | 12 years | |
| UNWANTED | *u| | Unwanted Clan | u-clan.co.cc | 12 years | |
 | UNDSO | Untitled, national Dream-Stick-O | undso.pro | 12 years | |
| UR | Urban Rebels | urban-rebels.forumfree.it | 12 years | ||
| UKN | .uKn. | Unknown | ukn-clan.tk | 13 years | |
| UFM | {#UFM} | Urban Form -> dead | f2kpclan.tk | 13 years | |
| UTP | UTP| | Urban Team Players | utp-clan.eu | 13 years | |
| UKZ | |uKz| | UnrealKillerz | ukzclan.com | 13 years | |
| UOR | -gfe1 | hedtbedb | 14 years | ||
| URTU | [UrTu] | UrbanTurkiye | urtu-clan.com | 14 years | |
 | UM | .um | Urban Mulchers | urbanmulcher.webuda.com | 14 years |
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