Displaying networks starting with U
UCCN (Ranked #883)	13 chans	27 users
ugIRC (Ranked #76)	154 chans	891 users
UGNetwork (Ranked #490)	33 chans	74 users
UK-Chatzone.co.uk	3 chans	0 users
UKChatalot.co.uk (Ranked #722)	26 chans	42 users
Ukchatlineone (Ranked #434)	57 chans	88 users
UKChatterbox (Ranked #63)	115 chans	1,036 users
UKChatters-Planet.co.uk (Ranked #646)	19 chans	50 users
UKfunchat	2 chans	0 users
UKhappychat (Ranked #932)	115 chans	22 users
UKScifi (Ranked #760)	123 chans	38 users
Ultra-Chat	9 chans	0 users
UltraDominio (Ranked #860)	9 chans	28 users
ultrAslan (Ranked #1012)	30 chans	16 users
Umbranet (Ranked #474)	61 chans	78 users
undeadarmy.com (Ranked #845)	5 chans	30 users
Under-Web (Ranked #1094)	1 chans	3 users
UndergroundChat.de (Ranked #504)	35 chans	72 users
undergroundnews (Ranked #738)	11 chans	40 users
UnderMind (Ranked #426)	60 chans	90 users
UndermindedNetwork (Ranked #528)	44 chans	69 users
Undernet (Ranked #2)	25,374 chans	106,488 users
UnderWorld (Ranked #210)	186 chans	248 users
Uni-IRC (Ranked #293)	53 chans	156 users
UniBG (Ranked #9)	14,967 chans	10,741 users
UniBrasil.net	78 chans	0 users
UniNet-FR (Ranked #555)	51 chans	64 users
United-Systems (Ranked #219)	25 chans	234 users
UnitedChat.net (Ranked #424)	75 chans	90 users
Universium (Ranked #814)	57 chans	32 users
UniversNet (Ranked #514)	82 chans	71 users
Unixfreunde.de (Ranked #404)	31 chans	98 users
Unknown.com.mx (Ranked #512)	32 chans	71 users
UnlogicalIRC (Ranked #206)	117 chans	251 users
uplinkcorp (Ranked #677)	32 chans	46 users
URChat (Ranked #565)	41 chans	62 users
us.com (Ranked #1076)	6 chans	9 users
USAChatterbox (Ranked #874)	28 chans	27 users
User-4you.de	1 chans	0 users

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Networks in bold have an active representative